Liu Guide, Zheng Xin, Xie Guoliang, Liu Gongliang
College of Civil Engineering and Water Conservancy, Heilongjiang Bayi Agricultural University, Daqing, China.
Des Monomers Polym. 2024 Jul 6;27(1):51-61. doi: 10.1080/15685551.2024.2376780. eCollection 2024.
To explore the effect of polycarboxylate superplasticizers on the strength and hydration performance of alkali slag building materials, this study prepared cross-linked polycarboxylate superplasticizers with different ratios of hydrogen peroxide, methyl allyl alcohol polyoxyethylene ether, acrylic acid, polyethylene glycol diacrylate, monomer aqueous solution, reducing agent, chain transfer agent, etc. according to certain ratios, and tested their effects on the hydration performance and strength of alkali slag building materials. Through experimental analysis, it was found that the higher the proportion of cross-linked polycarboxylate based high-efficiency water-reducing agents, the lower the initial flowability of building material slurry; The addition of cross-linked polycarboxylate water-reducing agent will prolong the initial and final setting time of alkali slag building materials, delaying the hydration time of building materials; Cross linked polycarboxylate superplasticizers can reduce the electrical conductivity of alkali slag building material slurry, delaying its hydration rate; Different ratios of water-reducing agents have a significant impact on the water reduction rate of alkali slag building materials, with V2 water-reducing agent having the highest water-reduction rate of 28.6%; Cross linked polycarboxylate superplasticizers can increase the flexural and compressive strength of alkali slag building materials. Therefore, cross-linked polycarboxylate water-reducing agents have shown great potential in regulating the properties of alkali slag building materials.
为探究聚羧酸系高效减水剂对碱矿渣建筑材料强度及水化性能的影响，本研究按照一定比例制备了由过氧化氢、甲基烯丙醇聚氧乙烯醚、丙烯酸、聚乙二醇二丙烯酸酯、单体水溶液、还原剂、链转移剂等组成的交联聚羧酸系高效减水剂，并测试其对碱矿渣建筑材料水化性能及强度的影响。通过试验分析发现，交联聚羧酸系高效减水剂比例越高，建筑材料浆体的初始流动性越低；交联聚羧酸系减水剂的加入会延长碱矿渣建筑材料的初凝和终凝时间，延缓建筑材料的水化时间；交联聚羧酸系高效减水剂可降低碱矿渣建筑材料浆体的电导率，延缓其水化速率；不同配比的减水剂对碱矿渣建筑材料的减水率有显著影响，其中V2减水剂的减水率最高，为28.6%；交联聚羧酸系高效减水剂可提高碱矿渣建筑材料的抗折和抗压强度。因此，交联聚羧酸系减水剂在调控碱矿渣建筑材料性能方面展现出巨大潜力。
