Effect of the Calcium-Silicon Ratio on the Properties of Composite Cementing Materials

IF 1.5 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Transactions of the Indian Ceramic Society Pub Date : 2023-01-02 DOI:10.1080/0371750X.2022.2160375

Yunan Wan, Jianhong Wang, Zhi-yong Li, Hong-ping Zhang

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Abstract

Cement is the most commonly used inorganic cementing material in construction engineering owing to its stable performance; however, cement production requires a considerable amount of energy. To reduce energy consumption, inorganic cementing materials were prepared by solid waste to replace parts of the cement. In this experiment, composite cementing material was prepared by mixing ultrafine fly ash, lime and gypsum; then, this material was hydrated at a calcium-to-silicon (C/S) ratio of 0.6-2.2. The effects of various C/S ratios on the properties of the prepared composite cementing material were investigated. The results showed that when the C/S ratio was 1.6, the compressive and flexural strengths of the composite cementing material reached their maximum. With the increase of C/S ratio, the production of C–S–H gel and ettringite increased; the two products got interwoven, filling the pores of hydration products and increasing the strength of the cementing material. When the C/S ratio was 2.0, the carbonization rate of the cementing materials increased. Calcite coated the surface of the fly ash, preventing the pozzolanic reaction of the fly ash and reducing the overall strength of the material. GRAPHICAL ABSTRACT

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钙硅比对复合胶凝材料性能的影响

水泥性能稳定，是建筑工程中最常用的无机胶结材料;然而，水泥生产需要大量的能源。为降低能耗，采用固体废弃物制备无机胶凝材料替代部分水泥。本试验采用超细粉煤灰、石灰、石膏混合制备复合胶凝材料;然后，将该材料以钙硅比(C/S)为0.6-2.2水化。研究了不同碳硫比对制备的复合胶凝材料性能的影响。结果表明:当C/S比为1.6时，复合胶凝材料的抗压强度和抗弯强度均达到最大;随着C/S比的增加，C - S - h凝胶和钙矾石的产量增加;两种产物相互交织，填充了水化产物的孔隙，提高了胶凝材料的强度。当碳硫比为2.0时，胶凝材料的碳化率增加。方解石包覆在粉煤灰表面，阻止了粉煤灰的火山灰反应，降低了材料的整体强度。图形抽象

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来源期刊

Transactions of the Indian Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.