回弹法检测第Ⅳ类水泥基灌浆材料抗压强度试验研究  

Experimental Study on Compressive Strength of Class Ⅳ Cement-based Grouting Material Tested by Rebound Method

作　　者：陈大川[1] 郭虹位 CHEN Dachuan;GUO Hongwei(Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学,湖南长沙410082

出　　处：《公路工程》2021年第1期184-188,共5页Highway Engineering

基　　金：既有工业建筑非工业化改造技术研究(2016YFC0701308)。

摘　　要：随着城市化建设的进行,各城市地铁建设如火如荼,随之造成大量的地面建筑的沉降破损。在破损建筑加固过程中常采用灌浆料,通过加大截面法、置换法进行加固,参照现行规范,没有针对加固常用的第Ⅳ类灌浆料的回弹规范,因此有必要研究回弹法检测第Ⅳ类水泥基灌浆材料强度的方法。采用ZC3-A型普通混凝土回弹仪和HT450-A型高强混凝土回弹仪采集不同龄期(3、7、14、28 d)的共136组立方体试块回弹值-抗压强度数据,研究了试块回弹值的影响因素,并对数据进行回归分析,建立可靠测强曲线。通过实际工程检验了回弹法测强曲线的准确性,具有较高的精度,为相关规范的编制、工程检测提供依据。With reference to the current specifications,a method for measuring the strength of Type IV cement-based grouting materials by rebound method was studied.The ZC3-A type concrete concrete springback tester and HT450-A high-strength concrete springback tester were used to collect the rebound value-compressive strength data of a total of 136 sets of cubic test blocks at different ages(3 d,7 d,14 d,and 28 d).The influencing factors of the rebound value of the test block were analyzed,and the data was subjected to regression analysis to establish a reliable strength curve.Through the actual project,the accuracy of the rebound method's strength curve was tested,and the accuracy was high,which provided a basis for the preparation of related specifications.

关 键 词：回弹法 水泥基灌浆材料 抗压强度 测强曲线 

分 类 号：TU528[建筑科学—建筑技术科学]