地区测强曲线的研究

地方测强曲线在回弹法检测商品混凝土抗压强度时优于国家统一曲线,针对庆阳商品混凝土的特点,采用本地区具有代表性的原材料,制作了C10、C15、C20、C25、C30、C35、C40、C45、C50、C55、C60混凝土试块,分为14、28、60、90、120d,5个龄期进行测试,利用最小二乘方法,得到了幂函数形式的回归方程。采用其作为本地区高强混凝土回弹法地方测强曲线。

Reserch on strength curve in Qingyang distinct

The local strength curve of the commercial concrete compressive strength in the rebound method is superior to the national unification curve. In the light of the characteristics of commodity concrete in Qingyang and using the representative raw materials of the region,the concrete samples of C10、C15、C20、C25、C30、C35、C40、C45、C50、C55、C60 are made.Test is divided into five ages for 14、28、60、90、120 days.With the least squares method,we can get the regression equation of power function.it can be used as the local high strength concrete curve of the region by rebound method.