多孔混凝土基层的应力-应变特性

Stress-strain character of porous concrete base

为进行多孔混凝土基层路面的结构设计,需研究其应力-应变特性。通过小梁试件三分点加荷试验及棱柱体试件轴心抗压试验,分别测试多孔混凝土的弯拉弹性模量与轴心抗压弹性模量。对试验结果进行回归分析,得出多孔混凝土弯拉弹性模量与弯拉强度、抗压弹性模量与轴心抗压强度之间分别符合相关性良好的幂指数关系,并据此得出多孔混凝土弯拉弹性模量与弯拉强度、抗压弹性模量与轴心抗压强度的对应关系表,作为其弹性模量的推荐值。

The stress-strain character of porous concrete should be studied for the pavement structure design with porous concrete base.With the tests of third point loading to small beam specimens and the axial compressive tests to prism specimens, the flexural tensile elastic modulus and axial compressive elastic modulus were tested separately.Through regression analysis of the test results, it can be drawn that there are fine power exponent relationships between flexural tensile elastic modulus and flexural tensile strength,compressive elastic modulus and axial compressive strength of porous concrete.The corresponding table of flexural tensile elastic modulus and flexural tensile strength, compressive elastic modulus and axial compressive strength of porous concrete are put forward according to the formulas,which can be taken as the recommendation modulus values.