硼、钠复合掺杂对贝利特-硫铝酸钙水泥性能及微观结构的影响<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.05.021

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Abstract Belite-calcium sulphoaluminate-ferrite (BCSAF) cement clinker with lower CO₂-emission was prepared from clay, bauxite and calcium carbonate. During the firing process, boron (B) and sodium (Na) were combinedly doped to make the belite (C₂S) more reactive. By mixing the BCSAF clinker with proper amount of anhydrite, BCSAF cement was prepared. Then the effects that B and Na have on the macro-property (compressive strengths development) and micro-structure of cement paste were investigated. Rietveld quantitative phase analysis based on the X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray energy dispersive spectrometer were utilized to study the structure and composition of the cement clinkers and hydrated paste. Results figure out that a proper addition of B and Na helps to stabilize whether α′-C₂S or other C₂S structure with even higher activity at room temperature, thus reducing the β-C₂S proportion. By the combined addition of B and Na, the C₂S mineral in BCSAF clinker is activated, so the early-age compressive strength of the cement paste is improved.

Key words： belite calcium sulfoaluminate combined addition boron sodium

Published: 02 May 2018

CLC number:

TQ172

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	Articles by authors
	WU Mengxue
	YAO Wu
	LI Chen
	LING Qiao

Cite this article:

WU Mengxue,YAO Wu,LI Chen, et al. Effect of Combined Addition of Boron and Sodium on Property and Micro-structure of Beliet-sulphoaluminate Cement[J]. Materials Reports, 2017, 31(5): 128-133.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.05.021 OR http://www.mater-rep.com/EN/Y2017/V31/I5/128

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