Study On New Recycling Concrete Wall Properties

Since the 20th century, the rapid growth of the construction industry consumes a lot of environmental resources, at the same time produces large amounts of construction waste. Compared with developed countries, the recycling of construction waste in China is still in its primary stage, the majority of construction waste are used in foundation backfill, belongs to the lower level recycling, its economic benefit and social benefit is not satisfactory. This paper focuses on the intermediate recycling of construction waste, and analyzes the performance of different recycled products by experimental study. Thereby, it seems an answer which to utilize the construction waste that produced during the accelerated process of urbanization in multi-dimension, meanwhile, the pollution issues which cause by stack of construction waste would be settled. The main work in this paper can be summarized as follows:(1) Three types of recycled aggregate with different crushing process are investigated to study aggregate grain size distribution, apparent density, water absorption, crush index, clay content performance. The performance difference of recycled coarse aggregate is analyzed from three aspects:production line, stacked position, comparison with natural coarse aggregate. Providing actual preparation technology reference for recycled aggregates.(2) Fourteen types of recycled concrete brick with different mixture ratio and production technology are investigated to study compressive strength, moisture content, water absorption and drying shrinkage performance. Analyzing the influence of brick particles and obtaining optimal replacement rate of brick particles and reasonable production process.(4) Based on the low cyclic loading test of five new material walls, the recycled concrete brick and recycled concrete lightweight partition board as a non-load-bearing system are investigated to study the form of damage, load capacity, deformation performance. This section analyze the walls’ performance, such as column longitudinal reinforcement strain, walls strain, hysteresis curves, skeleton curves, ductility ratio, lateral angle, and considering the influence of the vertical compressive stress. The test results is compared with ordinary concrete brick and recycled concrete block walls.