水泥乳化沥青砂浆毛细吸水性研究  

Research on the Capillary Absorption of the Cement-Emulsified Asphalt Mortar

作　　者：田冬梅[1] 邓德华[1] 黄波[1] 廖乃凤[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《中国铁道科学》2010年第6期32-37,共6页China Railway Science

基　　金：国家自然科学基金资助项目(50878209)

摘　　要：采用ISAT方法测定水泥乳化沥青砂浆(简称CA砂浆)的毛细吸水速率,研究固灰比(A/C)、孔隙率、试件干密度及拌合物含气量对CA砂浆毛细吸水性的影响。试验结果表明,CA砂浆的总孔隙率影响其强度,而CA砂浆的毛细孔特性才是其毛细吸水性的决定因素;增加固灰比、提高新拌砂浆的含气量、减小砂浆干密度及降低砂浆的毛细孔隙率均可降低CA砂浆的毛细吸水速率;阳离子乳化沥青砂浆的强度及毛细吸水速率均高于阴离子乳化沥青砂浆。The capillary water absorption rate of the cement-emulsified asphalt mortar（CA mortar for short）was measured by the Initial Surface Absorption Test（ISAT）method.The influence of the asphalt-cement ratio（A/C）,the porosity,the dry density of the specimen and the air content of the mixing material on the capillary water absorption rate of CA mortar was researched.The experimental results show that the total porosity of CA mortar influences its strength and the characteristics of the capillary pores are the dominating factor of its capillary water absorption.The capillary water absorption rate of CA mortar can be decreased by increasing the A/C and the air content of the fresh mortar,and decreasing the dry den-sity and the capillary porosity of the mortar specimen.The strength and the capillary water absorption rate of the cationic emulsified asphalt are both higher than that of the anionic emulsified asphalt.

关 键 词：水泥乳化沥青砂浆 毛细吸水性 固灰比 毛细孔隙率 含气量 

分 类 号：U214.16[交通运输工程—道路与铁道工程] TQ177.63[化学工程—硅酸盐工业]