Formation Mechanism and Performance of Polymer Cement Concrete Composite Structure

Abstract

Ordinary cement concrete has the shortcomings of a brittle material with large elastic modulus, low compressive and flexural strength, too high rigidity, insufficient flexibility, small deformation ability, and low durability. In large-scale bridge projects such as the bridge deck paving project of the steel laminated beam composite structure, diseases such as cracks and plate damage are prone to occur. At the same time, the environment is constantly changing, and the harsh environment may cause serious damage and destruction to the concrete. Especially in the environment of medium and high humidity, high temperature, high salt pollution, and high acid mist condensation, there are many problems of peeling of concrete protective layer and corrosion of steel. Therefore, people have been looking for ways to improve cement concrete, and later discovered that adding polymers to concrete can improve the most basic properties of concrete, reduce concrete rigidity, increase flexibility, and reduce the ratio of compressive strength to flexural strength. The concrete made by adding polymer is called polymer cement concrete composite. In this paper, through the experiment of incorporating polymers and some other substances, it is concluded that when the ratio of polymer to ash is 15%, the amount of defoamer is 7%. When the fiber content is 0.2%, the performance of the composite material is the best.