粉煤灰掺量对混凝土抗氯离子渗透性的影响  

EFFECT OF THE FLY ASH CONTENT ON CONCRETE IMPERMEABILITY TO CHLORIDE ION

作　　者：季晓霞[1] 霍俊芳[1] 李金帅 

机构地区：[1]内蒙古工业大学土木工程学院,呼和浩特010051 [2]呼铁局科研所,呼和浩特010018

出　　处：《内蒙古工业大学学报（自然科学版）》2010年第2期149-153,共5页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：内蒙古自治区自然科学基金资助项目(200711020715)

摘　　要：本文采用ASTMC1202的方法对不同粉煤灰掺量的混凝土抗氯离子渗透性能进行试验研究．研究结果表明：在保持水灰比不变的前提下，以粉煤灰取代部分水泥，当粉煤灰掺量在25％～45％时，混凝土6h通过的电通量显著降低．但当粉煤灰掺量超过45％后，电通量开始呈现上升的趋势．但总的来说，6h通过的电通量还是很小的，在270～650℃之间，属于渗透能力很低的混凝土，可以满足抗渗性混凝土的要求．Effects of fly ash content on the resistance to chloride permeability of concrete are investigated by ASTM C 1202 Method. The results show that electric flux through concrete in six hours has been significantly reduced when 25%-45% content of cement is replaced by fly ash based on the same water-cement ratio. But,when the fly ash content are more than 45% .the electric flux through concrete is beginning to show an upward trend, but overall ,electric flux through concrete is very small,between 270 ℃ and 650 ℃. Concrete mixed fly ash is low permeable and can globally meet the requirements of impermeability of concrete in this experiment.

关 键 词：粉煤灰 氯离子 混凝土渗透性 电通量 

分 类 号：TU528[建筑科学—建筑技术科学]