Experimental Investigation On Meterial Propeties Of Recycled Aggregate Concrete

With the development of the construction industry, the wastes of construction have been growing day by day, and most of them are waste concrete. Besides the charge for the jillion wastes disposal is very high, it also cause a lot of environmental problems. The Recycled Aggregate Concrete (RAC) base on environment protection and sustaining development can settle the problem. This paper processes comprehensive researches and analyses on material properties which conclude the work-abilities, the deformabilities, the physical and mechanical properties as well as the viabilities through a series of in doortest.On work-abilities, the paper puts the important on the placeabilities and coagulationabilities of RAC. On the physical and mechanical properties, the paper puts the important on the compressive strength, tensile strength and flexural strength; Analyses the influences of water-cement ratio, aggregate pretreatment methods, curing age to the strength of the RAC, and analyses the relation of these mechanics indicators. On the deformabilities, the paper puts on the design formula of elastic modulus of the RAC mostly through the test dates, and retrace out the peak value strain formula through the uniaxial stress-strain curve of the RAC, and researches the drying shrinkage deformabilities of the RAC. On the viabilities, the paper puts on the differences on impermeabilities, reistance tochlorion penetrabilities, resistance to freezing and thawing, as well as wearabilities between normal aggregate concrete and the RAC, and analyses the factors.At last, the paper analyses the micromechanism of RAC, thereby bitterly know the material properties of the RAC.