安徽地区泵送混凝土回弹法测强曲线的试验研究

发布时间：2018-03-02 23:08

本文选题：回弹法　切入点：测强曲线　出处：《合肥工业大学学报(自然科学版)》2017年06期 　论文类型：期刊论文

【摘要】：由于回弹法国家测强曲线换算的强度与地区混凝土的实际强度有较大误差,文章采用安徽省常用的混凝土原材料在安徽各市搅拌站制作试件,分别在各市开展回弹值、碳化深度、混凝土强度试验,共采集了5 756组数据,利用最小二乘法进行了线性函数、二次函数、三次函数、对数函数、幂函数和指数函数形式回归拟合。对回归曲线进行误差分析和相关性分析,分析结果与国家测强曲线进行了对比,结果表明,安徽地区测强曲线测试精度比国家测强曲线高。通过9个实际工程或试验试件检测数据验证,安徽地区测强曲线满足测试精度要求并可以作为适用于安徽地区回弹法检测混凝土强度的测强曲线。
[Abstract]:Because there is a great error between the conversion of the rebound strength curve and the actual strength of concrete in the region, the paper uses the common concrete raw materials in Anhui Province to make the specimens at the mixing stations in various cities of Anhui Province, and carries out the rebound values in each city, respectively. In carbonation depth and concrete strength test, 5,756 groups of data were collected. Linear function, quadratic function, cubic function, logarithmic function were carried out by least square method. Regression fitting in the form of power function and exponential function. Error analysis and correlation analysis of the regression curve are carried out. The results are compared with the national strength measurement curve. The results show that, The measuring accuracy of the intensity curve in Anhui area is higher than that of the national intensity curve. The strength curve of Anhui area can meet the requirement of testing precision and can be used as the strength curve of concrete strength test by rebound method in Anhui area.
【作者单位】：合肥工业大学土木与水利工程学院;安徽省水利部淮河水利委员会水利科学研究院;
【基金】：安徽省建设厅科技资助项目(建标[2013]56)
【分类号】：TU528.53

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