气孔结构对水泥混凝土抗盐冻性能影响的研究  

Relationship between the air void system and frost-salt resistance of concrete

作　　者：沈化荣[1,2] 卢小琳[2] 高培伟[2] 张辉[2] 王珐玮 夏江涛[1] 

机构地区：[1]淮阴工学院土木工程系,江苏淮安223001 [2]南京航空航天大学材料学院,江苏南京210016 [3]吉林省交通科学研究所,吉林长春130012

出　　处：《混凝土》2012年第8期8-9,13,共3页Concrete

基　　金：西部交通项目(2009CB01);"863"国家高新技术项目(2009AA03Z508)

摘　　要：参照CDF盐冻试验标准研究了气泡间距系数对水泥混凝土抗盐冻性能,研究结果表明:混凝土抗盐冻性能随气泡间距系数减小而迅速提高,并具有很好的相关性;当气泡间距系数在0.2 mm以下时,混凝土剥蚀量的下降幅度随气泡间距系数减小而减缓,控制气泡间距系数可很好地改善混凝土的抗盐冻性能。The frost-salt resistances of concrete were investigated according to the CDF method effects of air void systems introduced by differ- ent air entraining agent.The results showed that the frost-salt resistance of concrete increased with the decreasing of spacing factor and increasing of air content.The speed of frost-salt scaling of concrete was reduced when the spacing factor less than 0.200 mm.The results also showed that the frost-salt resistance of concrete of different surface exist difference.The frost-salt resistance of concrete can improve by controlling of the spacing factor not the air content.

关 键 词：混凝土 气泡间距系数 盐冻 含气量 

分 类 号：TU528.01[建筑科学—建筑技术科学]