期刊论文

Effect of Melamine Water Reducer on Fluidity and Mechanical Properties of Alkali-Activated Ultrafine Metakaolin Based Geopolymer

中文

硅酸盐通报

1001-1625

2020

39

6

1828-1834

10.16552/j.cnki.issn1001-1625.2020.06.020

国家重点研发计划(2016YFC0802400) 湖南省创新平台开放基金(18K075)。

本校为第一机构

以超细偏高岭土(UMK)为原材料,研究了三聚氰胺减水剂(MWR)对碱激发偏高岭土基地质聚合物的流动性能和力学性能的影响.采用流变学方法表征地聚物净浆的流动性,结合凝结时间实验、含水率实验和力学性能实验研究了MWR在地质聚合反应中的作用.通过SEM、FTIR和XRD等分析手段研究反应产物的微观形貌、化学结构和矿物组成,以揭示MWR的作用机理.结果 表明,MWR与UMK相容性不好,MWR掺量为2wt％和4wt％时对地聚物净浆的流动性有一定改善,但掺量6wt％时明显促进了净浆的流动度损失.MWR的掺入改变了地聚物的孔隙结构,促进了水分的散失,从而使抗压强度随MWR掺量的增大而先减小后有所回升.

Ultrafine metakaolin(UMK)was used as raw material to study the effect of melamine water reducer(MWR)on the fluidity and mechanical properties of alkali-activated metakaolin based geopolymer.The fluidity of geopolymer slurry was characterized by rheological method,and the effect of MWR on the reaction was also studied via tests for setting time,moisture content and mechanical property.The micromorphology,chemical structure and mineral composition of the geopolymer were studied with SEM,FTIR and XRD analysis to reveal the reaction mechanism of MWR in UMK based geopolymer.The results show that th...