CN110627405A - Expansion material with slower reaction rate and preparation method thereof - Google Patents
Expansion material with slower reaction rate and preparation method thereof Download PDFInfo
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- CN110627405A CN110627405A CN201911057962.XA CN201911057962A CN110627405A CN 110627405 A CN110627405 A CN 110627405A CN 201911057962 A CN201911057962 A CN 201911057962A CN 110627405 A CN110627405 A CN 110627405A
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- regulating
- admixture
- sulphoaluminate
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- controlled release
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the field of building materials, and particularly relates to an expansion material with a slower reaction rate and a preparation method thereof. By bonding the traditional sulphoaluminate expanding agent and the regulating admixture together. The distribution of the regulating and controlling admixture in the expanding agent and the cement matrix is improved through the bonding effect of the adhesive, the concentration of the regulating and controlling admixture around the expanding agent particles is increased, only part of the regulating and controlling admixture can be diffused to the cement matrix, and therefore the regulating and controlling admixture can influence the hydration of the expanding agent rather than the hydration of the cement.
Description
Technical Field
The invention belongs to the field of building materials, and relates to an expansion material with a slower reaction rate and a preparation method thereof.
Background
Concrete cracks are the most common engineering diseases in engineering such as civil engineering, water conservancy and bridges, and more than 80 percent of cracks are deformation cracks, such as self-contraction, drying shrinkage and temperature shrinkage.
At present, various additives are used for reducing the shrinkage of concrete, for example, Chinese patent CN 200710053035.1 discloses that the shrinkage is reduced by internal curing of water-absorbent resin. Chinese patent cn201410010473.x discloses a material for regulating and controlling cement hydration, further controlling temperature rise and reducing temperature shrinkage.
In addition, the expansion component generates volume expansion in the hydration process to compensate the shrinkage of the cement-based material, and the method is also a common technical means for solving the shrinkage and cracking of concrete. There are several types of swelling agents currently on the market: 1) sulphoaluminate type expanding agents; 2) calcium oxide-based swelling agents; 3) a magnesium oxide based expanding agent. The chemical components of the expanding agents are different, the expansion characteristics are different, the sulphoaluminate expanding agent mainly generates ettringite, and calcium oxide and magnesium oxide respectively form calcium hydroxide and magnesium hydroxide. Compared with the calcium oxide, sulphoaluminate and magnesium oxide expanding agents, the expansion energy and the expansion speed are reduced in sequence, but the hydration reaction of the expanding agent is accelerated by the temperature, so that the reaction speed is improved.
In an actual concrete structure, due to the hydration and heat release of cement, the concrete structure can generate a temperature rise and temperature drop process. In the temperature rise stage, due to the principle of expansion with heat and contraction with cold, even under the condition of large early self-contraction, the concrete generally shows expansion and is not easy to crack; however, in the temperature reduction stage, the concrete is easy to crack due to the fact that the temperature reduction shrinkage is generally large and the self-shrinkage, the dry shrinkage and the like are superposed. Therefore, the concrete shrinkage cracking is to be solved, and the optimal scheme is that the expansion generated by the hydration reaction of the expanding agent is matched with the shrinkage of the concrete, namely the hydration rate of the expanding agent is reduced, so that the expansion moves backwards and is generated at the stage of concrete temperature reduction as much as possible.
In order to solve the problem of too high expansion speed of the calcium oxide expanding agent, Chinese patent CN201510060657.1 discloses a method for modifying calcium oxide expanding clinker, which is to form a large amount of compact calcium carbonate on the surface of calcium oxide expanding clinker powder to prepare the modified calcium oxide expanding clinker. Obviously improves the expansion amount and the expansion stress of the expansion clinker generated in the cement concrete and optimizes the expansion process of the expansion clinker and the expansion agent thereof; the weathering resistance and the moisture resistance of the calcium oxide expansion clinker and the expanding agent thereof are improved.
Chinese patent CN200510019477.5 discloses a material combining the three types of swelling sources, UEA and CAS are used to provide early swelling and MgO is used to provide late swelling, but the patent does not consider the acceleration effect of temperature on the hydration of swelling agent.
Chinese patent CN201310359215.8 discloses a composite expanding agent for inhibiting temperature rise at early stage and promoting hydration at later stage and a preparation method thereof, and the main principle is that the composite expanding component can react at early stage, middle stage and later stage of hydration to generate expansion by reasonably matching the mixing amount of light-burned calcium oxide, sulphoaluminate cement clinker, anhydrite and over-burned magnesium oxide.
The invention discloses a modified calcium oxide expanding agent with controllable expansion process and a preparation method thereof, wherein the modified calcium oxide expanding agent is prepared by coating calcium oxide clinker with rosin resin acid and then uniformly mixing the calcium oxide clinker with a coagulation regulating component, wherein the mass ratio of the calcium oxide clinker to the rosin resin acid to the coagulation regulating component is (990 ~ 996): 2 ~): 2.
In research and engineering application, although the technology improves the swelling course of the swelling agent to some extent, the technology still has a plurality of problems: 1) the expansion energy loss of the expanding agent is still large under severe environments such as high mold-entering temperature, high temperature rise and the like. 2) When the expansion course of the expanding agent is regulated and controlled by the additive, in order to increase the performance and increase the dosage of the additive, the hydration of cement is greatly influenced, and the expansion effect of the expanding agent can be reduced.
Disclosure of Invention
Aiming at the problem that the expansion efficiency cannot be fully exerted because the expansion agent expands too fast when the temperature rise and the temperature drop of the concrete are relatively quick in the existing coating type expansion agent, the invention provides a regulating and controlling additive with a slow and controlled release function and application thereof in preparing an expansion material with a relatively slow reaction rate.
The regulating admixture with the sustained and controlled release function is a modified regulating admixture prepared by a sustained release technology, and is prepared by mixing water, the regulating admixture and pregelatinized starch into a homogeneous solution and then spray drying.
The regulating and controlling additive is capable of regulating and controlling hydration of sulphoaluminate minerals and is one or more of boric acid, borax, tannic acid and dextrin.
In the preparation process of the regulating and controlling admixture with the controlled release capability, the proportion of the regulating and controlling admixture in the total solid phase mass is 20-40%. In the preparation process of the regulating and controlling additive with controlled release capacity, the integral solid content is controlled to be 25-50%.
The application of the regulation and control admixture with the sustained and controlled release function is used for preparing a modification liquid, and the modification liquid is used for modifying an expansion material so as to slow down the expansion process of the expansion material.
The modified liquid consists of a regulating additive, an adhesive and a dispersion medium;
the mass ratio of the regulating admixture to the adhesive in the regulating admixture with the sustained and controlled release function is (1-25): (25-100);
the adhesive is ethyl cellulose.
The dispersion medium is methanol or ethanol.
The expansion material before modification is an inorganic substance containing sulphoaluminate minerals and is selected from one or more of sulphoaluminate crystals, sulphoaluminate cement and sulphoaluminate expansion clinker.
The intumescent material may also contain gypsum, wherein the ratio of gypsum to sulphoaluminate mineral is 0.5:1 ~ 3: 1;
preferably, the ratio of gypsum to sulphoaluminate mineral is 1:1 ~ 2: 1.
The modifying liquid accounts for 5 to 25 percent of the expansion material before modification.
The preparation method of the expansion material with the slower reaction rate comprises the steps of mixing the modification liquid with the inorganic matter containing the sulphoaluminate mineral in the vertical ball mill in a spraying mode, controlling the material proportion in the modified product by controlling the feeding amount of the inorganic matter containing the sulphoaluminate mineral in the ball mill and the feeding amount of the regulating and controlling additive in the modification liquid, and utilizing the high material proportion generated by the grinding in the grinding machineThe temperature is high, so that the dispersing medium in the modification liquid is volatilized; the specific surface area of the product after grinding is controlled to be 200-500 m2/kg。
The invention bonds the traditional sulphoaluminate expanding agent and the regulating and controlling additive together, so that the hydration speed of the expanding agent is delayed relative to the hydration speed of cement, but not delayed absolute time of the hydration speed of the expanding agent, and the acceleration effect of temperature on the hydration of the expanding agent is slowed down. 1) The distribution of the regulating admixture between the expanding agent and the cement matrix is controlled, the regulating admixture and the expanding agent are bonded together by regulating, controlling and controlling, the concentration of the regulating admixture around the expanding agent particles is higher, only part of the regulating admixture can be diffused to the cement matrix, and therefore the influence on cement hydration is reduced. 2) The concentration of the regulator in the matrix is further reduced by using a slow release technology, so that the concentration of the regulator can influence the hydration of the expanding agent rather than the cement hydration.
The invention has the advantages that:
1) the core of the invention is to improve the distribution of the regulating admixture between the expanding agent and the cement matrix, thereby improving the concentration of the regulating admixture around the expanding agent particles, reducing the use amount of the regulating admixture, and further reducing the influence of the regulating admixture on cement hydration.
2) The invention introduces the regulating admixture, because the hydration of the expanding material is improved, the inorganic substance containing the sulphoaluminate mineral is not required to be coated by the adhesive, and the inorganic substance containing the sulphoaluminate mineral and the regulating admixture are only required to be bonded together by a proper amount of the adhesive, thereby achieving the aim, and solving the problem that if the traditional coating method is adopted, the expanding agent can be quickly hydrated after contacting with water once the coating is broken.
3) The influence of the regulation and control admixture on cement hydration can be further reduced by using the regulation and control admixture with a slow release function.
4) Due to the adoption of the method for chemically inhibiting the hydration of the expanding agent by regulating and controlling the additive, the expansion performance of the expanding agent in the middle and later periods of the solid structure (high temperature process) can be improved.
Drawings
FIG. 1 is a temperature history used for evaluating the performance of the present invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The invention will be better understood from the following examples. However, those skilled in the art will readily appreciate that the specific material ratios, process conditions and results thereof described in the examples are illustrative only and should not be taken as limiting the invention as detailed in the claims.
The product performance detection method of the invention comprises the following steps: after the expanding agent is added, the concrete deforms in the deformation process under the condition of variable temperature, particularly in the temperature reduction stage. Adding PVC cylindrical inner pipe with diameter of 10mm and height of 420mm into fresh concrete, embedding strain gauge, sealing and placing into an environment box, setting temperature course according to figure 1, and mainly measuring deformation value at temperature drop stage with temperature peak as deformation zero. The cracking of the conventional concrete mainly occurs in a temperature reduction stage, and the smaller the shrinkage deformation in the temperature reduction stage is, the better the cracking resistance effect of the expanding agent is. Because the variable of temperature is introduced, the performance indexes of the products are unified into unit temperature drop shrinkage for facilitating transverse comparison. The smaller the shrinkage per unit temperature drop, the better the crack resistance. The difference of the setting time is detected according to the standard GB 8076 concrete admixture.
The concrete formulation is shown in table 1, the expanding agent is replaced by 5% of the rubber material, and the cement is 42.5 cement.
TABLE 1 concrete mix proportion (unit: kg/m)3）
| Water (W) | Cement | Fly ash | Sand | Large stone | Small stone | Expanding agent | |
| Datum | 160 | 250 | 125 | 738 | 664.2 | 442.8 | 0 |
| Expanding agent | 160 | 237．5 | 118．75 | 738 | 664.2 | 442.8 | 18.75 |
The following units are by weight.
Examples 1 to 4 are for preparing a control admixture having a sustained-release function; examples 5-16 are configurations of intumescent materials with slower reaction rates.
Example 1
100 parts of boric acid and 400 parts of pregelatinized starch are added into 1100 parts of water to form a homogeneous solution, and the homogeneous solution is spray-dried to obtain the regulating and controlling admixture with the sustained and controlled release function.
Example 2
100 parts of dextrin and 150 parts of pregelatinized starch are added into 700 parts of water to form a homogeneous solution, and the homogeneous solution is spray-dried to obtain the regulating and controlling admixture with the sustained and controlled release function.
Example 3
100 parts of borax and 400 parts of pregelatinized starch are added into 580 parts of water to form a homogeneous solution, and the homogeneous solution is spray-dried to obtain the regulating and controlling admixture with the sustained and controlled release function.
Example 4
100 parts of tannic acid and 230 parts of pregelatinized starch are added into 580 parts of water to form a homogeneous solution, and the homogeneous solution is spray-dried to obtain the regulating and controlling admixture with the sustained and controlled release function.
Example 5
20 parts of tannic acid and 80 parts of dextrin are added into 800 parts of water to form a homogeneous solution, and the homogeneous solution is spray-dried to obtain the regulating and controlling admixture with the sustained and controlled release function.
Example 6
Preparing a modifying solution: 0.5 part of ethyl cellulose, 0.1 part of the regulating and controlling admixture with the sustained and controlled release function obtained in the example 1 and 5 parts of ethanol are uniformly mixed to obtain the modified liquid.
Adding 100 parts of sulphoaluminate expansion clinker into a ball mill, uniformly spraying and adding the modified liquid while grinding, blowing appropriate hot air according to the environmental temperature and the dry and wet conditions of the materials to take away the redundant dispersion medium, and grinding until the comparative area of the final product is 200m2/kg。
Example 7
Preparing a modifying solution: 1 part of ethyl cellulose, 0.5 part of the regulating and controlling admixture with the sustained and controlled release function obtained in the example 3 and 10 parts of ethanol are uniformly mixed to obtain the modified liquid.
Adding 100 parts of sulphoaluminate expansion clinker into a ball mill, uniformly spraying and adding the modified liquid while grinding, blowing appropriate hot air according to the environmental temperature and the dry and wet conditions of the materials to take away the redundant dispersion medium, and grinding until the comparative area of the final product is 250m2/kg。
Example 8
Preparing a modifying solution: 1.5 parts of ethyl cellulose, 1 part of the regulating and controlling admixture with the sustained and controlled release function obtained in the embodiment 4 and 15 parts of ethanol are uniformly mixed to obtain the modified liquid.
Adding 100 parts of sulphoaluminate expansion clinker into a ball mill, uniformly spraying and adding the modified liquid while grinding, blowing appropriate hot air according to the environmental temperature and the dry and wet conditions of the materials to take away the redundant dispersion medium, and grinding until the comparative area of the final product is 350m2/kg。
Example 9
Preparing a modifying solution: 2 parts of ethyl cellulose, 1.25 parts of the regulating and controlling admixture with the sustained and controlled release function obtained in the example 2 and 20 parts of ethanol are uniformly mixed to obtain the modified liquid.
Adding 100 parts of sulphoaluminate cement into a ball mill, uniformly spraying the modifying liquid while grinding, blowing appropriate hot air according to the environmental temperature and the dry and wet conditions of the materials, taking away the redundant dispersion medium, and grinding until the comparative area of the final product is 450m2/kg。
Example 10
Preparing a modifying solution: 1 part of ethyl cellulose, 0.5 part of the regulating and controlling admixture with the sustained and controlled release function obtained in the example 3 and 20 parts of ethanol are uniformly mixed to obtain the modified liquid.
Adding 35 parts of gypsum and 65 parts of sulphoaluminate crystals into a ball mill, uniformly spraying and adding the modified liquid while grinding, blowing appropriate hot air according to the environmental temperature and the dry and wet conditions of the materials to take away redundant dispersion medium, and grinding until the comparative area of the final product is 400m2/kg。
Example 11
Preparing a modifying solution: 1 part of ethyl cellulose, 0.5 part of the regulating and controlling admixture with the sustained and controlled release function obtained in the example 3 and 20 parts of ethanol are uniformly mixed to obtain the modified liquid.
Adding 50 parts of gypsum and 50 parts of sulphoaluminate crystals into a ball mill, uniformly spraying and adding the modified liquid while grinding, blowing appropriate hot air according to the environmental temperature and the dry and wet conditions of materials to take away redundant dispersion medium, and grinding until the comparative area of the final product is 400m2/kg。
Example 12
Preparing a modifying solution: 1 part of ethyl cellulose, 0.5 part of the regulating and controlling admixture with the sustained and controlled release function obtained in the example 3 and 20 parts of ethanol are uniformly mixed to obtain the modified liquid.
Adding 60 parts of gypsum and 40 parts of sulphoaluminate crystals into a ball mill, uniformly spraying and adding the modified liquid while grinding, blowing appropriate hot air according to the environmental temperature and the dry and wet conditions of materials to take away redundant dispersion medium, and grinding until the comparative area of the final product is 400m2/kg。
Example 13
Preparing a modifying solution: 1 part of ethyl cellulose, 0.5 part of the regulating and controlling admixture with the sustained and controlled release function obtained in the example 3 and 22 parts of ethanol are uniformly mixed to obtain the modified liquid.
Adding 65 parts of gypsum and 35 parts of sulphoaluminate crystals into a ball mill, uniformly spraying and adding the modified liquid while grinding, blowing appropriate hot air according to the environmental temperature and the dry and wet conditions of the materials to take away redundant dispersion medium, and grinding until the comparative area of the final product is 400m2/kg。
Example 14
Preparing a modifying solution: 2 parts of ethyl cellulose, 1.2 parts of the regulating and controlling admixture with the sustained and controlled release function obtained in the example 5 and 20 parts of ethanol are uniformly mixed to obtain the modified liquid.
Adding 50 parts of gypsum and 50 parts of sulphoaluminate expansion clinker into a ball mill, uniformly spraying and adding the modified liquid while grinding, blowing appropriate hot air according to the environmental temperature and the dry and wet conditions of the materials to take away redundant dispersion medium, and grinding until the comparative area of the final product is 400m2/kg。
Comparative example 1
Grinding to a comparative area of 450m2Per kg 100 parts of thioaluminate crystals.
Comparative example 2
Grinding to a comparative area of 450m2Perkg of a mixture of 100 parts of thioaluminate crystals, 1 part of ethylcellulose and 0.5 part of dextrin powder.
Comparative example 3
Grinding to a comparative area of 450m2Per kg of 100 parts of sulphoaluminateSalt crystals, 1 part of ethyl cellulose, 5 parts of dextrin powder.
Comparative example 4
Preparing a modifying solution: 1 part of ethyl cellulose and 100 parts of ethanol are uniformly mixed to obtain the modified liquid.
Adding 100 parts of sulphoaluminate crystals into a ball mill, uniformly spraying the modification liquid while grinding, blowing appropriate hot air according to the environmental temperature and the dry and wet conditions of the materials to take away the redundant dispersion medium, and grinding until the comparative area of the final product is 450m2/kg。
And 0.5 part of dextrin was added to the above-mentioned modified product to mix the mixture.
And (3) detection process: the baseline, examples 5-16, and comparative examples 1-4 recorded the setting time and the unit temperature drop distortion with the temperature trend shown in fig. 1.
TABLE A comparison of the coagulation time difference and the temperature drop deformation data of the examples
It can be seen in the table that 1) the concrete setting is accelerated for typical addition of expansion agents (comparative example 1); 2) the control admixture is directly and slightly mixed, and the whole is dispersed into a matrix, and the concentration is extremely low, so that the hydration of the expanding agent cannot be controlled (comparative example 2). If the bonding mode of the invention is not adopted, when the hydration of the expansion agent is regulated to a certain extent, the regulation admixture is directly added in a large amount, the setting time of the concrete is greatly prolonged, the setting time is greatly prolonged, and the expansion effect in the temperature reduction stage is also weakly improved (comparison 3). The direct use of bonding also results in a lesser degree of improvement in product properties. By adopting the bonding mode and adopting a slow release technology for regulating and controlling the admixture, the final effect is better.
Claims (8)
1. A regulation and control admixture with a sustained and controlled release function is characterized in that the modified regulation and control admixture is prepared by a sustained release technology, and is prepared by mixing water, the regulation and control admixture and pregelatinized starch into a homogeneous solution and then spray drying;
the regulating and controlling additive is capable of regulating and controlling hydration of sulphoaluminate minerals and is one or more of boric acid, borax, tannic acid and dextrin.
2. The regulating admixture with controlled release function according to claim 1,
in the preparation process of the regulating and controlling admixture with the controlled release capability, the proportion of the regulating and controlling admixture in the total solid phase mass is 20-40%; in the preparation process of the regulating and controlling additive with controlled release capacity, the integral solid content is controlled to be 25-50%.
3. The use of a control admixture with sustained and controlled release according to claim 1 for preparing a modified solution.
4. The modified solution of claim 3, wherein the modified solution is composed of a control admixture with a controlled release function, a binder and a dispersion medium;
the mass ratio of the regulating admixture to the adhesive in the regulating admixture with the sustained and controlled release function is (1-25): (25-100);
the adhesive is ethyl cellulose;
the dispersion medium is methanol or ethanol.
5. The use of the modifying solution as set forth in claim 4, wherein the modifying solution is used for modifying an expandable material to slow the expansion process of the expandable material;
the expansion material before modification is an inorganic substance containing sulphoaluminate minerals and is selected from one or more of sulphoaluminate crystals, sulphoaluminate cement and sulphoaluminate expansion clinker;
the intumescent material may also contain gypsum, wherein the ratio of gypsum to sulphoaluminate mineral is 0.5:1 ~ 3: 1.
6. The use according to claim 5, wherein the modifying liquid comprises 5% to 25% of the intumescent material to be modified.
7. Use according to claim 5, wherein the ratio of gypsum to sulphoaluminate mineral is 1:1 ~ 2: 1.
8. The use according to claim 5, wherein the modifying liquid is used in a modifying method for modifying an intumescent material, comprising the following steps:
mixing the modification liquid and inorganic matter containing sulphoaluminate minerals in an upright ball mill in a spraying mode, controlling the material proportion in the modified product by controlling the feeding amount of the inorganic matter containing sulphoaluminate minerals in the ball mill and the feeding amount of the regulating and controlling additive in the modification liquid, and volatilizing the dispersion medium in the modification liquid by utilizing the high temperature generated by grinding in a grinding machine; the specific surface area of the product after grinding is controlled to be 200-500 m2/kg。
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012017213A (en) * | 2010-07-06 | 2012-01-26 | Kawai Sekkai Kogyo Kk | Expansive solidifying material |
| CN103130441A (en) * | 2011-12-02 | 2013-06-05 | 贵州中建建筑科研设计院有限公司 | Slow-release additive agent for pump concrete |
| CN104211508A (en) * | 2014-08-28 | 2014-12-17 | 成都新柯力化工科技有限公司 | Micro colloid particle fertilizer and application thereof |
| CN104386938A (en) * | 2014-10-30 | 2015-03-04 | 中冶天工集团有限公司 | Multifunctional expanding agent for seamless construction of ultra-long concrete structure |
| WO2019093099A1 (en) * | 2017-11-07 | 2019-05-16 | デンカ株式会社 | Expansive cement admixture, expansive cement admixture slurry, and expansive cement concrete prepared using same and method for production thereof |
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- 2019-11-01 CN CN201911057962.XA patent/CN110627405B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012017213A (en) * | 2010-07-06 | 2012-01-26 | Kawai Sekkai Kogyo Kk | Expansive solidifying material |
| CN103130441A (en) * | 2011-12-02 | 2013-06-05 | 贵州中建建筑科研设计院有限公司 | Slow-release additive agent for pump concrete |
| CN104211508A (en) * | 2014-08-28 | 2014-12-17 | 成都新柯力化工科技有限公司 | Micro colloid particle fertilizer and application thereof |
| CN104386938A (en) * | 2014-10-30 | 2015-03-04 | 中冶天工集团有限公司 | Multifunctional expanding agent for seamless construction of ultra-long concrete structure |
| WO2019093099A1 (en) * | 2017-11-07 | 2019-05-16 | デンカ株式会社 | Expansive cement admixture, expansive cement admixture slurry, and expansive cement concrete prepared using same and method for production thereof |
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