【摘 要】
：
Calcium phosphoaluminate solid solution (LHss) was the main phase of phosphoaluminate cement (PALC),which exhibited good strength development.Based on this, a series of new cement minerals, Ba-bearing
【机 构】
：
Shandong provincial key Laboratory of preparation and measurement of building materials, University
【出 处】
：
The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
Calcium phosphoaluminate solid solution (LHss) was the main phase of phosphoaluminate cement (PALC),which exhibited good strength development.Based on this, a series of new cement minerals, Ba-bearing calcium phosphoaluminate solid solution, were synthesized in this paper.Its composition and microstructure were investigated by means of X-ray diffraction, DSC-TG, SEM-EDS, MIP and hydrated heat analysis.X-ray diffraction analysis showed that the substitution of Ba2+ for Ca2+ can effectively change the crystal structure of L phase and improve its hydration activity with the content of BaO rise.Whereas, when the content of BaO exceeded 20%, the mineral of BaO·Al2O3 was formed due to the combination of BaO and Al2O3.DSC-TG and SEM-EDS results revealed that the hydration products of LHss phase were modified by the substitution of Ba2+ for Ca2+, which endowed Ba-bearing LHss phase with much higher strength evolution.
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