Influence of catalytic nano-additive for stabilization of β-dicalcium silicate and its hydration rate with different electrolytes

被引：28
作者：
Maiti, Sanat Chandra [1 ]
Ghoroi, Chinmay [1 ]
机构：
[1] Indian Inst Technol Gandhinagar, DryProTech Lab, Chem Engn, Gandhinagar 382355, Gujarat, India
来源：
CEMENT AND CONCRETE RESEARCH | 2017年 / 98卷
关键词：
Dicalcium silicate; beta-C2S; gamma-C2S; Phase stabilization; Hydration; Nano-additives; Micron-additive; TRICALCIUM SILICATE; TIO2; NANOPARTICLES; CRYSTAL-STRUCTURE; STABILITY; KINETICS; REFINEMENT; MICROSTRUCTURE; CHEMISTRY; ANATASE; SODIUM;
D O I：
10.1016/j.cemconres.2017.04.008
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The influence of nano-additives (nano-TiO2 and nano-MgO) on stabilization of beta-dicalcium silicate (beta-C2S) was investigated and compared with corresponding micron size additives. The effectiveness of phase stabilization with different wt% of nano- and micron-additives along with the influence of sintering temperature on stabilization of beta-C2S were studied using Rietveld refinement of XRD data. In addition, hydration study of beta-C2S stabilized by nano-additive was also carried out in the presence of CaCl2, NaCl, NaOH and distilled water. The rate of hydration and influence of different electrolytes were analyzed by TG and DTG curve. The result shows that nano-TiO2 provides a catalytic effect on phase stabilization even at very low wt%. The hydration result of beta-C2S stabilized by nano-TiO2 indicates that electrolyte solution and its ion play an important role towards hydration kinetics. The morphology of the C-S-H phase strongly depends on the electrolyte solution used for the hydration.
引用
收藏
页码：111 / 121
页数：11
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