An Experiment Research On Road Engineering Of Recycled Aggregate From Abandoned Concrete

With the rapid development of the building industry, the building waste produced in the architecture industry also increase rapidly, which influences the environment and is harm to the society. After waste concrete are crushed, removed impurities, classification, they can be used as recycled aggregates. The technology of using recycled aggregates to confect recycled concrete not only may resolve the environment pollution produced by the waste concrete, but also may save crude aggregates resource, and bring the prominent social benefit, economic benefit and environmental benefit It is a sustainable development road that can save resources and energy, alleviate the earth environment load and support the ecosystem balance.This paper summarizes that recycled concrete brings the influence to the environment and its domestic and international research status and development, and puts forward developing the recycled concrete technology is the need of social sustainable development The paper designs a set of technics flow of producing recycled aggregates and uses scrap concrete in Shicheng road of Tangling to manufacture some recycled aggregates, and researches the basic properties of recycled aggregates such as apparent density, absorption, crush index, compacted density, porosity, etc. and analyses the properties change of recycled aggregates after the respective surface treatment with the polymer and polysilicone waterproofing agents, and then obtains the result that their absorption decreases and their properties improves after recycled aggregates are surface treatedWith theory method the engineering value of lime-fly ash stabilized aggregate base made by recycled aggregates is studied Maximum dry density, optimal water-containing quantity, unconfined compression strength, split tensile strength and resilient modulus are determined experimentally. The result shows that lime-fly ash stabilized aggregate base is feasible and it can satisfies the demand of road engineering.The paper researches less on the structures and the properties of the structures of recycled concrete, and it deserves further research. At the same time in order to extend the application of recycled concrete, some standards and criterions must be established for the construction of recycled concrete. It need the support of the governmental industry policy and the guarantee of national law and statute. The government must establish compulsory special statute for the treatment of building waste, to promote the quick development of recycled concrete, a sort of new-style green concrete, at our country.