全级配混凝土极限拉伸值试验方法的探讨

A Testing Method Discussion for Full Arrangement Concrete

本文以Weibull理论为依据，肯定了轴心拉伸试验在全级配混凝土极限拉伸值测定中的地位，比较了立式轴心受拉与卧式轴心受拉试验的优点及存在的问题。并由10cm×10cm×10cm立方体受压与10cm×10cm×55cm棱柱体轴心受拉的对比试验发现：一级配混凝土的理论极限拉伸值约为其轴心受拉时的极限拉伸应变的0．85－0．95倍。在此基础上，提出了由全级配混凝土受压试验确定全级配混凝土极限拉伸值的试验方法，可供有关试验单位参考。

Based on Weibull theory,it can be deduced that axial tensile test isthe best testing method for extensibility of tull arrangement concrete.Thispaper has comparied the merits and the demerits between perpendicular axial ten_sileand horizontal axial tensile test. Some problems in the two kinds of testingmethods have also been pointed out.Whith 10cm*10cm*10cm cube specimens and 10cm*10cm*55cm prism specimens,uniaxial compressive and uniaxial tensile tests have been studied.It is founded that the theoritical extensibility of single ar-rangement concrete is about 0.85-0.95 times to the extensibility measureed from uniaxial tensile specimens.At last,a new testing method has been designedfor relevant departments.