论文部分内容阅读
本文总结了在一次加压和周期性的单轴向压力下,对混凝土砂浆成分的性能所作的研究。我们采用了两种拌合料,相当于水灰比为0.5和0.6的混凝土配合比。每组三个试件,共44组,在龄期为5～70天时进行试验。用六种不同的加载方式,求得一次加载和周期性加载(包括规定应变的循环)的完整包络线,主要重点放在相当高的应力循环的试验上。我们用累计的残余应变和初始弹性模量的变化,来判断破坏和结构的变化。最大应变看来是控制砂浆破坏的主要因素,但是总的周期性应变的幅度和荷载的循环次数也起着重要的作用.混凝土和砂浆的性能极其相似,这说明砂浆的成分可能控制混凝土的主要的应力一应变性能。
This article summarizes the study of the properties of concrete mortar compositions under a single pressurization and cyclic uniaxial pressure. We use two kinds of mixes, which is equivalent to the concrete mix ratio of 0.5 to 0.6. Each group of three test pieces, a total of 44 groups, was tested at an age of 5 to 70 days. With six different loading methods, complete envelopes of one loading and periodic loading (including a prescribed strain cycle) are obtained, with the main emphasis placed on tests of relatively high stress cycles. We use the cumulative residual strain and change in initial elastic modulus to determine damage and structural changes. The maximum strain appears to be the main factor controlling the damage of the mortar, but the magnitude of the total cyclic strain and the number of cycles of the load also play an important role. The performance of the concrete and the mortar is extremely similar, which indicates that the composition of the mortar may dominate the concrete. The stress-strain properties.