先装拔出法检测水泥砂浆薄层强度现场试验研究

Field Test Research on Strength of Cement Mortar Thin Layer Detected by Cast-in-place Pullout Method

通过对加固工程施工现场的烧结普通粘土砖墙体进行钢筋网水泥砂浆薄层加固,分别进行先装拔出法检测和标准立方体抗压强度测试.现场试验采用M10,M15,M20,M25,M30,M35,M40,M45,M50九个强度等级的水泥砂浆,共设置54个试验组.根据试验结果,拟合出了先装拔出法检测水泥砂浆薄层抗压强度的公式,并对回归方程进行模型检验,提出了水泥砂浆抗压强度个别值的区间预测.本文为水泥砂浆先装拔出法现场检测技术的推广应用和相关技术标准的制订提供了依据.

Based on a local project of the sintered brick wall reinforced with steel mesh cement mortar, pullout inspection and standard cube compressive strength test were constructed.The field test adopts nine kinds of cement mortar with a strength grade of M10,M15,M20,M25,M30,M35,M40,M45,M50. According to the test results,we have obtained the formula of compressive strength of cement mortar thin layer detected by cast-in-place pullout method,inspected the model of linear regression equation and proposed the interval estimation for the individual value of the compressive strength of cement mortar,This paper provides not only a basis for technology popularization and application of cast-in-place pullout method ,but also a basis of the establishment of relevant technical standards for cement mortar field tests.