纤维水泥砂浆用先装拔出法检测强度的制订标准研究

借鉴混凝土抗压强度检测方法，对采用9种强度等级纤维水泥砂浆(聚丙烯纤维水泥砂浆、聚乙烯醇纤维水泥砂浆及钢纤维水泥砂浆)加固的混凝土构件加固层进行先装拔出试验，对预留的纤维水泥砂浆试块进行标准立方体抗压强度试验，利用最小二乘法对得到的试验数据进行线性拟合，从而得到3种纤维水泥砂浆强度测强公式，最后对测强公式进行相关性评价，由评价结果可以看出，两者之间线性关系较好.该方法具有较高的精度和实用性，可在工程实践中推广应用.
Referring to the methods and equipment of concrete compressive strength testing, the cast-in-place pull-out test was conducted on concrete specimens, which were reinforced by Polypropylene-Engineered Cementitious Composite, Polyvinyl Alcohol-Engineered Cementitious Composite, steel fiber cement mortar with nine strength grades. And the cube compressive strength test was conducted on fiber reinforced cement mortar specimens, which were reserved. Choosing linear relationship to fit the experimental data by using the method of least squares, this paper obtained three kinds of fiber reinforced cement mortar strength curves. At last, the relevant evaluation between them was carried out. The test data showed that there was a good linear relationship between them. This method has been proved to have very high precision, and can be used to predict fiber reinforced cement mortar compressive strength.