A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Super-long slow-release polycarboxylic acid water reducer as well as preparation method and use method thereof
The invention relates to a super-long slow-release polycarboxylic acid water reducer, which is prepared from the following raw materials: polyoxyethylene ether; an unsaturated binary acid; an unsaturated monoacid hydroxyalkyl ester; an unsaturated dibasic acid diol ester; an oxidant; a reducing agent; a chain transfer agent; a molecular weight regulator; and water; the number-average molecular weight of the polyoxyethylene ether is 600 to 2400. The invention also provides a preparation method and a use method of the water reducing agent. The water reducing agent basically has no slump at the initial stage, but the fluidity is continuously increased within 1-6 hours, and the water reducing agent still has relatively high fluidity within 7-8 hours, so that the high requirement on fluidity retentivity in engineering can be met. The slump retaining agent is suitable for constructional engineering such as high-rise buildings, long-span bridges, marine drilling platforms, tunnels, dams or airports with high slump retaining requirements. In addition, the preparation method of the water reducer is simple in process, low in raw material cost and beneficial to large-scale industrial production.
本申请涉及一种超长缓释型聚羧酸系减水剂，其由下述原料制成：聚氧乙烯醚；不饱和二元酸；不饱和一元酸羟烷基酯；不饱和二元酸二元醇酯；氧化剂；还原剂；链转移剂；分子量调节剂；以及水；聚氧乙烯醚的数均分子量为600‑2400。本申请还提供如上所述的减水剂的制备和使用方法。本发明的减水剂初始基本无坍落度，但1～6小时内流动度不断增长，7～8小时仍有较大流动度，能够满足工程中对流动度保持性的高要求。适用于对坍落度保持性要求高的高层建筑物、大跨度桥梁、海洋钻井平台、隧道、大坝或机场等建筑工程中。此外，本申请的减水剂制备方法工艺简单、原料成本低、利于大规模工业化生产。
Super-long slow-release polycarboxylic acid water reducer as well as preparation method and use method thereof
The invention relates to a super-long slow-release polycarboxylic acid water reducer, which is prepared from the following raw materials: polyoxyethylene ether; an unsaturated binary acid; an unsaturated monoacid hydroxyalkyl ester; an unsaturated dibasic acid diol ester; an oxidant; a reducing agent; a chain transfer agent; a molecular weight regulator; and water; the number-average molecular weight of the polyoxyethylene ether is 600 to 2400. The invention also provides a preparation method and a use method of the water reducing agent. The water reducing agent basically has no slump at the initial stage, but the fluidity is continuously increased within 1-6 hours, and the water reducing agent still has relatively high fluidity within 7-8 hours, so that the high requirement on fluidity retentivity in engineering can be met. The slump retaining agent is suitable for constructional engineering such as high-rise buildings, long-span bridges, marine drilling platforms, tunnels, dams or airports with high slump retaining requirements. In addition, the preparation method of the water reducer is simple in process, low in raw material cost and beneficial to large-scale industrial production.
本申请涉及一种超长缓释型聚羧酸系减水剂，其由下述原料制成：聚氧乙烯醚；不饱和二元酸；不饱和一元酸羟烷基酯；不饱和二元酸二元醇酯；氧化剂；还原剂；链转移剂；分子量调节剂；以及水；聚氧乙烯醚的数均分子量为600‑2400。本申请还提供如上所述的减水剂的制备和使用方法。本发明的减水剂初始基本无坍落度，但1～6小时内流动度不断增长，7～8小时仍有较大流动度，能够满足工程中对流动度保持性的高要求。适用于对坍落度保持性要求高的高层建筑物、大跨度桥梁、海洋钻井平台、隧道、大坝或机场等建筑工程中。此外，本申请的减水剂制备方法工艺简单、原料成本低、利于大规模工业化生产。
Super-long slow-release polycarboxylic acid water reducer as well as preparation method and use method thereof
超长缓释型聚羧酸系减水剂及其制备和使用方法
SEOK BYEONG-CHEON (author) / GU RANRAN (author) / ZHENG ZUNTAO (author) / WANG LIQIANG (author) / DING SHAOWEN (author) / CHENG ZHENGJIN (author) / WU JIA (author) / SHI WUKUI (author)
2022-07-29
Patent
Electronic Resource
Chinese
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