Research on the evaluation of heat resistance, sound insulation, economy and environmental protection performance of recycled plastic concrete based on the optimized proportion

Abstract With the rapid development of cities, the problem of environmental sustainability has become increasingly prominent, and it is increasingly important to build a socially resilient city. This research focuses on white pollution-the recycling of waste plastics in concrete in the city and the comfort of the urban living environment, from the perspective of concrete materials. Firstly, the proportion of recycled plastics, natural aggregate, water-cement ratio, and other parameters were optimized, and then the heat resistance, sound insulation, economic and environmental protection performance of the optimized concrete were studied. The results showed that the optimal proportion of recycled plastic concrete was obtained, and the strength deterioration mechanism was revealed. The maximum suitable use temperature of recycled plastic concrete is around 75 ℃. Recycled plastic concrete has better sound insulation performance for unsteady sound, human sound and mechanical sound. In terms of economic and environmental performance, the cost of raw materials of recycled plastic concrete is not dominant, and the water-soluble extracts have little impact on the environment. The research results are expected to provide a theoretical basis for the realization of urban environmental sustainable development.