Experimental Research On Mechanical Performance Of Recycled Aggregate Concrete

A great deal of abandoned concrete is produced,because of backouting of constructions, construction of buildings and roud,manufacture of material and so on.The amount of rubbish construction impropriates from 50% to 60% of rubbish city. The aggregate within the abandoned cocnrete being utilized can not only reduce resource being exhausted and being the contradiction of supply and demand, but also alleviate the pollution of the environment by abandoned concrete,its efficiency of economic,social and enviroment toutilize the abandoned cocnrete is notable.The technic of recycled cocnrete is getting more and more attention from lots of countries,being a hot point concerned by the engineering circled and academic circles at home and abroad and one of fronter researching topics.The basic characteristic of recycled aggregate and recycled concrete is main content in the thesis. Compared with natural aggregate, the accumulation density of recycled aggregate is lower, the water absorbing is higher and the crash index is higher. In the experiment, we design 270 standard swatch of cube and 180 standard swatch of prism. In the same mix mix proportion design,we systemly disquisition the replace rate of recycled aggregate(0%,20%,30%,50%,70% and 100%)and ages(7d,28d and 56d) to the influence of the compressive strenght and elasticity module.As shown in the result, the compressive strength development with the increase amount of recycled aggregate replace rate, the disciplinarian of recycled conrete is degressived in the mass. The amount of recycled aggregate replace rate is 50% for the more upper compressive strength.At last, the experiment conclusions are from the academic circles at home and compare with the conclusions in the thesis, we induce the rule of the basic strength property of recycled concrete.