几种超细矿粉抑制混凝土碱骨料反应的试验研究  

Suppressing effect of superfine mineral powder on alkali-aggregate reaction

作　　者：牛全林[1] 冯乃谦[2] 谢威 

机构地区：[1]山东理工大学材料学院,山东淄博255049 [2]清华大学土木工程系,北京100084 [3]潍坊实达建筑公司,山东潍坊261062

出　　处：《水泥工程》2004年第5期12-15,共4页Cement Engineering

摘　　要：利用ASTMC441方法检验了矿物质超细粉对混凝土碱硅酸反应ASR的抑制作用,并利用小混凝土柱法检测了其抑制碱碳酸盐反应ACR的效果。试验表明,矿渣、粉煤灰、沸石等混合材掺入混凝土中均可以抑制ASR的发生,且偏高岭土和沸石粉的效果优于粉煤灰,粉煤灰又优于矿渣。矿物质混合材对ACR膨胀也有抑制作用,但效果不明显,掺30%的粉煤灰和30%A型偏高岭土超细粉试件的28d膨胀率为0.0953%和0.108%,掺加其它混合材的小混凝土柱膨胀率则在0.12%～0.16%之间。The suppression effect of superfine mineral powder on ASR and ACR expansion was investigated according to ASTM C441 and the small concrete prism method respectively. It was shown that the addition of all the supplementary cementing materials such as slag, fly ash and zeolite were able to inhibit the ASR induced expansion, and the effect of metakaolin and zeolite were better than that of fly ash and slag's. The mineral powders were also beneficial for the control of ACR expansion, but not as effective as the suppression effect of ASR, the 28d expansion of the specimens incorporating 30% fly ash or 30% type A metakaolin were 0.0953% and 0.108% respectively, while the other specimens were ranging from 0.12% to 0.16%.

关 键 词：混凝土柱 超细矿粉 碱骨料反应 粉煤灰 偏高岭土 碱碳酸盐反应 碱硅酸反应 ACR 制碱 混合材 

分 类 号：TU528[建筑科学—建筑技术科学] TQ172[化学工程—水泥工业]