CN102464478B - Ultralow-heat binder composition with high-temperature type latent-heat compound and method for lowering hydration heat of concrete by using same - Google Patents
Ultralow-heat binder composition with high-temperature type latent-heat compound and method for lowering hydration heat of concrete by using same Download PDFInfo
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- CN102464478B CN102464478B CN201010553364.4A CN201010553364A CN102464478B CN 102464478 B CN102464478 B CN 102464478B CN 201010553364 A CN201010553364 A CN 201010553364A CN 102464478 B CN102464478 B CN 102464478B
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Abstract
The invention relates to an ultralow-heat binder composition with a high-temperature type latent-heat compound and a method for lowering the hydration heat of concrete by using the ultralow-heat binder composition with the high-temperature type latent-heat compound, wherein the ultralow-heat binder composition is prepared by mixing an inorganic latent-heat compound having the phase transition temperature of 60 DEG C or higher, with a concrete binder through a premixing method. The invention provides the ultralow-heat binder composition which is prepared by mixing a 0.5-10 wt% compound selected from strontium-based latent-heat compound [Sr(OH)2 8H2O], barium-based latent-heat compound [Ba(OH)2 8H2O], magnesium-based latent-heat compound [Mg(NO3)2 6H2O] and ferrum-based latent-heat compound [Fe(NO3)2 6H2O], with a 100wt% ternary binder through the premixing method, wherein the ternary binder consists of 20-70 wt% I type ordinary Portland cement (OPC), 20-60 wt% blast furnace slag (BFS) and 10-60 wt% fly ash (FA); and the invention further provides the method for controlling the hydration heat of the concrete.
Description
Background technology
The present invention relates to a kind of ultralow thermal caking agent composition containing thering is the high temperature modification latent heat compound of controlling the required latent heat effect of concrete hydration heat, and reduce the method for concrete hydration heat with it.More particularly, the present invention relates to a kind of for control concrete hydration heat containing the ultralow thermal caking agent composition of high temperature modification latent heat compound, described compound is as barium based compound [Ba (OH)
28H
2o], magnesio compound [Mg (NO
3)
26H
2o], Fe-base compound [Fe (NO
3)
26H
2o] or strontium based compound [Sr (OH)
28H
2o], wherein said ultralow thermal caking agent composition can effectively be controlled concrete hydration heat by the latent heat effect of ultralow thermal caking agent composition, can reduce concrete thermal stress and improve concrete heat crack index (thermal cracking index); Also relate to the method that reduces concrete hydration heat with it.
Conventionally, because cast during building concrete structure is containing the concrete of a large amount of cement, concrete cement produces 200cal/g or more hydration heat in the hydro-combination process reacting with water.Due to this hydration heat, when the internal-external temperature difference of concrete structure increases, concrete thermal stress increases, and the concrete cracking risk being caused by temperature variation is increased.For controlling the existing method of hydration heat, comprise: pre-cooled method, wherein water or cooled with liquid nitrogen concrete material; With tube-cooled method, wherein water composite cooling pipe is embedded in concrete to reduce concrete hydration heat.Recently, Japan has developed retardant has been introduced to the technology in can the polymer capsule of thermal destruction, and has used it for and reduced concrete hydration heat.In Korea S, adopted by use and shaken the technology (Construction New Technology No.509) that capillary heat pipe disperses concrete hydration heat.
In above-mentioned prior art, pre-cooled method is effective when reducing hydration heat, but has because hydrolysis reduces concrete strength and uneconomic problem owing to using liquid nitrogen.Meanwhile, thus adopt the problem of water composite cooling pipe method to be to cause on the pipe of stress concentration in being embedded in concrete cracking.It is problematic in that the error of burying interval due to pipe, be difficult to obtain uniform temperature dispersion, now can produce retroaction.In addition, thus adopting the method for water composite cooling pipe to have improves the problem that building cost reduces economical efficiency.
The technology that retardant is introduced in polymer capsule is a kind of method that reduces concrete hydration heat by slowing down hydration rate.In this technology, when polymer capsule is introduced in concrete, polymer wall can be due to impaired with the collision of aggregate, and exist because polymer capsule is to be used on a small quantity, is difficult to guarantee the equally distributed problem of polymer capsule.Particularly, exist and require to adopt hi-tech to prepare polymer capsule, thereby improved production cost, and the problem that occurs honeycomb in concrete solidification process.Due to these problems, consider place suitability and economical efficiency, this technology is used hardly.
In above-mentioned technology, Korean Patent Registration number 0683131 discloses for concrete phase change material and preparation method thereof.This patent is characterised in that the cream type microencapsulated phase change material for reducing concrete hydration heat, and it is by the paraffin as organic latent heat material, nonionogenic tenside, anion surfactant and water are mixed and prepared.The advantage of above-mentioned patent is, when phase change material is applied to concrete, it has reduced concrete hydration heat and has improved concrete initial strength.On the other hand, its problem is that preparation method is complicated and expensive.Owing to there being anion surfactant, cream type microencapsulated phase change material is improved to concrete affinity, but because it is compared with concrete and has low-down proportion, it can be floating during concrete mixing process.The expensive of cream type microcapsule containing phase change material also can be limited its application, and described microcapsule also can form burden to building on-site.
In addition, owing to before concrete depositing, the concussion capillary heat pipe being made of copper (diameter 4.0mm and internal diameter 2.8mm) being placed between steel bar, use heat pipe to disperse technology existing problems aspect building complicacy and economical efficiency of hydration heat.
Summary of the invention
Therefore, made the present invention to solve the problems referred to above that exist in this area, and embodiment of the present invention relate to a kind of for control concrete hydration heat containing the ultralow thermal caking agent composition of high temperature modification latent heat compound, wherein said ultralow thermal caking agent composition for example, by by transformation temperature being 60 ℃ or higher high temperature modification latent heat compound (barium based compound [Ba (OH)
28H
2o], magnesio compound [Mg (NO
3)
26H
2o], Fe-base compound [Fe (NO
3)
26H
2o] or strontium based compound [Sr (OH)
28H
2o]) prepare with ternary low-heat binding agent premix, and demonstrate the effect that reduces concrete hydration heat, guarantee good concrete workability simultaneously, and compare with not adding the concrete mix of described high temperature modification latent heat compound, can improve concrete compressive strength.
Another embodiment of the present invention relates to a kind of ultralow thermal caking agent composition, its by by high temperature modification latent heat compound with by preparing with the low-heat binding agent premix that the alternative a part of cement of flyash (FA) or blast-furnace slag (BFS) obtains, and it can be by show the latent heat effect control concrete hydration heat of heat absorption and release characteristic when reaching transformation temperature, and can reduce concrete thermal stress and concrete hot crack index is improved.
Another embodiment of the present invention relates to a kind of use and containing the ultralow thermal caking agent composition of high temperature modification latent heat compound, reduces the method for concrete hydration heat, wherein said ultralow thermal caking agent composition by by high temperature modification latent heat compound with by preparing with the low-heat binding agent premix that the alternative a part of cement of flyash (FA) or blast-furnace slag (BFS) obtains, and be used in ready mixed concrete whipping device (B/P) thus in the mode identical with general concrete, produce concrete the concrete of production can be poured into a mould in construction site.
According to embodiment of the present invention, a kind of ultralow thermal caking agent composition containing high temperature modification latent heat compound is provided, wherein said ultralow thermal caking agent composition is that the high temperature modification latent heat compound of 40～82cal/g is mixed and prepared by premix method with the ternary binding agent of 100wt% by being that 60 ℃～90 ℃ and latent heat holds by the transformation temperature of 0.5～10wt%, and wherein said ternary binding agent comprises the flyash (FA) of the I type normal portland cement (OPC) of 20～70wt%, the blast-furnace slag (BFS) of 20～60wt% and 10～60wt%.
Described high temperature modification latent heat compound can be by strontium base latent heat compound [Sr (OH)
28H
2o] form, or by the strontium base latent heat compound [Sr (OH) as main raw material
28H
2o] and be selected from barium base latent heat compound [Ba (OH)
28H
2o], magnesium base latent heat compound [Mg (NO
3)
26H
2o] and iron-based latent heat compound [Fe (NO
3)
26H
2o] at least one compound form.
In another embodiment, described high temperature modification latent heat compound can be preferably by by strontium base latent heat compound [Sr (OH)
28H
2o] as main raw material be selected from barium base latent heat compound [Ba (OH)
28H
2o], magnesium base latent heat compound [Mg (NO
3)
26H
2o] and iron-based latent heat compound [Fe (NO
3)
26H
2o] at least one compound and the mixing latent heat compound prepared.Herein, mix latent heat compound can be preferably by by 50～99 weight part strontium base latent heat compounds with in 1～50 weight part barium base latent heat compound, magnesium base latent heat compound and iron-based latent heat compound, any mixes and prepares.
According to another embodiment of the present invention, provide a kind of use containing the ultralow thermal caking agent composition of high temperature modification latent heat compound, to reduce the method for concrete hydration heat, described method comprises the steps: 1) will be selected from strontium base latent heat compound [Sr (OH)
28H
2o], barium base latent heat compound [Ba (OH)
28H
2o], magnesium base latent heat compound [Mg (NO
3)
26H
2o] and iron-based latent heat compound [Fe (NO
3)
26H
2o] any compound mix to obtain mixture with any component of the ternary binding agent being formed by I type normal portland cement (OPC), blast-furnace slag (BFS) and flyash (FA), wherein the latent heat compound amount that to take based on 100wt% ternary binding agent be 0.5～10wt% is mixed; And 2) mixture is mixed to obtain ultralow thermal caking agent with all the other components of described ternary binding agent, use described ultralow thermal caking agent to produce concrete, and the concrete of production is poured into a mould in construction site.
According to above method, for building the concrete hydration heat energy of large volume concrete structural, controlled, reduce thus thermal stress and hot crack index is improved.
Brief description
Fig. 1 is for showing the chart of the adiabatic hydration heat test result of low-heat concrete (numbering 1) and ultralow hot concrete (numbering 2～5).
Fig. 2 (adopts MIDAS/Genw finite element analysis technology for showing by hydration heat analysis; The chart of the analytical results of the temperature cracking index 1/4 model) obtaining.
The chart of Fig. 3 for showing the low-heat concrete (numbering 1) of prior art and containing the test result by adding the slump of the ultralow hot concrete of the present invention (numbering 2～5) of ultralow thermal caking agent prepared by high temperature modification latent heat compound to pass in time to change.
The chart of Fig. 4 for showing the low-heat concrete (numbering 1) of prior art and containing the test result by adding the air content of the ultralow hot concrete of the present invention (numbering 2～5) of ultralow thermal caking agent prepared by high temperature modification latent heat compound to pass in time to change.
Fig. 5 is for showing the chart of low-heat concrete (numbering 1) and ultralow hot concrete (numbering 2～5) compressive strength test result.
Specific embodiments is described
Above-mentioned purpose, feature and advantage will become clearer by detailed Description Of The Invention below.Below with reference to the accompanying drawings the preferred embodiments of the invention are described in detail.
Using the ultralow thermal caking agent composition containing high temperature modification latent heat compound of the present invention to reduce in the method for concrete hydration heat, ultralow thermal caking agent is applied to concrete with by showing the concrete hydration heat of latent heat effect control of heat absorption and release characteristic, thereby reduce thermal stress and improve hot crack index, described ultralow thermal caking agent is by for example, by high temperature modification latent heat compound (barium based compound [Ba (OH)
28H
2o], magnesio compound [Mg (NO
3)
26H
2o], Fe-base compound [Fe (NO
3)
26H
2o] and strontium based compound [Sr (OH)
28H
2o]) mix and obtain with ternary low-heat binding agent.
According to the present invention, described ultralow thermal caking agent composition is also standby by premix legal system, wherein described high temperature modification latent heat compound is mixed with any component of described ternary low-heat binding agent.The ultralow thermal caking agent composition of preparation, for producing concrete at ready mixed concrete whipping device (B/P) in the mode identical with general concrete, is poured into a mould the concrete of production in construction site, can be improved concrete workability thus.
Ultralow thermal caking agent of the present invention is that the high temperature modification latent heat compound of 40～82cal/g is mixed and prepared by premix method with 100wt% ternary binding agent by being that 60 ℃～90 ℃ and latent heat holds by the transformation temperature of 0.5～10wt%, and wherein said ternary binding agent comprises the flyash (FA) of the I type normal portland cement (OPC) of 20～70wt%, the blast-furnace slag (BFS) of 20～60wt% and 10～60wt%.
In embodiments of the invention, described high temperature modification latent heat compound is generally white crystalline powder form.
According to first embodiment of the invention, described high temperature modification latent heat compound can be only by strontium base latent heat compound [Sr (OH)
28H
2o] form.
According to second embodiment of the invention, described high temperature modification latent heat compound can be by being selected from strontium base latent heat compound [Sr (OH)
28H
2o], barium base latent heat compound [Ba (OH)
28H
2o], magnesium base latent heat compound [Mg (NO
3)
26H
2o] and iron-based latent heat compound [Fe (NO
3)
26H
2o] any compound form.
According to third embodiment of the invention, described high temperature modification latent heat compound can be comprised of mixing cpd, and described mixing cpd is by the strontium base latent heat compound [Sr (OH) as main ingredient
28H
2o] and be selected from barium base latent heat compound [Ba (OH)
28H
2o], magnesium base latent heat compound [Mg (NO
3)
26H
2o] and any compound of iron-based latent heat compound form.
Third embodiment of the invention provide a kind of by by any barium of the described strontium base latent heat compound of 55～99 weight parts and 1～50 weight part-, magnesium-and structure of obtaining of iron-based latent heat compound premix.
Ratio of mixture about latent heat compound, if by be less than any barium of 1 weight part-, magnesium-and the described strontium base latent heat compound of iron-based latent heat compound and 55～99 weight parts, the effect that prevents concrete slump loss and improve concrete strength will be inadequate; If by be greater than any barium of 50 weight parts-, magnesium-and iron-based latent heat compound and described strontium base latent heat compound, the effect that strontium base latent heat compound reduces concrete hydration heat will reduce.
Term used herein " premix method " refers to a kind of method, wherein, by normal portland cement (OPC), flyash (FA) and blast-furnace slag (BFS) are mixed in the technological process with preparation ternary binding agent (so-called " low-heat binding agent "), add strontium base latent heat compound [Sr (OH)
28H
2o], barium base latent heat compound [Ba (OH)
28H
2o], magnesium base latent heat compound [Mg (NO
3)
26H
2o] and iron-based latent heat compound in any powder compound, and mix with any raw material that is selected from normal portland cement (OPC), flyash (FA) and blast-furnace slag (BFS), then evenly mix with all the other components of described ternary binding agent, thereby preparation is containing the ultralow thermal caking agent of high temperature modification latent heat compound.
When the amount that high temperature modification latent heat compound be take based on 100wt% ternary binding agent is 0.5～10wt% is mixed with described ternary binding agent, it shows the performance of absorbing heat when being liquid phase by solid transformation, until because the increase of cement hydration heat makes it reach transformation temperature.Based on this reason, it can suppress the increase of concrete hydration heat and reduce hydration heat.Equally, in transformation temperature by ultralow thermal caking agent, reduce in the method for hydration heat, its when reaching by liquid phase to the transformation temperature of solid phase, releases heat.Therefore, can effectively control concrete hydration heat by preventing the hot fast reducing of concrete hydration.
Especially, according to the present invention, due to by premix method by high temperature modification latent heat compound administration in ternary low-heat binding agent, do not need independent preparation technology and finishing technique.In addition, compare with using the prior art of polymer capsule, the present invention is economical, and this is because production cost is low and the consumption of high temperature modification latent heat compound is little.The invention has the advantages that, because high temperature modification latent heat compound has the proportion that is greater than 1.50, this proportion than organic latent heat compound is higher, and they are not floating and can guarantee to have excellent consistency with concrete in concrete production process.If the ternary binding agent that high temperature modification compound be take based on 100 weight parts adds as being less than the amount of 0.5wt%; the effect of controlling concrete hydration heat will be inadequate; if added to be greater than the amount of 10wt%; it will improve concrete air content and reduce concrete intensity; therefore be difficult to guarantee concrete physicals; and because its consumption increases, will cause adhesive composition cost to increase.
If I type normal portland cement (OPC) adds to be less than the amount of 20wt%, concrete basicity and initial strength will reduce, if added to be greater than the amount of 70wt%,, due to the excessive use of cement, need to improve the consumption of latent heat compound effectively to control concrete hydration heat.
If blast-furnace slag (BFS) adds to be less than the amount of 20wt%; concrete pozzolanic activity will be inadequate, therefore be difficult to guarantee concrete intensity, if added to be greater than the amount of 60wt%; concrete basicity will reduce, thereby cause concrete to neutralize in early days.
If flyash (FA) adds to be less than the amount of 10wt%; concrete pozzolanic activity will be inadequate; and with regard to raw materials cost, will be uneconomic (it is economic that flyash (FA) is compared with blast-furnace slag (BFS) with normal portland cement (OPC)); if added to be greater than the amount of 60wt%, be difficult to guarantee concrete initial strength and can cause concrete neutralization.
Even when containing by by barium base latent heat compound [Ba (OH)
28H
2o], magnesium base latent heat compound [Mg (NO
3)
26H
2o] and iron-based latent heat compound [Fe (NO
3)
26H
2o] any and strontium base latent heat compound [Sr (OH)
28H
2o] the ultralow thermal caking agent of the mixing latent heat compound that is obtained by mixing is while being applied to concrete, and it also has active effect to concrete processability (air content and slump-loss).That is, the concrete containing ultralow thermal caking agent has the physicals suitable with the concrete that does not add ultralow thermal caking agent.It also can effectively reduce concrete hydration heat and have the increase of hydration heat speed or the effect of reduction of suppressing.
Below will be by following examples, by technology of the present invention and low-heat binding agent are compared, to controlling the effect of concrete physicals and hydration heat, be described, wherein in technology of the present invention, high temperature modification latent heat compound added in the low-heat binding agent being comprised of ternary binding agent.
Embodiment
To describe the ultralow thermal caking agent containing high temperature modification latent heat compound with latent heat effect of the present invention in detail now, and control the performance of concrete physical and hydration heat.
According to hybrid standard 25-24-21, (maximum particle size that represents aggregate used in concrete mixing is 25mm, the design strength of 28 days is 24MPa and represents that the slump of mobility is 21em), by the concrete physicals of control shown in the embodiment of the present invention and comparative example checking following table 1 and the performance of hydration heat.
Table 1
The maximum particle size of ※ coarse grain: 25mm, standard intensity: 24.0MPa, the slump: 18 ± 2.5cm
The low-heat concrete (number 1) of comparative example for containing the existing ternary low-heat binding agent being formed by 40wt% normal portland cement (OPC), 40wt% blast-furnace slag (BFS) and 20wt% flyash (FA).The embodiment of the present invention is the ultralow hot concrete (numbering 2～5) that contains ultralow thermal caking agent, and described ultralow thermal caking agent is passed through the barium based compound of 2.75wt% [Ba (OH)
28H
2o], magnesio compound [Mg (NO
3)
26H
2o], Fe-base compound [Fe (NO
3)
26H
2o] and strontium based compound [Sr (OH)
28H
2o] mix and prepare by premix method with the described ternary low-heat concrete (being formed by 40wt% normal portland cement (OPC), 40wt% blast-furnace slag (BFS) and 20wt% flyash (FA)) of 100wt% separately.
Fig. 1 is for showing the chart of the adiabatic hydration heat test result of described low-heat concrete (numbering 1) and described ultralow hot concrete (numbering 2～5).Test is by Earthquake Engineering Group, Environment & Structure Laboratory, and Korea Power Electric ResearchInstitute carries out.In addition, (by MARUI Co.LTD, Japan manufactures this test use heat adiabatic temperature rise tester;
capacity: 50L) carry out.
As can be seen from Figure 1, compare with the low-heat concrete (numbering 1) containing low-heat binding agent, the hydration heat (K) that contains the ultralow hot concrete of ultralow thermal caking agent reduces greatly.Wherein, the concrete hydration heat containing described strontium based compound or barium based compound reduces amplitude maximum.
Table 2
| Maximum adiabatic temperature (K, ℃) | Speed of reaction (α) | |
| Comparative example (numbering 1) | 60.9 | 0.954 |
| Embodiment (numbering 2) | 48.6 | 0.592 |
| Embodiment (numbering 3) | 52.6 | 0.752 |
| Embodiment (numbering 4) | 51.6 | 0.685 |
| Embodiment (numbering 5) | 45.6 | 0.487 |
The concrete of comparative example (numbering 1) and containing strontium based compound [Sr (OH)
28H
2o] and the maximum adiabatic temperature value of concrete (numbering 5) and the speed of reaction value that in above test-results, show the embodiment of the most excellent reduction hydration heat effect be used to determine hot crack index.Hot crack index is under the analysis condition of following table 3, in main body unit (subject member) (size: 28 * 18 * 3.5m) upper by the (finite element analysis technology of employing MIDAS/Genw of the hydration heat analysis shown in Fig. 2; 1/4 model) determine.
Table 3
Measure the hot crack index in main body unit, the results are shown in Figure 2.As can be seen from Figure 2, the hot crack index of comparative example (numbering 1) is approximately 0.75.On the other hand, the concrete (numbering 5) that contains the embodiment of described strontium based compound demonstrates the hot crack index that is greater than 1.2, the hot crack index of standard of the mass concrete of recommending in the concrete standard specification providing according to Korea S construction the Ministry of Communications, will be restricted lower than this value.
Then measure and there is the composition of upper table 1 and corresponding to concrete workability and the curing performance of comparative example and the embodiment of the present invention, measuring result is shown in Fig. 3～5.
Fig. 3 shows the chart comprise the low-heat concrete (numbering 1) of existing low-heat binding agent and to comprise the test result that the slump of the ultralow hot concrete (numbering 2～5) of the ultralow thermal caking agent that contains high temperature modification latent heat compound passs in time.
Fig. 4 shows the chart comprise the low-heat concrete (numbering 1) of existing low-heat binding agent and to comprise the test result that the air content of the ultralow hot concrete (numbering 2～5) of the ultralow thermal caking agent that contains high temperature modification latent heat compound is passed in time.
Fig. 5 is the chart that shows the compressive strength test result of low-heat concrete (numbering 1) and ultralow hot concrete (numbering 1～5).
The slump and the air content (processability) of the ultralow hot concrete of test the present invention.It the results are shown in Figure 3 and 4, can find out with the concrete mix that adds existing low-heat binding agent (numbering 1 in Fig. 3) and compare, and the variation that the slump of ultralow hot concrete (numbering 2～5 of Fig. 3) passs in time slightly improves.The air content of the concrete mix of numbering 1～5 is also similar.
From the above-mentioned test result of fresh concrete, can find, contain by adding the workability of ultralow hot concrete of ultralow thermal caking agent prepared by high temperature modification latent heat compound of the present invention similar to existing low-heat concrete mixed material, therefore the ultralow thermal caking agent containing high temperature modification latent heat compound does not affect concrete workability.
Test the compressive strength of ultralow hot concrete of the present invention.As shown in Figure 5, ultralow hot concrete showed and equates with existing low-heat concrete or higher intensity result in the time of 3,7 and 27 days.
As mentioned above, the present invention has following effect:
First, by adopting premix method to add, be selected from strontium base latent heat compound [Sr (OH)
28H
2o], barium base latent heat compound [Ba (OH)
28H
2o], magnesium base latent heat compound [Mg (NO
3)
26H
2o] and iron-based latent heat compound [Fe (NO
3)
26H
2o] at least one compound and the ultralow thermal caking agent prepared does not need independent preparation and finishing technique.
Secondly, ultralow thermal caking agent of the present invention is more more economical than existing IV type cement with regard to raw material, and the concrete that contains described ultralow thermal caking agent can pour into a mould by integrated poured mode, and this compares at economic aspect with subregion cast is favourable.
The 3rd, because it has excellent latent heat effect, ultralow thermal caking agent of the present invention can suitably be controlled concrete hydration heat to alleviate thermal stress, thereby improves concrete hot crack index.
The 4th, even when the ultralow thermal caking agent containing high temperature modification latent heat compound is applied to concrete, its do not damage workability (as the variation of the slump and air content) and solidify after physicals (for example compressive strength), and can improve concrete physicals.
The 5th, high temperature modification latent heat compound of the present invention has the proportion that is greater than 1.5, and this proportion than organic latent heat compound is higher, therefore not floating in concrete production process, and can guarantee to have excellent consistency with concrete.
The 6th, according to the present invention, concrete workability can be by adopting premix legal system to be improved for ultralow thermal caking agent, wherein high temperature modification latent heat compound is mixed with any component in ternary low-heat binding agent, in ready mixed concrete whipping device (B/P), in the mode identical with general concrete, use the ultralow thermal caking agent of preparation to produce concrete, and the concrete of production is poured into a mould in construction site.
Although specific embodiment of the invention scheme is described with reference to accompanying drawing, but to those skilled in the art, under the spirit and scope of the invention not departing from defined in following claim, the present invention is made variously substitute, variation and modification be all apparent.
Claims (5)
1. the ultralow thermal caking agent composition containing high temperature modification latent heat compound, wherein said ultralow thermal caking agent composition is that the high temperature modification latent heat compound of 40～82ca1/g mixes and prepares with 100wt% ternary binding agent by adopting premix method to be that 60 ℃～90 ℃ and latent heat holds by 0.5～10wt% transformation temperature, and described ternary binding agent comprises 20～70wt%I type normal portland cement (OPC), 20～60wt% blast-furnace slag (BFS) and 10～60wt% flyash (FA);
Wherein said high temperature modification latent heat compound is for passing through the strontium base latent heat compound [Sr (OH) of 50～99 weight parts
28H
2o] as at least one of main raw material and 1～50 weight part, be selected from barium base latent heat compound [Ba (OH)
28H
2o], magnesium base latent heat compound [Mg (NO
3)
26H
2o] and iron-based latent heat compound [Fe (NO
3)
26H
2o] compound and the mixing latent heat compound prepared.
2. according to the ultralow thermal caking agent composition of claim 1, wherein said ultralow thermal caking agent composition is prepared by the following method, described method comprises: by any compound premix of high temperature modification latent heat compound and ternary binding agent to obtain mixture, wherein the high temperature modification latent heat compound amount that to take based on 100wt% ternary binding agent be 0.5～10wt% is mixed, and described mixture is mixed with all the other components of ternary binding agent.
3. use reduces a method for concrete hydration heat containing the ultralow thermal caking agent composition of high temperature modification latent heat compound, and described method comprises the steps:
By strontium base latent heat compound [Sr (OH)
28H
2o] as main ingredient be selected from barium base latent heat compound [Ba (OH)
28H
2o], magnesium base latent heat compound [Mg (NO
3)
26H
2o] and iron-based latent heat compound [Fe (NO
3)
26H
2o] at least one compound to obtain mixing high temperature modification latent heat compound, by described mixing high temperature modification latent heat compound with any component premix of the ternary binding agent that formed by I type normal portland cement (OPC), blast-furnace slag (BFS) and flyash (FA) to obtain mixture, the amount mixing that the ternary binding agent that wherein said mixing high temperature modification latent heat compound be take based on 100wt% is 0.5～10wt%; With
Described mixture is mixed to obtain ultralow thermal caking agent with all the other components of binding agent, use described ultralow thermal caking agent to produce concrete, and described ultralow thermal caking agent is poured into a mould in construction site.
4. according to the method for claim 3, wherein said mixing latent heat compound is by mixing any of barium base latent heat compound, magnesium base latent heat compound and the iron-based latent heat compound of the strontium base latent heat compound of 50～99 weight parts and 1～50 weight part to prepare.
5. according to the method for claim 3 or 4, wherein said ternary binding agent is by the compositions of mixtures of 20～70wt%I type normal portland cement (OPC), 20～60wt% blast-furnace slag (BFS) and 10～60wt% flyash (FA).
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|---|---|---|---|
| CN201010553364.4A CN102464478B (en) | 2010-11-18 | 2010-11-18 | Ultralow-heat binder composition with high-temperature type latent-heat compound and method for lowering hydration heat of concrete by using same |
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|---|---|---|---|
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|---|---|
| CN102464478A CN102464478A (en) | 2012-05-23 |
| CN102464478B true CN102464478B (en) | 2014-02-26 |
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| GB201420766D0 (en) | 2014-11-21 | 2015-01-07 | Bpb United Kingdom Ltd | Fire resistant calcium sulphate-based products |
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| GB201420768D0 (en) | 2014-11-21 | 2015-01-07 | Bpb United Kingdom Ltd | Calcium sulphate-based products |
| CN108975735B (en) * | 2018-09-05 | 2020-08-14 | 华电电力科学研究院有限公司 | Energy storage geopolymer and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101074157A (en) * | 2007-06-08 | 2007-11-21 | 王胜怀 | Self-controlled phase-variable energy-storage economical material and its production |
| KR20070115851A (en) * | 2007-11-16 | 2007-12-06 | 신한건설산업(주) | A mixture for concrete mortar with insulation, thermal storage and intensity increase function |
| KR100802988B1 (en) * | 2007-04-26 | 2008-02-14 | 대림산업 주식회사 | Composition of premixed type - ultra low heat binder with latent heat property and method for reducing hydration heat of concrete using it |
| CN101857412A (en) * | 2010-05-19 | 2010-10-13 | 陈耕 | Multifunctional gypsum painting ready mixed mortar as well as preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100802988B1 (en) * | 2007-04-26 | 2008-02-14 | 대림산업 주식회사 | Composition of premixed type - ultra low heat binder with latent heat property and method for reducing hydration heat of concrete using it |
| CN101074157A (en) * | 2007-06-08 | 2007-11-21 | 王胜怀 | Self-controlled phase-variable energy-storage economical material and its production |
| KR20070115851A (en) * | 2007-11-16 | 2007-12-06 | 신한건설산업(주) | A mixture for concrete mortar with insulation, thermal storage and intensity increase function |
| CN101857412A (en) * | 2010-05-19 | 2010-10-13 | 陈耕 | Multifunctional gypsum painting ready mixed mortar as well as preparation method and application thereof |
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