JP2001097749A - Method for automatic display of slump value of concrete loaded on one truck mixer car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for the automatic display of a slump value of concrete loaded on one truck mixer car capable of automatically and easily displaying the slump value of concrete of an amount corresponding to one truck mixer, kneaded by a concrete mixer in plural batches and discharged to a truck mixer car. SOLUTION: The relationship between the electric current of a concrete mixer and the slump value of the concrete is determined beforehand. The current of the concrete mixer is determined for each batch and stored in a computer. The current values of the batches stored in the computer are averaged when the data of the batch formulation, or the like, is not outputted for a period longer than the preset time necessary for the charging, kneading and discharging of the batch and the slump value of the truck mixer car is displayed from the relationship between the current value and the slump value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a truck mixer in which shotcrete of a tunnel is kneaded with a concrete mixer at a site plant, and the slump value of the concrete loaded in the truck mixer truck is automatically displayed for each truck mixer truck. The present invention relates to a method for automatically displaying slump value of concrete for one vehicle.

[0002]

2. Description of the Related Art Conventionally, in order to supply sprayed concrete for a tunnel, a concrete plant having a concrete mixer or the like is provided near a tunnel site to knead the concrete, and the kneaded concrete is loaded into a truck mixer truck. To the spraying site.

In this case, for concrete kneaded with a concrete mixer, it is necessary to display the hardness of the concrete as a slump value for each truck mixer truck.

On the other hand, it is known that the hardness of the concrete has a correlation between the current value of the load of the concrete mixer and the slump value of the concrete. In the method of the invention of JP-A-7-173998, the surface water ratio of the fine aggregate to be blended is determined based on the current value of the load driving the concrete mixer in order to obtain a predetermined concrete slump value. Automatic correction is performed by a predetermined amount from the data obtained in the test.

However, in this method, only the slump value of the set blend and the actually weighed blend is displayed for each batch of the concrete mixer, and it is necessary to know the slump value of one truck mixer truck. At the end of the kneading of the concrete plant, as shown in FIG. 5, an appropriate amount of concrete is dropped from a truck mixer truck 1 into a wheelbarrow 2, and as shown in FIG. By pulling out the cylindrical container 3 in a state where it is packed and placed on the ground, concrete 4
Has fallen around and the height of the tubular concrete has been reduced, and a test is performed to determine the difference in the height and detect the slump value.

Conventionally, such a slump test has to be performed at least once in the morning and in the afternoon at a construction site, and the test requires a great deal of trouble and displays each slump value based on these tests. Management was difficult.

[0007]

SUMMARY OF THE INVENTION As described above, the present invention reduces the number of tests for detecting a slump value, which is performed once in the morning and once in the afternoon on site, and can be performed in a plurality of batches by a concrete mixer. Automatically and easily displays the average slump value of concrete for one truck mixer car that is kneaded and released to the truck mixer car. Automatic display of concrete slump value for one truck mixer car. Provide a way.

[0008]

According to the present invention, the correlation between the current value of the load of the concrete mixer and the slump value of the concrete is determined, and the current value of each batch of the concrete mixer is measured and stored in a computer. When the batch input, kneading, batch mixing and other data is not output for a longer time than the time required for release,
Or, when the next batch is not weighed during the kneading, assuming that the concrete has been put into the truck mixer vehicle, the average work of the current value of each batch stored in the computer so far is performed, The method comprises an automatic slump value display method for concrete of one truck mixer vehicle which displays the slump value of the truck mixer vehicle from the correlation between the current value and the slump value.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for automatically displaying a slump value according to the present invention will be described below with reference to graphs and charts. Measure the load current value and concrete slump value,
The correlation between the current value and the slump value is determined in advance.

That is, at the site, the current value and the slump value at that time are measured at several points, a graph of the current value and the slump value of FIG. 1 is created, and then the current as shown in FIG. Create a correspondence table between the values and the slump values, and let the printing system recognize them.

Next, in this embodiment, as shown in FIG. 3, for each batch of the concrete mixer,
Mixing data consisting of time, mixing No., capacity and moisture correction rate, weight of sand S, weight of cement C, weight of water W, weight of gravel G, and weight of water reducing agent AD, and current value of concrete mixer and Output and print the slump value of concrete.

FIG. 4 shows, in a concrete mixer of a plant, the measurement and input of the weight of the sand S, the weight of the cement C, the weight of the water W, and the weight of the gravel G in each batch of concrete, and the mixing and kneading of the concrete. FIG. 4 is a cycle time diagram of the discharge of the concrete into the concrete mixer truck. After the concrete is discharged into the concrete mixer truck in a predetermined number of batches and the charging is completed, the material is not charged into the next batch. FIG. 4 shows a case where the water reducing agent AD is not used.

Therefore, from the input of a preset batch,
If the data such as the blending of the batch is not output for a longer time than the time required for kneading and discharging, it is assumed that the charging of the concrete mixer into the truck mixer vehicle has been completed and the current of each batch stored in the computer until then. By averaging the values and determining and displaying a slump value corresponding to the averaged current value from the correlation between the current value and the slump value, the current value can be automatically averaged, and the truck mixer can be averaged. The slump value of concrete for one car can be displayed.

Further, when the concrete is not charged into the concrete mixer truck, the material of the next batch is not weighed during kneading. Therefore, when the concrete is not weighed, the concrete is not charged into the concrete mixer truck. Assuming that the operation has been completed, the average value of the current value of each batch stored in the computer up to that time is averaged, and the slump value of the concrete of one truck mixer truck is displayed.

In FIG. 3, the fixed time is set to 5 minutes, and when a longer time has elapsed, one truck mixer truck, that is, from batch No. 13 to batch No. 22
In FIG. 3, the average value of the current value of one truck mixer vehicle is indicated by (31.2), and the slump value corresponding to the current value is indicated by 10.0.

As described above, according to the method for automatically displaying the slump value of concrete for one truck mixer truck according to the present invention, data such as batch compounding time longer than the time required for material input, kneading and discharging by the concrete mixer. When no output is obtained, or when the next batch is not weighed during the above-mentioned kneading, it is assumed that the concrete has been put into the concrete mixer truck, and the average work of the current value of each batch stored in the computer is performed. To do,
This makes it possible to automatically display the average of the slump values for one truck mixer vehicle.

[0017]

According to the method of the present invention described above,
Conventionally, a test for detecting a slump value once in the morning and once in the afternoon was required. However, the number of tests can be reduced and the number of workers can be reduced.

Further, the slump value of the concrete of one truck mixer truck can be automatically displayed as the average slump value of the amount of the concrete continuously kneaded in the number of batches kneaded within a predetermined time, The management of the slump value of the concrete used becomes easy.

[Brief description of the drawings]

FIG. 1 is a graph showing a correlation between a load current value of a concrete mixer and a slump value of concrete in one embodiment of a method for automatically displaying a slump value of the present invention.

FIG. 2 is a correspondence table between a current value and a slump value created from the graph of FIG. 1;

3 is a printing table of date, time, composition number, capacity, material composition, current value, and slump value for each batch of the concrete mixer in FIG.

FIG. 4 is a cycle time diagram of each batch of the concrete mixer of FIG. 3;

FIG. 5 is an explanatory view of an operation of dropping an appropriate amount of concrete from a conventional truck mixer truck for detecting its slump value.

FIG. 6 is an explanatory diagram of a slump value detection test of the concrete of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete mixer truck 2 Wheelbarrow 3 Cylindrical container 4 Concrete S Sand C Cement W Water G Gravel

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yasuhide Kogan 5 Toban Construction Industry Co., Ltd. 5 Yonbancho, Chiyoda-ku, Tokyo (72) Inventor Miyazaki Johtaro 5 Toa Construction Industry Co., Ltd. 5 Yonbancho, Chiyoda-ku, Tokyo (72) Inventor Katsutoshi Ochiai 2-133-1, Hara, Ogaki-shi, Gifu F-term (reference) 2D055 DB00 KA00 LA12 LA13

Claims (1)

[Claims] 1. A correlation between the current value of the load of the concrete mixer and the slump value of the concrete is determined in advance, the current value of each batch of the concrete mixer is measured, stored in a computer, and the preset batch When the input of concrete into the concrete mixer truck has been completed when data such as the blending of the batch is not output for a time longer than the time required for charging, kneading and discharging, or when the next batch is not weighed during the kneading. The average of the current value of each batch stored in the computer up to that point is averaged, and the slump value of the concrete mixer truck is displayed from the correlation between the current value and the slump value. Slump value automatic display method.