JPS5839413A - Manufacture of concrete not hardened - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Regarding the nematode concrete pipe selection method of the present invention, various senna information that depends on the mixing ratio t1 of extra-thick material, the raw concrete fine structure condition, the time of measuring raw materials, and the mixing # by a mixer. Concerning a method for producing ready-mixed concrete that controls p-modification through taste processing - Concrete of different quality can be obtained depending on its use by changing the mixing ratio of its raw materials. In other words, based on the premise of obtaining an economically cheap (homogeneous) product, we can vary the blending ratio of raw materials such as cement, bone, water, and admixtures that make up the concrete.

It is necessary to select a concrete pipe of the desired quality by comprehensively considering the structure in which concrete is used - 08 m, weather conditions, construction method, etc. In this case, 1 quality refers to the S degree, or workability, of ease of soldering in uncured concrete, and refers to properties such as compressive strength, durability and water tightness in hardened concrete. The former, 9-cabinity, is represented by the construction softness of concrete, that is, the slump value, which is closely related to the amount of water used in concrete, and the latter, compressive strength, is represented by the amount of O water in concrete, and the amount of water and cement. It can be seen that the ratio of cement to water (water-cement ratio) has the greatest effect. Therefore, of the desired quality;
When obtaining concrete, first of all, accurate understanding of the amount of water related to concrete becomes one of the overlapping matters.

Traditionally, raw concrete manufacturing plants have used ti, based on the specifications of orders from customers who are mineralized concrete users, and in concrete product construction, based on the usage of the product.
Desired compressive strength, durability, water V! ! ! Vigor and slump A blending ratio of raw materials O that will yield quality according to Il[K is selected in advance on a test scale, and this selected blending ratio is applied to batcher ground to produce one batch of raw materials according to the blending ratio. was supplied to a measuring bottle to produce ready-mixed concrete every 9 minutes.

However, the first problem that arises is that the above-mentioned amount of water on this platform cannot be accurately determined. Among the raw materials for concrete, coarse aggregate with a size of 5 cm or more and 5 cm
- There are fine aggregates of the following sizes, and the surface of these aggregates is defined and displayed as being in a so-called surface dry saturated state with no moisture adhering to it (referring to the so-called indicated mix).

However, in reality, Hiroko's aggregate 0 table i1 is contaminated with washing water or rainwater during storage of the aggregate, and the aggregate that is subsequently weighed in the weighing bin is contaminated. This is because the weight including water does not reach the surface dry saturated state of the formula.

It is necessary to correct this adhering water amount as part of the line mixing water amount, and after performing this correction, the needle amount must be calculated and expressed. Two conventional stockyards are being stored in order to correct the amount of adhering water and seal the parts.

Or part of the aggregate Yr in a storage bin or measuring bin [number of days] is sampled and the surface water content of the aggregate t is measured by drying or other means.The weighing and blending of the raw materials is corrected. However, the adhering water is not uniformly distributed in the aggregate, and the temperature during transportation, Il[
It is very difficult to accurately determine the amount of adhering water by measuring the surface water turbine several times a day. It is desirable to keep the water wheel constant, and considering the 11 tons of fresh concrete produced at the Batcher plant, rapid and continuous measurements are required, requiring only a few seconds to several tens of seconds. By reducing the amount of water!!!The method of determining the surface water rate t-shelf requires a great deal of effort and time if you try to accurately grasp the adhering water and determine it continuously and quickly. As a practical matter, it is a constant problem.In this way, the amount of water involved in the concrete mix (in the case of correction by water adhering to the aggregate) cannot be accurately grasped, so the quality of "slump value, compressive strength, etc." Location-〇 will also be impossible to specify.

Accurately determine the surface water content of aggregate! ! After obtaining the desired quality of concrete (by making appropriate corrections), when considering whether or not the concrete has the desired quality, as mentioned above, coarse aggregate is used as aggregate. Although there are fine aggregates, due to recent aggregate conditions, their physical properties such as particle size and shape are changing over a short period of time, so the slump value and compression 511t, which are affected by changes in physical properties, are ! The quality of the aggregate is also uncertain, and on-site mixing that takes into account the particle size and shape of the aggregate is required.

Here, we will discuss the particle size of aggregate, especially the particle size of fine aggregate, which affects the quality of concrete.

As already mentioned, the particle size of the fine aggregate is an extremely important factor in determining the mixing ratio of concrete having the desired quality.

The particle size of fine aggregate used for concrete is generally 0.15cm, 0.3cm, 0.6glue, 1.2m, L5.
It is indicated by the sum of the weight percentages (coarse particle ratio) remaining on the sieves of ■, 5■, and 10, respectively. (It is generally expressed as the percentage of the fine aggregate volume to the total volume of the fine aggregate volume and the coarse I material volume, and is called the fine aggregate ratio). ! If the coarse grain ratio of fine aggregate used in a fresh concrete manufacturing plant differs from the coarse grain ratio of fine aggregate used to determine the layout, the fine aggregate ratio of concrete will be adjusted appropriately. I have to do it.

On the other hand, ξ describes the slump value, which is the quality of concrete. As mentioned above, the slump value is construction soft I! , but ζ0llj constant is a cut-off circle-cylindrical owi*K
This is done by determining the amount of decrease in height due to the concrete's own weight when the enclosure frame is removed. However, it takes a lot of effort and time to carry out this measurement continuously throughout the production period during the ready-mixed concrete manufacturing process.
Since it is impossible for the DQ staff to perform a visual inspection, a visual inspection is performed by an expert, but the judgment tends to be subjective and the burden on the at-chief is extremely heavy. In this way, it is quite difficult to accurately judge the slump value, but it is also difficult to accurately understand the factors that influence the slump value itself. Nikusu.

In other words, in addition to the physical properties such as the surface water content of the aggregate and the particle size of the aggregate mentioned above, sensible heat and air temperature during storage have a large influence on the slump value. - The temperature of the raw materials brought into the plant, the freshness of water collected after washing the mixer car used as mixing water for mixing concrete [or mixing water for pollution prevention measures], etc. However, since these factors interact in a complex manner, it is difficult to understand accurately ((
Therefore, it is difficult to obtain the desired quality.

Even if the mix of concrete were frequently corrected manually based on the above-mentioned factor O, it would require a great deal of labor and time and would be practically impossible on site.

The quality of concrete must not only be determined in the production process of ready-mixed concrete, but also the compressive strength of hardened concrete. However, during the production of ready-mixed concrete, the only option is to estimate, for example, 9 materials + 28 days of concrete strength IItt, or to prepare with excessive additional strength in mind, which is extremely uneconomical. Furthermore, as mentioned above, there are uncertainties in the amount of water in concrete, the particle size of aggregate, the slump value, etc., so there are many sources of uncertainty when determining the desired compressive strength of concrete that has undergone a given O#. If the concrete structure does not have the specified quality, serious defects may occur.

In addition, in order to obtain the required appropriate concrete quality, such as slump value and compressive strength, it is necessary to specify the required characteristics, such as the amount of attached water, particle size, temperature, etc., and the accuracy of concrete mixing ratio. In reality, it has been impossible to reflect the results well only by copying the formulation based on conventional testing and practice.
Therefore, the present invention solves the above-mentioned drawbacks and provides ready-mixed concrete to obtain concrete of the required quality.
@Creation method # Provided by IzO.

In the present invention, in order to modify and control the blending ratio of ore and :1 concrete to obtain the required quality, information is processed by a combinator by adding information from Senna to preset ready-mixed concrete manufacturing conditions. The foundation is to do the following.

To achieve the above purpose, when the layer material is weighed in a measuring bottle and then discharged into a mixer for kneading, from the raw materials,
The basic idea is that the mixing ratio of raw materials is corrected by processing information from the raw concrete, information from the mixed ready-mixed concrete, and information from the manufacturing conditions.

The present invention will now be described in detail. #! Figure 1 shows two building mixers (Nll,
8112) is exemplified by focusing on 11 weighing machines linked to 11 weighing machines that operate based on Senna information. At a ready-mixed concrete manufacturing factory, an operator inputs a standard mixing ratio of raw materials prepared in advance based on the order specifications from a delivery destination. The raw material in the storage pin is supplied to the weighing bottle according to the raw material measurement setting value of the p1 kneading hole through this hexa, and measurement is started.

This raw material measurement start time is the first factor T! Shown below.

Raw material measurement setting value At the time when a rough measurement of the order of osos to so's has been performed, the surface water wheel of coarse aggregate and fine aggregate, cement temperature, and kneading temperature are determined using a senna installed in a measuring bin. Sludge of mixed water used as part of mixed water 1
1 degree is detected. Also, according to the weighing before the 2/f test, 5t
The slump value of concrete mixed with Kisa Nil and the i1 degree of concrete are also detected and stored in Senna. Kome l! l! ! It is the time Ts when the mixing by Kenki t*1 is completed, which is before the time T3 when the rough measurement described above is approximately completed.

Based on the surface water wheel, temperature, and degree of aggregate detected at time T, T, the standard mixing ratio set by the operator is corrected or Make corrections. This correction/correction is due to sensor information distortion;
This can be done with plenty of time to spare during weighing. After correcting and correcting the measured values, carry out micro-weighing of the raw materials and adjust the kneading/mixing amount O.
Weighing is completed at time TaK. After mixing, kneading and mixing in the construction site; confirming that the concrete is discharged to the chitpattu hopper (time Tg), and then discharging the weighed raw materials to 2x Na1. . The ecological material is discharged to mixer Ugly 1 and mixing begins immediately (time T).
During this mixing, the detection of the good slang value and concrete temperature described above is repeated. The weighing device that discharged the raw material to the mixer NIL1 starts the next coarse weighing again. .

In this way, when the rough measurement is almost completed in the measuring device, the surface water wheel, cement, and slough volume are detected, and the mixture ratio is corrected and corrected based on this inspection. The slump value and concrete temperature can be detected from the mixed concrete in the mixer, and the mixing ratio can be corrected and corrected immediately during this measurement based on the detection of lumps. in this case.

It is a good idea to measure the slump value and concrete a degree of the concrete mixed in the concrete mixer so that the mixing results in the construction mixer can be reflected in the next mixing. In the above example, two scalers are used for one set of weighing devices,
For example, a tilted kneading machine is used, which requires a relatively long time for mixing, but in the case of forced kneading, which requires a relatively short mixing time, one set of measuring equipment is used. It is sufficient to have one unit per unit. In the case of the latter forced mixing type electric mixer, the slump value and concrete temperature change from the mix of concrete in the immediately preceding patch are detected.

The general method of this *tIA example has been described above, but the calculation by the combinator will be explained in detail below. Fresh concrete manufacturing equipment can be viewed as a continuous manufacturing system consisting of complementary processes. Conventionally, when inputting the raw material mixture by an operator, the concrete quality pipe, trial mixer, and demonstration test in the plant were performed when the mixing ratio of TF, raw materials cement, aggregate, water, admixtures, etc. was varied. I) After IIM, a standard formulation that will not be changed over a long period of time is prepared in advance. Next, the order items such as specified slyf value, specified strength, coarse aggregate V @ large size, etc. from the delivery destination are compared with the standard mix table, and a compatible mix is selected and input.

In factories where a combiator is installed in parallel with the Paracha brand, this standard formulation is stored in the combinator, and when the operator inputs the order details, the combiator automatically creates the predetermined standard formulation according to the shipping requirements. can be extracted.

As for the input information of the combi-trator, information such as the mixing table, slump value, strength, maximum dimension of coarse aggregate, etc., along with the information on the delivery destination of the ready-mixed concrete, should be stored in a numbered format. I can do it, J! The information can also be stored in association with the loading amount of ready-mixed concrete on the construction truck and the construction truck number. Mara, calculation of the total amount of ready-mixed concrete delivered to the delivery destination, indication of manufacturing time, and 1
You can also automatically and dynamically record the details of the mixing amount of fresh concrete. In this way, all the predetermined information about the delivery destination is stored in association with each other, making it possible to create a centralized pipe layer during the production and delivery of raw concrete.

Now, raw materials are supplied from the storage bin to the weighing bin according to the operator's mixing instructions, and rough weighing is also started. and,
At the time when the rough measurement is almost completed, calculation is started based on the pull shown at 211th.

FIG. 2 shows an arithmetic pull using the controller. This calculation pull is for the case where two scalers are installed for the minus set of weighing devices. When the operator inputs the setting number on the operation panel 7, the mixing conditions of the concrete and the delivery destination of the ready-mixed concrete are verified, and the initial setting value 8 is called up by referring to the standard mixing table stored in advance according to the mixing conditions. This initial setting value of 8 is raw = nllI/
This shows the standard blending amount of each material for Shoyu, and the amount of cement C
1 (kg), coarse aggregate amount G l (kg), fine aggregate amount 81
(kg), water amount Wl (kg) is determined and specified! The water-cement ratio F=Wl/C1, which is related to J1 degree l, is also determined. In the actual measurement stage, this unit amount is 1@夛 (D practice 5-
The raw materials are weighed by multiplying by the weight. Based on the raw material information in the rough weighing stored in the weighing bin and 2) the information on the mixed concrete before the edge, correction/correction calculations 8' and 9 of the unit quantity are performed in the combinator.

The contents of this unit amount correction/correction calculation 8' are as follows: correction 97 of the fine aggregate ratio using the coarse particle ratio of fine aggregate; %7ment amount correction 92, water amount correction by aggregate surface water wheel 93, water amount correction by slang difference 94, water amount correction by sludge pseudo-density difference of recovered water 95, and water amount by temperature difference of mixed concrete and cement temperature difference. This is amendment 96. This unit amount correction/correction calculation 9 is an operation within the combi-meter, and it is possible to add or subtract from the initial setting value 8-, but in actual weighing, the computer quickly performs correction/correction when the rough measurement is reached. The corrected calculation results will be available, and based on these, the remaining weighing will proceed and be completed.

First, the fine aggregate ratio correction 97 based on the coarse particle ratio of fine aggregate will be explained.

The amount of fine aggregate and the amount of coarse aggregate with the initial setting value of 8 were changed to 81 (
kg) and 82 (kg), and when determining the standard coarse grain ratio FMM% of fine aggregate, which will be described later. The change rate of EC), the specific gravity of fine aggregate 88q, the specific gravity of coarse aggregate 08G, and the unit amounts of fine aggregate and coarse aggregate after correction are respectively 811 (kg) &j and G 11 (kg).
and T.

The fine aggregate ratio 8A1 (%) based on the initial setting of 1 g is expressed as 1. In addition, after the mixture correction, the 0 fine aggregate ratio 8A2 (g
6) is 8A2 proverb 8A1 +-(B) (FMM -FMP)
It is expressed as

Therefore, the corrected fine aggregate unit amount 811 (kg) and coarse aggregate unit amount G 11 (kg) are respectively determined by the following equations.

In this case, the means to obtain the coarse grain ratio of the fine aggregate used is to sample the fine aggregate from stockyard storage, storage bins, or weighing bins an appropriate number of times per day, and to perform the test method specified in JI8. As an alternative to the method of measuring aggregates, there is also a method of continuously obtaining coarse particle ratio measurement results by applying an image analysis method to fine aggregates that fall from transport, etc.

The value of the coarse grain ratio of the fine aggregate used thus obtained is input into the coarse grain ratio input device 21 each time the measurement result becomes clear. In this case, the standard coarse grain ratio F of the fine aggregate used when creating the standard recipe
MP, specific gravity of fine aggregate 88G, and specific gravity of coarse aggregate 08G
is stored in advance in the combinator along with other characteristic values.

Corresponding to the change in the fine aggregate coarse grain ratio in the above formula,
Since the values differ depending on the grain shape of the aggregate used, several values corresponding to these conditions are stored in the computer and used as desired according to the conditions.

Next, the gm is determined by the aggregate O unit amount correction 91.

Coarse aggregate KTo is the unit amount G of coarse aggregate as a result of correcting the standard mix based on the correction of the fine aggregate ratio by the fine aggregate coarse grain ratio.
11 (kg)% The surface water wheel MG (%) of the coarse aggregate determined by the automatic aggregate surface water wheel measuring device described later, the corrected amount of coarse aggregate G6 (kg) by the surface water wheel, and the coarse aggregate after correction. From weight G2 (kg), G6-Glx (MG/100) G2-G1+G6=GIX (1+(MG/100))
becomes.

Similarly, for fine aggregate, the initial setting value is 8, which is the fine aggregate amount of 81.
(kg), fine aggregate surface water wheel M8 (chi χ correction amount of fine aggregate by surface water wheel 86 (kg), fine aggregate amount after correction 82
(kg), then 86 = 81 I will say 3kJK. FIG. 3 shows the weighing bin 22 as a whole, in which the aggregate 21 which has been subjected to pIIktB and coarse weighing is retained. A suitable level needle detects the point at which the ratio detection part insertion hole 27 formed at the bottom of the weighing bottle 22 is filled with aggregate 21 before the measurement is completed, and a signal from this level needle is sent to the detection part insertion air cylinder 26. input, actuate the air cylinder 26, and detect the needle-like detection part 2 of the surface water rate constant device.
5 through the detection part insertion hole 27 into the protective tube 24 of the insertion detection part and inserted into the aggregate 21. In the needle test tHII125, the capacitance t11 of the aggregate between the measurement electrodes is determined, and the surface water wheel having a certain relationship with this capacitance is stored in the combination 1-1.

The relationship between 9ID capacitance and surface water wheel varies depending on the particle size of the aggregate. Select and use. After measuring the capacitance and before the aggregate 21 is discharged from the weighing bottle 22, the air cylinder 26t is activated to detect the needle-like detection part 2.
5 and prepare for the next measurement. After measurement is complete, f-
)Opening/closing air cylinder 29t? Activated and released f-)28
t-Open to discharge the aggregate in the weighing bin 22 into the shaker. In addition, 23 in FIG. 3 is a plate for the aggregate to be supplied by falling. The electrical signal obtained by the needle-like detection section 25 as capacitance! The surface water percentage obtained by the conversion is involved in the correction amount of the aggregate as the above-mentioned MG (91i) and M8 (h) in block 16 of FIG. Pultsuk 16 is an automatic measuring device for aggregate surface water turbines, 161 and 162 are supplying coarse and fine aggregates in measuring bins, and 163 and 164 are moisture meters II! Measurement of water permeability, 165 and 166 respectively indicate surface water turbines obtained based on measurements.

The 45th il is a surface water wheel of fine aggregate that is measured for fresh concrete produced at a ready-mixed concrete manufacturing factory.
This is an example of the results measured for each training by the fixed means shown in Figure #I3. At the same time, 2
The surface water content obtained by measuring o times is also listed. In this fourth column, the horizontal axis indicates time, and the vertical axis indicates surface water percentage measured by a mineral moisture meter.

As a result, when using Figure 83, compared to the absolute drying method, ±
The difference is 0.4%m&, which is accurate, and in this example, the ore-
It can be measured continuously and quickly. 4W
As shown in tJ, the surface water wheel of fine aggregate changes significantly over time, and the conventional constant setting several times a day is inaccurate.
It is clear that To. In this way, the constant IR surface water rate of the aggregate per line p can be used for very accurate surface water wheel correction.

As a result of the explanations in Fig. 3s and Fig. 4, the corrected weight of the aggregate (12 (kg), 82 (kg) t-the surface water ratio M G (11), M8 (%) to be determined is the correct fIi The corrected weight Q 2 (kg), 82 (kg)
I have the utmost confidence in this.

Next, we will discuss how to correct the amount of water mixed with 0 units of water. Regarding the 0 correction of the mixing water amount, the water amount correction using the aggregate surface water wheel is performed in the calculation using the combination tool. Water amount correction 94 based on the difference in N yield, water amount correction 95 based on the difference in sluggish eel temperature of N absorption, water amount correction 96 based on the difference in m degree of kneading p;

The water amount correction amount W6 (kg) by the aggregate surface water wheel is the initial setting value G of the aggregate to the created surface water rate MG1M8 (%)
1 (kg), 81 (kg) multiplied by t, and the amount of aggregate correction by the 11-sided water wheel G6 (kg), 86 (
kg). That is, W6-
81 X (M8/100) + GI X (MQ/10
0).

The unit water amount correction amount W7 (kg) due to slump is fixed on the slump automatic side in the previous patch! This is calculated by feeding back to the J, et, etc., memorizing the computer value, and performing arithmetic processing.This will be explained below.

Below is O1! In this article, we will limit the discussion to one of the two mixers.

The unit water amount correction amount W7 (kg) O for Todoroki/Hatsuchi calculated by slang related data t fee V pack of the previous patch is configured as W7-W71 +W72.

Here, W71 (kg) is the unit water volume correction amount of this patch calculated based on the difference between the target slump value and the automatically measured slump value in the previous patch, W71 = AX (8LM snow - 8LP) XWI Using the formula, AC,)'a) is the rate of change in unit water volume for an increase in slan 7" 1 am, and S L P Con) is the target slump value 8 LMI (era
) is the automatically measured slump value in the previous patch, Wl (
kg) is the unit water volume of this patch.

W 72 (kg) is the slump-related unit water amount correction amount f:M! performed in the previous patch measurement. i patch total tK
In order to make the slide, a is corrected in proportion to the size of the water volume per patch, and using the formula, W
71' (kg) The slump-related unit water volume correction amount executed in the premine patch measurement, Wl (kg) is the unit water volume of the patch, and W1' (kg) is the unit water volume of the previous patch.

Here, the automatic slump value measuring device will be explained with reference to FIG. Since the stirring resistance during concrete kneading has a certain correlation with the slump value of concrete,
The slump value can be determined by detecting the current value or power consumption value of the ζ mixer drive motor required for kneading.

In this case, a measurement method that can be used practically must be capable of measuring at a speed that does not interfere with the manufacturing process of ready-mixed concrete, and that can obtain constant information as an electrical signal, and must be capable of measuring at a level that can be used for practical purposes. Any material may be used as long as it has accuracy, can be operated continuously during the production of ready-mixed concrete, and is durable in the measurement environment. In the example shown in FIG. 5, a current corresponding to the motor load is taken out from the mixer driving electric @ 30 by a converter, then converted to voltage by a voltage converter 31, and a detected voltage signal is sent through a voltage filter 32. A slump value is converted into a slump value by a slump value converting device 33 based on the correlation between a voltage created in advance and a slump value, and one is displayed. When measuring the current 't- of the electric motor for driving the reactor, the current consumption rises rapidly after the discharge of raw materials into the reactor begins, and reaches its maximum when the discharge is completed. Next, as the mixing of the concrete progresses, the current value decreases, and when it reaches a substantially constant value and stabilizes, the mixing of the concrete is completed. There is no difference in the pattern of such current changes even if there is a change in the type of building fence, such as a gravity type or a forced type. In this way, the output of the slump value conversion device 33 when the current consumption value is stabilized is the desired slump value. FIG. 6 is an example of the relationship between the slump value, which is constant using the slump value measuring device shown in FIG.

As is clear from this figure, the slump value of the measurement method using ffcKs- is ±8.49bml with respect to the slump value of the test method of aJI8! i.e., for concrete with slump values of 8 and 18cI11, the difference is 7aI: ''M and ±1.5a.
Wli! Therefore, a sufficiently accurate slump value can be obtained by measuring the current of the oxer drive motor.゛The 26th g-kneading slump value automatic measuring device 17 is the kneading 9 mixing of raw materials using a mixer 171. Slump value converter 33 (@51N
Each block has a slump value 173 (8LMm) obtained based on the measurement 172 and the slump value 173 (8LMm) obtained based on the measurement. In this case, the stirring resistance changes depending on the specified concrete type 4, that is, ordinary concrete, or concrete type IIIKC with a different unit volume weight such as lightweight concrete, so it is necessary to take this into account in the measurement of the slump value. There is also the mixing amount of concrete V(-)
The slump value also depends on the specified kneading p mixing amount 5, and the adjustment due to the difference in stirring resistance and the adjustment between ζ kina depending on whether one stirrer is used or multiple stirrers are used. The difference in dimension Q8 (mm) due to the maximum dimension 6 of the specified coarse aggregate is reflected in the difference in slump value, so it is necessary to take this difference into consideration. Regarding these items to be considered and g*, information obtained through tests or experience may be stored in the combinator in advance and used as necessary.

In this way, the slump value automatic measuring device 17 obtains a slump value of 8LM, (cm). In the explanation so far, the slump value is 8 for kneading and mixing the raw materials 2 batches ago.
LM wealth (cm) f is calculated, but the slump value of the mixed concrete by the measurement of the patch just before 8LMl (Cm) t- is adopted. can. The above formula W
71-A X (8LM bulk-8LPs) X Wl
, the rate of change in water volume AC”/am) is
) C) 11CrK may differ depending on the slump value of the concrete, and several types of slump values may be stored in the printer and compared with the specified slump value 2 (8LP)'. Let me choose 4. In this case, water amount correction 94
The correction amount W7 (kg) can be made more accurately.

In the correction of the amount of water collected due to the degree difference 95,
Corrected amount of water due to sludge freshness difference in recovered water W8 (kg)
Water amount change rate B (
1/%), sludge I determined by a sludge concentration measuring device [BM (ch), reference standard of the recovered water used when determining the design mix [BP (%), water amount outside the mix at the initial setting value of 8] It is expressed by Wl (kg) K, and the following formula is obtained.

W8-Bx (BM-BP) Is it possible to treat the supplied recovered water using ultrasonic waves, scattered light-transmitted light characteristics, etc.? ) IllI degree B
M Cfb) Yt measurement 5 In addition, the standard S2T y111fB P (%) will have a value of zero if clean water such as tap water is used as the mixing water when determining the recommended mixture. Become. .

In the water amount correction 96 due to the concrete or cement oaig difference, the correction amount W9 (kg) is the concrete temperature CM Snow (C), Ryument II & automatic measurement of the concrete temperature 2 batches before, determined by a concrete temperature measuring device during mixing. Cement temperature of this patch determined by device K
('C), Standard concrete temperature CP when the specified mix is determined (c), Standard cement temperature DP (°C) when the specified mix is determined, P concrete temperature on mixing! I! 1
It is expressed by the rate of change in water amount C (1/℃) with respect to an increase in temperature R1℃ (1/℃), the rate of change in water amount D (1/℃) with respect to an increase in cement temperature R1℃, and the amount of water outside the initial setting value 8 Wl (kg/j), We get the following equation.

Wl-(Cx (CMs-CP)+Dx(DM-DP)
)xW1, Ox(CM, -CP)xWt
is for the purpose of adjusting the amount of water according to the concrete mixing temperature, and DX (DM-DP) The amount of water is adjusted to deal with this.

In this case, concrete) amICM proverb (C) is the same as the slump value described above, the mixed concrete of 2 patches ago)
Constant for K. Construction cost per metering device? 1fi
- The temperature of concrete at the patch immediately before mixing is 1JCM in the batcher plant equipped with
x(t) can be adopted. The constant temperature device 20 is used for each mixing; thermocouples, electrical resistance, and thermocouples, electric resistance,
- Utilize and perform measurements. In addition, the rate of change in water amount D (1/℃) per 1℃ of cement temperature may differ depending on the cement temperature, so several types can be memorized at once depending on the temperature range of cement. Then, select according to the cement 11 degree creation result.

Regarding correction of the unit amount of kneaded mixing water, unit amount correction by aggregate surface water wheel 93, water amount correction by slang difference 9
4. Water amount correction based on recovered water slough filling level 95, water amount correction based on mixed concrete temperature and cement temperature FLLK 96f: After performing correction - weight of water after correction W
2 (kg) becomes the following formula.

W2-Wl-(ws+wy+ws+ws)-WIX(A
X (8LMs-8LP,) + BX (BM-BP) + C
X (CMI-CP)+DX (DM-DP)
)-81XM8GIXMG The unit quantity correction/correction calculation is also performed regarding the correction of the cement quantity. In the initial setting value 8, the unit amount of cement C1 (kg) and the water-cement ratio F=Wl/C1, which is related to the compressive strength of concrete, are determined.

Therefore, in order to obtain concrete having a predetermined compressive strength, it is necessary to keep the water-cement ratio constant, and it is necessary to correct the cement weight in relation to the amount of water. That is, according to the unit amount correction 92 of the cement amount, for the cement initial setting 1i180 unit cap C1 (kg) K,
Assuming the specified water-to-cement ratio), it is necessary to take into account the water amount correction other than the surface water percentage of the aggregate. That is, the corrected water amount W7 (kg) due to the slump difference, the corrected water amount W8 (kg) due to the sludge concentration difference in the recovered water, and the corrected water amount W9 (kg) due to the mixed concrete and Oajl. Thus, cement modification 92
The cement correction amount C6 (kg) is given by the following formula.

C6-(W7+W8+Wl)XCI/Wl Therefore, the corrected cement weight C2 (kg) is given by the following formula.

02-C1+06 Proverb CIX (1+(W7+W8+W9)/Wl) Until now,
In unit amount correction/correction calculation, aggregate unit amount correction 9
1. Correction of unit amount of mixing water 93.94.95.96,
In the calculation of cement unit amount correction 92, °A (
1/cm ) is the rate of change in the amount of water per 7 tons, and the sludge l1lJ is B (1/1G).
The rate of change in water volume per 111 increase, C (1/℃), is the p-conc. J-) 111jlC increase per) rate of change in water volume.

Cement 11&1tl which is D(1/C): increase per p
The rate of change in water amount and the rate of change in fine aggregate with respect to the increase in aSSi200, E, are numerical values obtained experimentally and are positive or integer values including the employee's sign. It was. The surface water percentage MG (5 g) of the coarse aggregate and the surface water percentage M8 (%) of the fine aggregate also include positive t or negative signs. In this case, the negative case means that the aggregate is in a surface dry hydrated state l1t - a state in which it can absorb water, that is, in an air dry state.
It is necessary to add an excess amount of water until the difference is 1 tc.

The above result %; After unit amount correction/correction calculation 9 in Nbinita, weight of cement after correction with unit correction setting value lO C2 (kg) b Weight of coarse aggregate after correction G z (h
g) *The weight S2 (kg) of fine aggregate after correction and the amount of water W 2 (kg) after correction/correction are obtained.

This pigeon coop is live at the initial setting of 8;
Despite showing the blending ratio of the amount of raw materials,
With the unit amount correction set value 10, the total volume of the raw materials after correction/correction is not necessarily 1-. Since the mixing amount has been determined, it is necessary to re-correct the unit quantity correction setting value 1Ot and calculate the volume correction setting value 1it of the total volume of l.

The values required to calculate the volume correction setting value 11 are the specific gravity of cement, 8G, and the volume correction coefficient, K.

Weight of cement after volume correction C3 (kg)% Weight of coarse aggregate after volume correction tG3 (kg), weight of fine aggregate after volume correction 83 (kg), weight of water after volume correction W3 (kg) )
, is a designated air nobleman I (*). In this case, the specified air amount A I (9G) is a predetermined amount and is the air content in the concrete that is involved in quality such as durability. As the volume correction setting value 1.1,
The following formula is obtained.

03-KXC2 G3=KXG2 83 Tomi KX82 W3-KXW2 3-1000 (1-(AI/Zoo) )/(100
0(1-(AI/100))+(-(C6/SG)+W
7+W8+W9)) In one step, the measurement setting value 12, which is the actual kneading setting value, is calculated by multiplying the kneading amount 5 of the 1 kneading instructed on the operation panel 7 of the operator.

The amount required for calculating the measurement setting value 12 is 1! ll
Rino; Mixing of concrete] Mixing amount v (II/), Cement weight after mixing amount correction C4 (kg), Coarse aggregate weight after mixing amount correction G4 (kg), Mixing amount correction The weight of the 11O fine aggregate is 84 (kg). The weight of water after the mixing amount is corrected is W4 (kg). The measurement setting 1!12 is a linear equation.

c4-VXC3 G4-VXG3 84=VX83 W4-VXW3 Based on this measurement setting 1112, the unit amount correction bone correction needle count 9
After carrying out the process, the appropriate amount of kneading the raw materials is determined and output as a weighing signal to each weighing device. Based on this signal, coarse weighing and fine weighing are subsequently performed to obtain the actual weighing value C5 (kg).
, G5 (kg), 85 (kg), W5 (kg) were implemented and completed. This point in time is time T4 shown in jllllrkJ. Then, information on actual weighing values 13 from each weighing bin is stored in the computer.

Although the quality of concrete is ensured by appropriately setting the mixing ratio of the raw materials described above, in this example, the strong Rt of the predetermined material age is further estimated.

There is a proportional relationship between the strength of concrete and the ment water ratio within the range where concrete has the required workability. Estimating the strength of concrete using this proportional relationship18
t-do. Namely.

The relationship between the cement water ratio of concrete prepared in advance in a laboratory and the strength of concrete at the specified material age of 28 days is compared with the cement amount and water amount calculated from the actual measurement value 13 etc., and the specified material is determined. It is used to estimate the strength at the age of fresh concrete at the time of manufacturing fresh concrete. Now, to list the quantities required for estimating the age of the concrete, H and J (kg/al") are the cement water ratio of concrete and the strength at the specified age. 8T (kg/am") is the estimated strength, C5 (kg) is the actual measured value of cement, W5 (kg)
is the actual measured value of water, S! S (kg) aActual measurement value of fine aggregate flL%G 5 (kg) Actual measurement value of coarse aggregate,
M8 (16) is the surface water wheel of fine aggregate, MG (%) is the surface water wheel of coarse aggregate, and WCR is the water-cement ratio determined from the actual measured value. The water-cement ratio WCR and the estimated strength IjIL are calculated using the following formula (%). Information can be stored in advance in the computer according to the type of material, for example, lightweight concrete, river gravel; concrete, crushed concrete cape, admixture used, cement type used, etc. In this way, it is manufactured in a ready-mixed concrete factory;
Before transporting to the delivery location, the strength of the concrete is determined according to the specified material regulations! Being able to estimate is extremely effective for quality control for ready-mixed concrete manufacturers, early strength determination, and quality assurance for ready-mixed concrete buyers. In addition, when the water-cement ratio WCR obtained from the actual measured value is compared with the water-cement ratio calculated from the initial setting value 8 stored in advance in the combination, the difference between the two is outside the predetermined range. In response to this abnormality, it is possible to detect the abnormality early by checking the measuring bottle and raw materials, investigate the cause, and take early action against the abnormality, thereby preventing malfunctions at the Yatsucha plant.
It exerts great power in strengthening the quality control of ready-mixed concrete. Surface water percentage of coarse aggregate and fine aggregate MG (96), M8 (
%) is also used for this strength estimation, but in this automatic measurement 16 of the surface water turbine, coarse aggregate and fine aggregate according to a predetermined mixing ratio of concrete to be manufactured are fed into a measuring bin. It is possible to measure at a speed that does not cause any hindrance to the production process of fresh concrete, and the measurement results can be obtained as electrical signals, resulting in a high measurement accuracy! ! ! ! If it satisfies the following conditions: it is capable of surface water rate correction, is capable of continuous operation for the production of expanded concrete, and has a durable measuring ring, it can be used as a poor measuring method. Can be applied.

#! Implementation in Figure 2 □Example Line Admixtures t - Not Enriched; This is shown for concrete, but the same treatment is possible for concrete mixed with admixtures ffl.p
, for example, if the amount of mixed materials is fixed for the amount of 7-mention, etc., the measurement setting value of Ryu-mento after mixing amount correction C4 (kg), 1@shi concrete mix) mixing amount V(
−), etc. can be calculated.

Furthermore, in the above embodiment, the information from the weighing bin was used to perform the arithmetic processing to ensure accuracy, but instead of the measuring bin, information was used from the storage bin that supplies raw materials to this weighing bin. Correct calculations are also possible.

Although this practical example describes the modified blending of raw materials for 1 kneading p, it is of course possible to continue to use this blending result by the arithmetic processor 11 for the blending ratio of raw materials for <1411p.

As explained above, according to the present invention, the information obtained from the raw materials, the information obtained from the mixed ready-mixed concrete, and the information obtained from the ready-mixed concrete production conditions are used to determine the raw materials for each kneading process. The mixing ratio of water is automatically controlled by calculation processing of information.
It is possible to obtain ready-mixed concrete with the required quality such as value, water-cement ratio, etc., and computer-based calculation processing saves labor during ready-mixed concrete production, automatically corrects the mixing ratio, and controls the quality of ready-mixed concrete. The effect on warranty is extremely large.

[Brief explanation of drawings]

Figure 111 is an explanatory diagram showing an example of the operating status of a weighing device and a mixer in a batcher plant for producing ready-mixed concrete, #l2rEJ is a block diagram showing an embodiment of the method for producing ready-mixed concrete according to the present invention, and Figure 3 is a diagram showing a measuring bin. Figure 4 shows the configuration diagram of the aggregate surface water turbine measuring device〇-example.
The following graph shows a comparative example of the surface water ratio, and No. 5rIA is a configuration diagram showing the device for measuring the slump value.
Figure 2 shows the device and conventional slump value measurement results.
It is 7. In the drawing, 1 is the specified strength, 2 is the specified spring value, 3 is the specified air amount, 4 is the seed pot of Funkrete, 5 is the mixing amount, 6 is the maximum dimension of coarse aggregate, 7 is the operation panel, , 8 Line cutting time setting value, 9 is unit amount correction/correction calculation, 91 is aggregate amount correction based on aggregate surface water percentage, 92 is cement thickness correction 1, 93.94, 95.96 is water amount correction, 10 is unit amount Correction setting value, 11 is volume correction setting value, 12 is measurement setting value, 13 is actual measurement value, 16 Automatic measurement of aggregate surface water percentage. 17 is automatic measurement of slump value, 18 is strong l [estimation, 19 is automatic measurement of sludge #11 degree, and 20 is automatic measurement of concrete and cement temperature. 82

Claims (1)

[Claims] (11) A method for producing ready-mixed concrete in which raw materials in a storage bottle are supplied to a measuring bottle and weighed, and then a single material in the measuring bottle is discharged into a mixer and mixed. The information obtained from the raw materials, the information obtained from the ready-mixed concrete mixed based on the previous measurement during the above-mentioned measurement, and the information obtained from the manufacturing conditions of the ready-mixed concrete determined in advance are performed during the above-mentioned measurement. A method for producing ready-mixed concrete in which the mixing ratio of the above-mentioned raw materials is corrected and the mixture ratio of the above-mentioned raw materials is corrected to provide a suitable needle cap. The method for producing ready-mixed concrete according to claim 1, which performs arithmetic processing to correct the weight of aggregate and the amount of water by (31) The information obtained from the raw material is the temperature of cement, The method for producing ready-mixed concrete according to claim 1, which performs a calculation process to correct the sludge concentration of the recovered water. (5) The information obtained from the ready-mixed concrete that has been kneaded and mixed based on the previous total 1 is based on the information obtained from the ready-mixed concrete that has been kneaded and is in a 7tt mixer. The method for producing ready-mixed concrete according to claim 1, wherein arithmetic processing is performed to correct the amount of water based on the difference between the measured slump value and the slump value obtained in advance. (6) Information obtained from the fresh concrete mixed based on the previous measurement; concrete temperature measured for the fresh concrete in the mixer after mixing and mixing; calculation processing to correct the water amount based on this concrete temperature. The method for producing fresh concrete according to claim 1. (7) Obtaining the water-cement ratio t- as the predetermined ready-mix concrete production conditions, and recovering the cement temperature f1 obtained from the raw material with respect to this water-cement ratio. Claim 1: The amount of cement is corrected by taking into account information on the sludge content of water, the s2ng value of fresh concrete kneaded based on the previous measurement, and the amount of water corrected based on the information on 11 degrees. The method for producing ready-mixed concrete as described in Section 8. (8) Production of ready-mixed concrete by supplying raw materials in a storage tank to a weighing tank and weighing them, and then discharging the raw materials in this measuring bottle into a building mixer and mixing them. In the method, information obtained from the raw materials during the above measurement, information obtained from the ready-mixed concrete mixed based on the amount of O needle during the above-mentioned measurement, and predetermined production conditions of the fresh concrete. Information and t During the above measurement, make calculation #1111, correct the above raw material 0@ = ratio, and calculate the appropriate needle amount [After performing this, calculate the water-cement ratio based on this appropriate needle amount, and calculate the water-cement ratio according to the specified material order created in advance. Strength and ζO Suiryument ratio and t
Comparison of ready-mixed concrete manufacturing methods.