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引用本文:	杨建明,杜玉兵,徐选臣.石灰石粉对磷酸镁胶结材料浆体性能的影响[J].建筑材料学报,2015,18(1):38-43

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石灰石粉对磷酸镁胶结材料浆体性能的影响
杨建明¹, 杜玉兵², 徐选臣²
1.盐城工学院江苏省新型环保重点实验室,江苏盐城224051;2.盐城工学院土木工程学院,江苏盐城224051

摘要:

为了研究石灰石粉对磷酸镁胶结材料（MPC）浆体性能的影响，测试了含石灰石粉MPC浆体的凝结时间、抗压强度、收缩变形和水化温度，分析了含石灰石粉MPC浆体的物相组成和微观形貌.结果表明：掺加适量石灰石粉可明显提高MPC浆体的抗压强度并改善其收缩变形.适量石灰石粉掺加后，MPC浆体早期水化程度显著增加，MPC浆体中主要水化产物MgKPO4·6H2O的结晶程度、生成量和生成比例明显提高，晶体形貌和大小发生了变化，MPC硬化体结构更加致密.

关键词: 磷酸镁胶结材料石灰石粉强度水化温度微观结构

DOI：103969/jissn1007 9629201501007

分类号:

基金项目:江苏省新型环保重点实验室开放项目(AE201022)；住房与城乡建设部科研开发项目（2011 K4 23，2013 K7 4，2013 K4 41）；江苏省科技厅项目（BY2013057 05）

Effect of Limestone Powder on Properties of Magnesium Phosphate Cement Paste

YANG Jianming¹, DU Yubing², XU Xuanchen²

1.Key Laboratory for Advanced Technology Environment Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, China;2.School of Architecture and Construction, Yancheng Institute of Technology, Yancheng 224051,China

Abstract:

To study effect of limestone powder on the properties of magnesium phosphate cement(MPC） paste, the initial setting time, compressive strength, shrinkage deformation and hydration temperature of MPC paste with limestone powder added were investigated, the phase composition and micro morphology of MPC paste with limestone powder added were analyzed. The results show that some limestone powder added significantly improves the compressive strength and shrinkage deformation of MPC paste. Some limestone powder added remarkably improves early hydration degree of MPC paste, and increases the crystal degree, formation amount and ratio of main hydration MgKPO4·6H2O, and change the shape and size of crystal MgKPO4·6H2O, resulting in the more compact structure of hardened MPC paste.

Key words: magnesium phosphate cement(MPC) limestone powder strength hydration temperature microstructure