Intelligent response type concrete admixture as well as preparation method and application thereof

By introducing temperature-sensitive and calcium ion-chelating block copolymer side chains and nano-reinforced side chains into concrete admixtures, the problem of prolonged setting time of hydration heat regulation materials is solved, realizing dynamic regulation of hydration heat and improvement of early strength, thus ensuring the durability of concrete.

CN122277823APending Publication Date: 2026-06-26SHAMEN LUQIAO XIANG TONG BUILDING MATERIALS SCI & TECHNOLO
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Patent Information

Application Number
CN202610306568.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-13
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing hydration heat control materials tend to prolong setting time and affect early strength when reducing the peak hydration heat of concrete, and they cannot dynamically respond to changes in temperature and ion concentration, resulting in insufficient synergy.

Method used

By employing intelligent responsive concrete admixtures, block copolymer side chains with temperature-sensitive structural units and calcium ion-chelating structural units, as well as composite nanoparticles with nano-reinforced side chains, are introduced into the main chain to achieve dynamic control of hydration heat and improvement of early strength.

Benefits of technology

It achieves precise suppression of hydration heat peak and improvement of early strength, avoiding the problem of prolonged setting time in traditional methods, while maintaining the durability of concrete over a long period of time.

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Abstract

The invention belongs to the technical field of building materials, and relates to an intelligent response type concrete admixture as well as a preparation method and application thereof. The intelligent response type concrete admixture comprises a main chain as well as at least one intelligent response side chain and at least one nano reinforced side chain which are bonded to the main chain, and the main chain comprises a polyether structural unit and an unsaturated carboxylic acid structural unit; the intelligent response side chain comprises a block copolymerized temperature-sensitive structural unit and a calcium ion strong chelating structural unit, the nano reinforced side chain is bonded with composite nanoparticles, and each composite nanoparticle sequentially comprises a silicon dioxide core, a soluble calcium source layer and a silane coupling agent layer from inside to outside. According to the intelligent response type concrete admixture provided by the invention, the intelligent response side chain and the nano reinforced side chain are introduced on the main chain, so that the decoupling of the setting time and the temperature control can be realized, and the adiabatic temperature and the maximum heat release rate are reduced on the basis of ensuring the early strength.
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