Hydration kinetics and phase evolution of Portland cement composites containing sodium-montmorillonite functionalized with a Non-Ionic surfactant
Hydration kinetics and phase evolution of Portland cement composites containing sodium-montmorillonite functionalized with a Non-Ionic surfactant
复制标题
DOI：
10.1016/j.conbuildmat.2022.127386
复制
发表时间：
2022-04-08
影响因子：
7.4
通讯作者：
Wei, Jianqiang
中科院分区：
文献类型：
--
作者：
Luo, Dayou;Wei, Jianqiang
研究了含蒙脱土（MT）的波特兰水泥复合材料的水化行为和相演化，旨在通过非离子表面活性剂（聚乙二醇醚）的功能化，解决MT分散性差、物理性能和化学反应性差的问题。功能化后，MT表现出增大的层间距（122%），有机化学键插入，改善在混凝土孔溶液中的分散性，降低吸湿能力。与未处理的MT相比，功能化MT的水泥复合材料的水泥水化程度提高，硅酸盐矿物减少，硅酸钙水合物（C-S-H）和含铝水合物增多，微观结构更加致密，强度更高。
This study investigates the hydration behavior and phase evolution of portland cement composites containing montmorillonite (MT) with an objective to address the poor dispersion and improve physical features and chemical reactivity of MT through functionalization with a non-ionic surfactant (polyethylene glycol ether). After functionalization, the MT exhibited an enlarged layer spacing (122%), organic chemical bonds intercalated, improved dispersion in concrete pore solutions, reduced moisture sorption capacity. The cement composites containing the functionalized MT showed enhanced cement hydration, less portlandite, more calcium silicate hydrates (C-S-H) and aluminum-containing hydrates, a more densified microstructure, and higher strength than the composites with raw MT.