Research On Performance Of Rubberized Concrete

In recent years, with the continuous development of concrete technology, concrete strength increasing, the inherent brittleness show highlights problems, how can guarantee the strength of concrete, but they can improve their brittle fracture characteristics become more and now works in practice the more questions to get people’s attention. After exploring domestic and foreign scholars study found that the incorporation of rubber powder in concrete is one way to improve this problem.Rubberized Concrete as a new type of concrete material, a collection of some of the excellent features of rubber and ordinary concrete, including:low elastic modulus, excellent deformation properties and crack resistance, high energy absorption capacity and very high toughness. Other features include light weight, high hardness, elongation, good anti-wear and anti-aging properties, shrinkage coefficient and low coefficient of thermal expansion. In addition, crumb rubber concrete also has good heat insulation, sound insulation function. If rubberized concrete used in engineering practice, can be very good to improve the fatigue resistance of structures or components, but domestic and international aspects of the fatigue properties of rubber concrete damage evolution mechanism, the fatigue checking methods and engineering applications little research. In view of this, this article will fatigue properties of rubberized concrete flexural test study, the main contents include:1. In ordinary concrete C40is based on the rubber powder with an equal volume of alternative ways of fine aggregate concrete alternative to study the modified concrete apparent in different content and different rubber powder rubber powder particle density, gas content, slump degree, compressive strength, flexural strength;2. Rubberized Concrete specimens of different size and different contents were amplitude cyclic loading fatigue testing, was found to have certain characteristics when shaping the future of concrete specimens modified static damage, at the same stress level, change after the fatigue properties of the concrete specimen is superior to unmodified concrete specimens, and with changes in content and particle size of the rubber powder has certain laws;3. Fatigue life of rubberized concrete testing under different stress levels Weibull probability distribution to calculate the probability of failure fatigue life under different rubberized concrete, By calculation, the equation given in double logarithmic fatigue under different failure probability and calculate the fatigue strength of rubberized concrete through fatigue equation, and analyze the mechanism of fatigue damage.