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Rust-resistant polycarboxylate superplasticizer for ultra-high performance concrete and preparation method of rust-resistant polycarboxylate superplasticizer
The invention discloses a corrosion-resistant polycarboxylic acid water reducer for ultra-high performance concrete and a preparation method thereof.The preparation method comprises the steps that S1, methyl allyl polyoxyethylene ether, unsaturated nitrogen heterocyclic monomers and deionized water are added into a reaction kettle and stirred and mixed to be uniform, and a solution A is obtained; s2, when the temperature of the solution A is increased to 30-40 DEG C, adding hydrogen peroxide, dropwise adding a deionized water mixed solution of acrylic acid and imidazole monomers and a deionized water mixed solution of ascorbic acid and thiohydracrylic acid at the same time, dropwise adding for 2.5-3.5 h, and then carrying out heat preservation reaction for 1-2 h to obtain a solution D; s3, adding caustic soda liquid with the mass fraction of 30% into the solution D, and adjusting the pH value to be 6-7, so as to obtain the corrosion-resistant polycarboxylic acid water reducer with the mass fraction of 40% for the ultra-high performance concrete. The corrosion-resistant polycarboxylate superplasticizer provided by the invention can effectively prevent corrosion of steel fibers while ensuring the working performance and strength of the ultra-high performance concrete, and ensures the durability of the ultra-high performance concrete structure in long-term service in ocean engineering.
本发明公开了一种超高性能混凝土用阻锈型聚羧酸减水剂及其制备方法，所述制备方法包括：S1、将甲基烯丙基聚氧乙烯基醚、不饱和氮杂环单体和去离子水加入反应釜中，搅拌混匀得到A溶液；S2、待A溶液温度升至30‑40℃时加入双氧水，并分别同时滴加丙烯酸、咪唑类单体的去离子水混合溶液和抗坏血酸、巯基丙酸的去离子水混合溶液，滴加2.5‑3.5h后保温反应1‑2h得到D溶液；S3、在D溶液中加入质量分数30％的液碱，调节pH值为6‑7，得到质量分数40％的超高性能混凝土用阻锈型聚羧酸减水剂。本发明所提供的阻锈型聚羧酸减水剂能在保证超高性能混凝土的工作性能和强度的同时有效阻止钢纤维的锈蚀，保障超高性能混凝土结构在海洋工程中长期服役的耐久性。
Rust-resistant polycarboxylate superplasticizer for ultra-high performance concrete and preparation method of rust-resistant polycarboxylate superplasticizer
The invention discloses a corrosion-resistant polycarboxylic acid water reducer for ultra-high performance concrete and a preparation method thereof.The preparation method comprises the steps that S1, methyl allyl polyoxyethylene ether, unsaturated nitrogen heterocyclic monomers and deionized water are added into a reaction kettle and stirred and mixed to be uniform, and a solution A is obtained; s2, when the temperature of the solution A is increased to 30-40 DEG C, adding hydrogen peroxide, dropwise adding a deionized water mixed solution of acrylic acid and imidazole monomers and a deionized water mixed solution of ascorbic acid and thiohydracrylic acid at the same time, dropwise adding for 2.5-3.5 h, and then carrying out heat preservation reaction for 1-2 h to obtain a solution D; s3, adding caustic soda liquid with the mass fraction of 30% into the solution D, and adjusting the pH value to be 6-7, so as to obtain the corrosion-resistant polycarboxylic acid water reducer with the mass fraction of 40% for the ultra-high performance concrete. The corrosion-resistant polycarboxylate superplasticizer provided by the invention can effectively prevent corrosion of steel fibers while ensuring the working performance and strength of the ultra-high performance concrete, and ensures the durability of the ultra-high performance concrete structure in long-term service in ocean engineering.
本发明公开了一种超高性能混凝土用阻锈型聚羧酸减水剂及其制备方法，所述制备方法包括：S1、将甲基烯丙基聚氧乙烯基醚、不饱和氮杂环单体和去离子水加入反应釜中，搅拌混匀得到A溶液；S2、待A溶液温度升至30‑40℃时加入双氧水，并分别同时滴加丙烯酸、咪唑类单体的去离子水混合溶液和抗坏血酸、巯基丙酸的去离子水混合溶液，滴加2.5‑3.5h后保温反应1‑2h得到D溶液；S3、在D溶液中加入质量分数30％的液碱，调节pH值为6‑7，得到质量分数40％的超高性能混凝土用阻锈型聚羧酸减水剂。本发明所提供的阻锈型聚羧酸减水剂能在保证超高性能混凝土的工作性能和强度的同时有效阻止钢纤维的锈蚀，保障超高性能混凝土结构在海洋工程中长期服役的耐久性。
Rust-resistant polycarboxylate superplasticizer for ultra-high performance concrete and preparation method of rust-resistant polycarboxylate superplasticizer
超高性能混凝土用阻锈型聚羧酸减水剂及其制备方法
FANG YANWEI (author) / GAO YUJUN (author) / SUN WU (author) / WANG WENRONG (author) / WANG QUANCHAO (author) / SHI REN (author) / YE ZHOU (author) / YANG WU (author) / XIE QIAN (author)
2024-03-26
Patent
Electronic Resource
Chinese
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