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

IF 10.9 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement and Concrete Research Pub Date : 2017-08-01 DOI:10.1016/j.cemconres.2017.04.008

Sanat Chandra Maiti, Chinmay Ghoroi

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引用次数: 20

Abstract

The influence of nano-additives (nano-TiO₂ and nano-MgO) on stabilization of β-dicalcium silicate (β-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 β-C₂S were studied using Rietveld refinement of XRD data. In addition, hydration study of β-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 β-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.

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催化纳米添加剂对β-硅酸二钙稳定性及与不同电解质水化率的影响

研究了纳米添加剂(纳米tio2和纳米mgo)对β-硅酸二钙(β-C2S)稳定性的影响，并与相应的微米级添加剂进行了比较。利用XRD数据进行Rietveld细化，研究了不同wt%纳米和微米添加剂对β-C2S的稳定效果以及烧结温度对稳定效果的影响。此外，还进行了纳米添加剂稳定β-C2S在CaCl2、NaCl、NaOH和蒸馏水存在下的水化研究。通过TG和DTG曲线分析了不同电解质对水化速率的影响。结果表明，即使在很低的wt%下，纳米tio2对相稳定也有催化作用。纳米tio2稳定β-C2S的水化结果表明，电解质溶液及其离子对水化动力学起重要作用。C-S-H相的形态在很大程度上取决于用于水化的电解质溶液。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cement and Concrete Research 工程技术-材料科学：综合

CiteScore

20.90

自引率

12.30%

发文量

318

审稿时长

53 days

期刊介绍： Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.