Super-early-strength concrete admixture and preparation method thereof

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...

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

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