粉煤灰对沙漠砂混凝土抗压强度及抗冻性能影响试验研究  

Experimental Study on the Effect of Fly Ash on Compressive Strength and Frost Resistance of Desert Sand Concrete

作　　者：杜勇刚 孙帅 DU Yonggang;SUN Shuai(Middle East Branch of China MCC 17 Group Corporation Ltd.,Ma′anshan Anhui 243001,China;School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]中国十七冶集团有限公司中东分公司,安徽马鞍山243001 [2]宁夏大学土木与水利工程学院,银川750021

出　　处：《重庆科技学院学报（自然科学版）》2018年第6期71-74,93,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家自然科学基金项目"沙漠砂混凝土动态破坏机理"(11162015)

摘　　要：通过沙漠砂混凝土养护期7、28 d的抗压强度及抗冻性能试验,观察粉煤灰掺量对抗压强度和抗冻性能的影响规律。试验结果表明:抗压强度随着粉煤灰掺量增多而呈先上升后下降的趋势;当粉煤灰掺量为10%时,沙漠砂混凝土养护期7、28 d的抗压强度均达到最大值;随着冻融循环次数增加,沙漠砂混凝土质量损失率和动弹模量损失率均呈递增趋势;沙漠砂混凝土各次冻融后动弹模量随着粉煤灰掺量增多而呈先上升后下降的趋势,当粉煤灰掺量为10%时,冻融后各次动弹模量达最大值。The fly ash concrete 7 d,28 d compressive strength and frost resistance performance test is carried out about the desert sand in different dosage to analyze the influence law of different dosage of fly ash on compressive strength and frost resistance. The test results show that the compressive strength of desert sand concrete for 7 d and28 d increases with the increase of fly ash content,and then decreases at different rates. When the fly ash content is10%,the compressive strength of desert sand concrete reaches the maximum value of 7 d and 28 d. With the increase of freeze-thaw cycles,the quality loss rate and dynamic modulus of desert sand concrete are both increasing. The dynamic modulus of desert sand concrete after each freeze-thaw increases with the increase of fly ash content. When the fly ash content increases by 10%,the dynamic modulus of each time after freeze-thaw reaches the maximum value.

关 键 词：单因素试验 质量损失率 抗压强度 动弹模量 

分 类 号：TU528[建筑科学—建筑技术科学]