Slump retention agent and preparation method thereof

Abstract

The invention discloses a slump retention agent and a preparation method thereof, which relates to the field of concrete additives, and solves the problems that the slump retention agent is limited in the source of raw materials. Raw materials of the slump retention agent consist of the following components by weight percent: 40 to 45 percent of polyether, 0.2 to 0.5 percent of initiator, 0.1 to 0.24 percent of chain transfer agent, 0.1 to 0.2 percent of reducing agent, 2 to 5 percent of small monomers, 48.06 to 58.7 percent of water and 0.5 to 1.0 percent of alkali, wherein the polyether is methyl allyl glycol polyoxyethylene ether, or the polyether is a mixture of methyl allyl glycol polyoxyethylene ether and methyl allyl polyoxyethylene ether and / or methyl butenyl polyoxyethylene ether. The slump retention agent is wide in selectable range of raw materials and excellent in performance.

Description

technical field [0001] The invention relates to the field of concrete admixtures, in particular to a slump retaining agent and a preparation method thereof. Background technique [0002] As a building material, concrete is widely used in many fields. With the development of concrete, the technology of concrete admixture has also been rapidly developed. Concrete admixture is an indispensable component in concrete. It plays a role in concrete production technology. To the core role, determines the quality of concrete. Among them, as an important concrete admixture, water reducing agent can effectively improve the construction performance of concrete and increase the strength of concrete. Among many water reducers, polycarboxylate water reducer is the third generation water reducer, which has high water reducing rate, less dosage, environmental protection and the ability to maintain concrete slump. With the rapid development of my country's economy and construction With the ra...

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Problems solved by technology

[0003] Along with the wide application of slump retaining agent, its usage is increasing day by day, the synthetic raw material of existing slump retaining agent generally comprises polyether, initiator, chain transfer agent, reducing agent, small monomer and water, wherein, Polyether often chooses one or two or more of polyethylene glycol monomethyl ether, allyl polyoxyethylene ether, methallyl polyoxyethylene ether and methylbutenyl polyoxyethylene ether; Some slump retaining agents have limited sources of raw materials, and due to the differences in concrete composition, preparation technology and construction environment, the slump retaining agents have different performances on concrete and thus affect the construction performance of concrete; the existing slump The slump retaining agent can no longer meet the actual use requirements, so it is necessary to develop more slump retaining agent raw materials while ensuring the excellent performance of the slump retaining agent

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