Degradation Law of Material Properties of High Strength Concrete in Deep Topsoil Environment

Abstract

The performance degradation of concrete materials is carried out under the coupling effect of various factors of natural and mechanical environment, which is a very complex process of interaction and superposition, and is also the fundamental reason for the reduction of reliability and life span of concrete structures. There are a lot of corrosive gaseous, liquid and solid media in the environment of reinforced concrete shaft wall, which seriously degrades the properties of reinforced concrete materials. In this paper, the mechanical properties of high-strength concrete are studied through physical simulation test. It is found that the change law of high-strength concrete strength is different in different environments. The compressive strength of high-strength concrete is in a gradually decreasing stage in environment 1 and environment 2, but it is in an increasing stage in environment 3, and then it will enter a decreasing stage with the increase of cycle. The variation law of compressive strength of high-strength concrete in the same strength grade and different environment is also different. Finally, the prediction model of compressive strength degradation of high-strength concrete is established, which provides corresponding guidance for theoretical design and practical engineering.