活性粉末混凝土受压力学性能试验

Experiment of Mechanical Properties of Reactive Powder Concrete in Compression

采用电液伺服阀控制的刚性试验机对不同钢纤维含量,不同养护条件下的活性粉末混凝土(Reactive Powder Concrete,简称RPC)进行了立方体抗压试验与轴心抗压试验。通过对试件立方体抗压强度的测定,确定了RPC的强度等级。通过对试件轴心受压应力-应变曲线的测试,得到了RPC轴心抗压强度,掌握了轴心受压过程中RPC应力-应变变化规律。同时对不同应力-应变曲线比较,分析了RPC的弹性模量、峰值应变、受压韧性指数等受压力学特性及材料本构关系,并针对结构的正截面承载力计算分析,提出了相应的计算本构模型。对于RPC力学性能的研究可以为实际工程结构的设计提供理论支持。

Cube strength test and axis compression test of reactive powder concrete（RPC） in different steel fiber content and curing conditions were carried out on rigid compression-testing machine controlled by electro hydraulic servo valve.The cube strength was tested to define the strength grade of RPC.By testing the stress-strain curve of prism specimen,the axis compression strength was obtained and the varying regularity of stress-strain of RPC in axis compression was held.At the meantime,by comparing different stress-strain curves,the mechanical properties such as elastic modulus,peak strain,tough index in compression as well as mechanical constitutive relation of RPC were analyzed.And for the sake of designing and analyzing the bearing capacity of normal section of the structure,the constitutive model serving to calculation was put forward.The study on mechanical properties of RPC can provide a theoretical support for the design in actual engineering structures.