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A platform for research: civil engineering, architecture and urbanism
Machine-made sand concrete and preparation method thereof
The invention belongs to the technical field of building materials, and particularly relates to machine-made sand concrete and a preparation method thereof.The machine-made sand concrete is prepared from allyl-containing quaternary ammonium salt, acrylic acid and hydroxyethyl acrylate as small polymerization monomers and methyl allyl polyoxyethylene ether as large polymerization monomers in the presence of a water-soluble chain transfer agent and an initiator; the material is prepared through aqueous solution free radical polymerization. Through molecular design, the compatibility of the polycarboxylate superplasticizer and the machine-made sand with the high MB value and the high stone powder content is improved, the problem that the workability of concrete is poor due to the fact that a conventional polycarboxylate superplasticizer is intercalated between clay mineral layers is solved, and application of the machine-made sand with the high MB value in high-performance concrete is achieved.
本发明属于建筑材料技术领域，更具体的涉及一种机制砂混凝土及其制备方法，以含丙烯基的季铵盐、丙烯酸、丙烯酸羟乙酯为聚合小单体，甲基烯丙基聚氧乙烯醚为聚合大单体，在水溶性链转移剂和引发剂下，通过水溶液自由基聚合制备而成。本发明通过分子设计，提高聚羧酸减水剂与高MB值、高石粉含量机制砂相容性，克服常规聚羧酸减水剂在粘土矿物层间插层导致混凝土工作性不良的问题，实现高MB值机制砂在高性能混凝土中的应用。
Machine-made sand concrete and preparation method thereof
The invention belongs to the technical field of building materials, and particularly relates to machine-made sand concrete and a preparation method thereof.The machine-made sand concrete is prepared from allyl-containing quaternary ammonium salt, acrylic acid and hydroxyethyl acrylate as small polymerization monomers and methyl allyl polyoxyethylene ether as large polymerization monomers in the presence of a water-soluble chain transfer agent and an initiator; the material is prepared through aqueous solution free radical polymerization. Through molecular design, the compatibility of the polycarboxylate superplasticizer and the machine-made sand with the high MB value and the high stone powder content is improved, the problem that the workability of concrete is poor due to the fact that a conventional polycarboxylate superplasticizer is intercalated between clay mineral layers is solved, and application of the machine-made sand with the high MB value in high-performance concrete is achieved.
本发明属于建筑材料技术领域，更具体的涉及一种机制砂混凝土及其制备方法，以含丙烯基的季铵盐、丙烯酸、丙烯酸羟乙酯为聚合小单体，甲基烯丙基聚氧乙烯醚为聚合大单体，在水溶性链转移剂和引发剂下，通过水溶液自由基聚合制备而成。本发明通过分子设计，提高聚羧酸减水剂与高MB值、高石粉含量机制砂相容性，克服常规聚羧酸减水剂在粘土矿物层间插层导致混凝土工作性不良的问题，实现高MB值机制砂在高性能混凝土中的应用。
Machine-made sand concrete and preparation method thereof
一种机制砂混凝土及其制备方法
ZHANG KAI (author) / CHEN WANGNENG (author) / ZHU XIAOJIAN (author) / PU LIRONG (author) / YE SHANBIN (author)
2022-04-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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