缓凝剂对碱激发地质聚合物涂层性能的影响  

Effect of Retarders on the Properties of Alkali-activated Geopolymer Coatings

作　　者：任成鑫 于昕 许文龙 徐丽娜[1] 田清波[1] REN Chengxin;YU Xin;XU Wenlong;XU Li'na;TIAN Qingbo(School of Materials Science and Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学材料科学与工程学院,山东济南250101

出　　处：《辽宁化工》2025年第1期87-92,共6页Liaoning Chemical Industry

摘　　要：为研究不同缓凝剂(葡萄糖、蔗糖、葡萄糖酸钠和柠檬酸钾)对碱激发粉煤灰-矿粉基地质聚合物流动度、凝结时间、黏度和力学强度的影响规律,对缓凝剂对碱激发地质聚合物的缓凝机理进行研究。结果表明:4种缓凝剂对地质聚合物浆体流动度的影响均在10%以内;葡萄糖酸钠对地质聚合物浆体凝固时间的延长幅度最大,葡萄糖和蔗糖较大,柠檬酸钾较小;葡萄糖和蔗糖均有增大黏度的作用,且随掺量增加而逐渐增大,葡萄糖酸钠和柠檬酸钾均有减小黏度的作用,且随掺量提高而逐渐减小;缓凝剂延缓了地质聚合物水化作用以及水化物的生长,导致力学性能降低。In this paper,the effects of retarders(glucose,sucrose,sodium gluconate,and potassium citrate) on the fluidity,setting time,viscosity and mechanical strength of alkali-activated fly ash-slag powder based geopolymers were studied,and the retarding mechanism of retarders was analyzed.The results show that the effects of the four retarders on the fluidity of the geopolymer slurry are all within 10%,the sodium gluconate has the largest extension of the solidification time of the geopolymer slurry,the glucose and sucrose are larger,and the potassium citrate is smaller,the viscosity of glucose and sucrose increases and gradually increases with the increase of the dosage,the sodium gluconate and potassium citrate both have the effect of decreasing the viscosity and gradually decreases with the increase of the dosage,and the retarder delays the hydration of the geopolymer and the growth of hydrate,resulting in the decrease of mechanical properties.

关 键 词：碱激发地质聚合物涂层 缓凝剂 流动度 凝结时间 黏度 力学性能 

分 类 号：TU528.042.3[建筑科学—建筑技术科学]