粉煤灰混凝土早龄期回弹法测强曲线的试验研究  

Experimental study of fly ash concrete early age rebound strength curve

作　　者：胡晓鹏[1] 牛荻涛[1] 张永利[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《混凝土》2011年第7期101-103,共3页Concrete

基　　金：国家杰出青年科学基金项目(50725824);国家"十一五"科技支撑项目(2006BAJ03A02-03)

摘　　要：建立粉煤灰混凝土早龄期回弹法测强曲线,为将回弹法应用于早龄期粉煤灰混凝土的强度监测和质量控制提供科学依据,具有重要的现实意义和工程应用价值。选取粉煤灰掺量为0、10%、20%和30%,混凝土设计强度等级为C30、C40和C50的粉煤灰混凝土为研究对象,通过试验研究了粉煤灰混凝土浇筑后90 d内抗压强度与回弹值和碳化深度之间的关系,建立了不同粉煤灰掺量混凝土早龄期回弹法测强曲线,强度误差满足《回弹法检测混凝土抗压强度技术规程》的要求。Establishing fly ash concrete early age rebound strength curve, the rebound method is applied to early age strength of fly ash concrete monitoring and quality control,which has important practical significance and engineering value.Fly ash 0,10% ,20%and 30%concrete design strength grade C30,C40 and C50 is selected for the study,the calculation model of fly ash concrete early age carbonation depth is established through experiment, the relationship among compressive strength, rebound values and the carbonation depth within 90 days aider pouring is analyzed, the rebound regression equation of different fly ash content is established, the error meet the requirements of ＂Rebound Technical Specifica- tion for concrete compressive strength test＂.

关 键 词：粉煤灰混凝土 早龄期 回弹法 测强曲线 

分 类 号：TU528.07[建筑科学—建筑技术科学]