Experimental Study On The Mechanics Property Of The Polypropylene Fiber Recycled Concrete

Recycled concrete technology can make the large amount discard concrete pieces, which were produced in house construction and municipal engineering, go to circulation utilize, this kind of building garbage disposal way which turns the waste into the wealth , has already released the contradiction between supplies and demands of aggregates, also lighten the destruction to the environment which caused by the discarded concrete, it can economize the energy and resource, protect the human living environment, so it has taken the important subject for research of the sustainable development path, and concerned by domestic and international project circle & academia ,extremely.The strength of the recycled concrete is lower than that of natural aggregate concrete, because of the adverse effects of the defects in the recycled aggregate. The strength and the durable performance of the the polypropylene fiber recycled concrete are advanced and improved notably, because of the reinforcement and modified function of the polypropylene in the recycled concrete body, based on this , the polypropylene fiber recycled concrete can satisfy the requires of the use standard of the highroad concrete pavement , then ,the recycled concrete technology has gotten the real application in rebuilding and improvement project of the highroad concrete pavement , and then, all of this has widen the applied range of the recycled concrete ,effectively.According to relevant test methods and standards, this dissertation has carried on experimental study on the basic mechanics performance of the polypropylene fiber recycled concrete, including:1. The study on the reinforcing effects of the polypropylene fiber recycled concrete, which is based on the strengthening mechanism of the polypropylene fiber concrete;2. The study on the influencing factors of the compressive strength and split-tension strength of the polypropylene fiber recycled concrete, such as: the mixing amounts of the polypropylene fiber and the fine silica flour, the kinds of the polypropylene fiber, the types of the original aggregate, the strength grades of the concrete, the agitated methods of the polypropylene fiber and the varieties of the water reducing agent ,etc;3. The study on the age strength of the polypropylene fiber recycled concrete; 4. The study on the apparent density and the hygroscopic coefficient of the polypropylene fiber recycled concrete.5. The study on the project application and the economical efficiency of the polypropylene fiber recycled concrete.