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Super-early-strength concrete admixture and preparation method thereof

A concrete admixture, ultra-early strength technology, applied in the field of concrete admixtures, can solve problems such as early-strength effect, and achieve the effect of satisfying the demoulding strength

Active Publication Date: 2020-12-25
安徽海螺材料科技股份有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the concrete produced by prefabricated buildings is C40 and below concrete, and the early-strength concrete admixtures on the market are difficult to achieve a significant early-strength effect on C40 and below-grade concrete

Method used

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  • Super-early-strength concrete admixture and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 14 parts of polycarboxylate water reducer, 6 parts of viscosity-reducing polycarboxylate water reducer and 1 part of retarder by weight, add 72 parts of water, and mix well; add 2 parts of modified alcohol amine and 5 parts of sodium thiocyanate 1. Add 0.1 part of air-entraining agent and 0.05 part of defoamer into the mixed solution and mix evenly; according to the pH value of the solution, add an appropriate amount of pH regulator to adjust the pH value of the solution to 7-9.

[0032] Implementation column 2:

[0033] Take 14 parts of polycarboxylate water reducer, 6 parts of viscosity-reducing polycarboxylate water reducer and 1 part of retarder by weight, add 70 parts of water, and mix well; add 4 parts of modified alcoholamine and 5 parts of sodium thiocyanate , 0.1 part of air-entraining agent and 0.05 part of defoamer are added to the mixed solution, and mixed evenly; an appropriate amount of pH regulator is added to adjust the pH value of the solution to 7...

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Abstract

The invention relates to a super-early-strength concrete admixture and a preparation method thereof. The super-early-strength concrete admixture comprises the following components in parts by weight:5-20 parts of a polycarboxylate superplasticizer; 5-10 parts of a viscosity reduction type polycarboxylate superplasticizer; 1-5 parts of a retarder; 1-5 parts of an alcohol amine compound; 1-5 partsof thiocyanate; 0.1-0.5 parts of an air entraining agent; 0.1-0.5 parts of a defoaming agent; 5-10 parts of a viscosity modifier; a small amount of a pH regulator; and 52-74 parts of water. The super-early-strength concrete admixture and the preparation method thereof are specially oriented to concrete with the grade of C40 or below of an assembly type component factory, the construction performance of the concrete within the specified time can be guaranteed, an early strength agent free of harmful ions such as chloride ions and sulfate radicals is added, the early strength of the concrete isimproved, and no adverse effect is caused on the later strength of the concrete. On the other hand, the viscosity of the concrete is adjusted, so that the constructability and the compactness reach abalance point, and the production efficiency of the component factory is improved.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a super-early-strength concrete admixture and a preparation method thereof. Background technique [0002] Since the release of the "Evaluation Standards for Industrialized Buildings" at the end of 2015 and the decision to promote prefabricated buildings across the country in 2016, Sichuan Province has actively responded to the call of the state. Sichuan Province's "Implementation Opinions on Promoting the High-quality Development of Sichuan's Construction Industry" clearly stated "to comprehensively promote the development of prefabricated buildings". In 2020, 46 million m2 of new prefabricated buildings will be started in Sichuan Province. Except for the cities (states) that clearly require the division, other cities (states) will specify a certain proportion of prefabricated buildings in the annual new buildings, and the assembly rate of single buildings must not be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16
CPCC04B40/0039C04B24/161C04B24/122C04B24/16C04B2103/304C04B2103/50C04B2103/0094Y02W30/91
Inventor 蒲诗杰李成勇龚磊赵超汪渝入吴永红张冬
Owner 安徽海螺材料科技股份有限公司
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