盐酸环境下粉煤灰混凝土的冻融循环衰减特性研究  

Study on the attenuation characteristics of the freeze-thaw cycle of fly ash concrete under hydrochloric acid environment

作　　者：李肖[1] LI Xiao(College of Architectural Engineering,Liaocheng University,Liaocheng 252000,China)

机构地区：[1]聊城大学建筑工程学院,山东聊城252000

出　　处：《四川建筑科学研究》2019年第2期6-8,共3页Sichuan Building Science

基　　金：国家自然科学基金面上项目(51608534)

摘　　要：为了获得盐酸环境下冻融循环对粉煤灰混凝土强度特性的影响,开展快速冻融试验对不同粉煤灰添加量的粉煤灰混凝土在不同pH值盐酸环境下的冻融循环衰减过程进行了研究。研究发现,粉煤灰混凝土的耐酸性能要明显优于普通混凝土,随着冻融循环次数的增加,盐酸环境下粉煤灰混凝土的抗压强度整体呈现衰减趋势,但是当粉煤灰的添加量较大、冻融循环次数较少时,其抗压强度明显增强。随着冻融循环次数的增加,盐酸环境的pH值越小,粉煤灰混凝土的抗压强度衰减也越明显。In order to obtain hydrochloric acid environment under the influence of the freeze-thaw cycle of fly ash concrete strength characteristics,carry out the fast freeze-thaw test with different adding amount of fly ash concrete of fly ash in different pH hydrochloric acid to study the freeze-thaw cycle attenuation process.The study finds that the fly ash concrete acid proof performance is significantly better than that of ordinary concrete,with the increase of freeze-thaw cycles of hydrochloric acid environment present the attenuation trend of fly ash concrete compressive strength,but when adding of fly ash is high,freeze-thaw cycles with its compressive strength increase.The lower the pH value of the hydrochloric acid environment,the more obvious the decrease of compressive strength of fly ash concrete with the increase of freeze-thaw cycles.

关 键 词：粉煤灰混凝土 盐酸环境 抗压强度 冻融循环 

分 类 号：TU528[建筑科学—建筑技术科学]