西安理工大学学报2016，Vol.32Issue(4)：421-427,7.DOI:10.19322/j.cnki.issn.1006-4710.2016.04.008
GLP对混凝土微观结构及抗碳化性能影响机理
Influence of GLP on microstructure and its action mechanism of carbonation resistance of concrete
摘要
Abstract
The influence of ground limestone powder(GLP)which replaces cement by mass on mi-crostructure and its action mechanism of carbonation resistance of concrete are analyzed.The al-kaline matter reserved in pore solution of paste in concrete with different replacements of cement by GLP by mass is observed through the pH value test.The influence of GLP on pore structure characteristics of hydration products of concrete is investigated by method of mercury intrusion porosimeter (MIP)and the carbonation resistance of GLP concrete is tested.Results indicate that the replacements of cement by GLP will affect the pH value of pore solution inside the concrete. The pH value decreases with the increase of the replacements of cement by GLP.The reduction of the alkaline matter reserved in per unit volume concrete weakens the carbonation resistance of concrete.The replacements of cement by GLP change the distribution feature of classification po-rosity of paste in concrete.The porosity and the classification porosity percent of harmful pore with pore diameter in range of 50~200 nm increase significantly with the total porosity of paste in concrete with GLP obviously increasing,weakening further the carbonation resistance of con-crete.The carbonation resistance of concrete could be improved appropriately by increasing the specific surface area of GLP and decreasing the water-bind ratio of concrete.关键词
GLP/混凝土/pH值/MIP/微观结构/碳化Key words
GLP/concrete/pH value/MIP/microstructure/carbonation分类
建筑与水利引用本文复制引用
贾福萍,吕恒林,储宛珍,席新雅,李勇,王茜..GLP对混凝土微观结构及抗碳化性能影响机理[J].西安理工大学学报,2016,32(4):421-427,7.基金项目
国家自然基金青年基金资助项目（51408597）；江苏省重点实验室开放基金资助项目（JSKL2011YB05）；中国高校基本科研业务费专项基金资助项目（2011QNB20）；中国矿业大学科研创新训练计划资助项目（XZD1029014183）；国家级大学生创新训练计划资助项目 （）
