A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
High-strength concrete viscosity reduction type polycarboxylate superplasticizer and preparation method thereof
The invention belongs to the technical field of building materials, and particularly relates to a high-strength concrete viscosity reduction type polycarboxylate superplasticizer and a preparation method thereof, and the viscosity reduction type polycarboxylate superplasticizer is prepared through an aqueous solution free radical polymerization reaction. The viscosity reduction type polycarboxylate superplasticizer is prepared from the following raw materials: isobutenol polyoxyethylene ether, unsaturated carboxylic acid, unsaturated sulfonate, an ester hydrophobic monomer, an initiator, a chain transfer agent and an alkaline solution. A sulfonic acid group and a hydrophobic ester group with a specific structure are introduced into a polycarboxylic acid molecular structure, so that the adsorption capacity of a polymer is enhanced, the HLB value is reduced, and the effect of reducing the viscosity of concrete is achieved under the action of electrostatic repulsion and steric hindrance. Compared with the prior art, the polycarboxylic acid water reducer has excellent dispersing performance under the condition of low mixing amount, the viscosity of high-strength concrete can be remarkably reduced under the condition of ensuring the workability of the concrete, and the preparation raw materials are wide in source and low in cost and meet the requirement of large-scale production.
本发明属于建筑材料技术领域，具体为一种高强度混凝土降粘型聚羧酸减水剂及其制备方法，通过水溶液自由基聚合反应制得该降粘型聚羧酸减水剂。所述降粘型聚羧酸减水剂的制备原料包括：异丁烯醇聚氧乙烯醚、不饱和羧酸、不饱和磺酸盐、酯类疏水单体、引发剂、链转移剂和碱性溶液。通过在聚羧酸分子结构中引入磺酸基团以及特定结构的疏水酯基，增强聚合物的吸附能力和降低HLB值，在静电斥力和空间位阻的作用下，起到降低混凝土粘度的作用。本发明聚羧酸减水剂在低掺量下，具有优异的分散性能，在保证混凝土和易性的条件下，能显著降低高强度混凝土的粘度，而且制备原料来源广泛，成本较低，符合大规模生产的需求。
High-strength concrete viscosity reduction type polycarboxylate superplasticizer and preparation method thereof
The invention belongs to the technical field of building materials, and particularly relates to a high-strength concrete viscosity reduction type polycarboxylate superplasticizer and a preparation method thereof, and the viscosity reduction type polycarboxylate superplasticizer is prepared through an aqueous solution free radical polymerization reaction. The viscosity reduction type polycarboxylate superplasticizer is prepared from the following raw materials: isobutenol polyoxyethylene ether, unsaturated carboxylic acid, unsaturated sulfonate, an ester hydrophobic monomer, an initiator, a chain transfer agent and an alkaline solution. A sulfonic acid group and a hydrophobic ester group with a specific structure are introduced into a polycarboxylic acid molecular structure, so that the adsorption capacity of a polymer is enhanced, the HLB value is reduced, and the effect of reducing the viscosity of concrete is achieved under the action of electrostatic repulsion and steric hindrance. Compared with the prior art, the polycarboxylic acid water reducer has excellent dispersing performance under the condition of low mixing amount, the viscosity of high-strength concrete can be remarkably reduced under the condition of ensuring the workability of the concrete, and the preparation raw materials are wide in source and low in cost and meet the requirement of large-scale production.
本发明属于建筑材料技术领域，具体为一种高强度混凝土降粘型聚羧酸减水剂及其制备方法，通过水溶液自由基聚合反应制得该降粘型聚羧酸减水剂。所述降粘型聚羧酸减水剂的制备原料包括：异丁烯醇聚氧乙烯醚、不饱和羧酸、不饱和磺酸盐、酯类疏水单体、引发剂、链转移剂和碱性溶液。通过在聚羧酸分子结构中引入磺酸基团以及特定结构的疏水酯基，增强聚合物的吸附能力和降低HLB值，在静电斥力和空间位阻的作用下，起到降低混凝土粘度的作用。本发明聚羧酸减水剂在低掺量下，具有优异的分散性能，在保证混凝土和易性的条件下，能显著降低高强度混凝土的粘度，而且制备原料来源广泛，成本较低，符合大规模生产的需求。
High-strength concrete viscosity reduction type polycarboxylate superplasticizer and preparation method thereof
一种高强度混凝土降粘型聚羧酸减水剂及其制备方法
ZHAO YONG (author) / LIU RUNXIA (author) / CHEN YUJIE (author) / XIE YUXIANG (author) / CHEN YINGYING (author) / LI MIN (author) / LENG BIWU (author) / LIU YANXIN (author) / LI ZIWEI (author)
2023-09-05
Patent
Electronic Resource
Chinese
Viscosity reduction type polycarboxylate superplasticizer and preparation method thereof
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