Preparation process of concrete admixture

Abstract

The invention discloses a preparation process of a concrete admixture. According to the technical scheme, the preparation method is characterized by comprising the following steps: S11, preparing raw materials: preparing the following components in parts by weight: 1-5 parts of a super plasticizer, 2-10 parts of a surfactant, 0.8-3 parts of ammonium salt, 2-8 parts of polymeric alkylol amine, 1-5 parts of allyl polyoxyethylene ether, 0.01-0.2 part of an initiator, 0.8-1 part of a retarder, 0.01-2 parts of a defoaming agent and 2-15 parts of sodium tetrapolypropylene benzene sulfonate; and S12, carrying out water bath reaction: sequentially putting polymeric alcohol amine, allyl polyoxyethylene ether, sodium tetrapolypropylene benzene sulfonate and ammonium salt into a water bath kettle, then raising the temperature of the water bath kettle to 60-85 DEG C, then adding an initiator, and carrying out heat preservation reaction for 3-6 hours to obtain a mixed solution. The effects of improving the contact property of the concrete and the spraying surface, eliminating the problem of serious rebound during concrete spraying, accelerating the coagulation and solidification of the sprayed concrete and improving the strength of the concrete are achieved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a preparation process of a concrete admixture. Background technique [0002] Concrete admixture is a chemical substance that is added in the process of mixing concrete, accounting for less than 5% of the cement mass, and can significantly improve the performance of concrete. Adding admixtures to concrete has the characteristics of less investment, quick results, and significant technical and economic benefits. . With the continuous advancement of science and technology, admixtures have been used more and more, and admixtures have become the fifth important component of concrete in addition to the four basic components. [0003] It can be referred to the Chinese patent whose publication number is CN111871312A, which discloses a concrete admixture production process, which mainly includes the following processing steps: checking discharge, starting stirring, collectin...

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Problems solved by technology

[0004] The above-mentioned patent has the feature that when the stirring shaft rotates, it will drive the auger shaft to rotate, so that the auger shaft will transport the raw materials at the end of the mixing box near the discharge port to the end of the transport tank, so that the raw materials inside the mixing box can move laterally, so that the mixing box The internal raw materials can be stirred with the stirring rod, and there will be no dead angle of stirring, so that the raw materials in the stirring box can be fully stirred and mixed, but it also has defects, such as: the admixture prepared by the above process is used , will lead to severe water separation in the concrete during curing, and the homogeneity level of the concrete after curing is not high, the strength is low, and the spray rebound is serious

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