Effect of Portland Cement versus Sulphoaluminate Cement on the Properties of Blended Lime-Based Mortars Prepared by Carbide Slag

Song Nie; Jianfeng Wang; Mingzhang Lan; Yali Wang; Qiaowei Zhang

doi:10.3390/ma12071012

Effect of Portland Cement versus Sulphoaluminate Cement on the Properties of Blended Lime-Based Mortars Prepared by Carbide Slag

Materials (Basel). 2019 Mar 27;12(7):1012. doi: 10.3390/ma12071012.

Authors

Song Nie¹, Jianfeng Wang², Mingzhang Lan³, Yali Wang⁴, Qiaowei Zhang⁵

Affiliations

¹ College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China. Mrniesong@126.com.
² College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China. wangjianfeng@bjut.edu.cn.
³ College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China. lanmingzhang@bjut.edu.cn.
⁴ College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China. wangyali1978@bjut.edu.cn.
⁵ College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China. zhangqw1991@126.com.

Abstract

In order to improve the properties of lime-based mortars and promote the green development of the construction industry, blended lime-based mortars were prepared by using carbide slag instead of hydrated lime, and the additions of Portland cement and sulphoaluminate cement were studied in our work. The paper focused on mechanical properties, porosity, capillary water absorption and drying shrinkage of both types of blended mortars. The chemical composition and microstructure of hydration products were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that sulphoaluminate cement provided more contributions to mechanical properties, capillary water absorption and early shrinkage compared to Portland cement.

Keywords: capillary water absorption; carbide slag; cement; drying shrinkage; mechanical properties; mortar; porosity.