Experimental Study On Modification Of Green Rubber Powder Cement Concrete And Lightweight Aggregate On Mechanical Properties

In this paper, to solve the waste tire rubber powder and fusion capability cementitious material difference, sand mixed with cement glue, lightweight aggregate concrete specimen will cause reduced strength and other issues, the choice of Span 40, sodium dodecyl benzene sulfonate, sodium dichloroisocyanurate for waste tire rubber powder surface modification. Through the study of modified and non-modified rubber powder cement mortar and lightweight aggregate concrete, formulated rubber powder and rubber powder cement mortar lightweight aggregate concrete LC40, for different number and a different dosage rubber powder early mechanical testing.By cement glue sand mixed with three kinds of drugs modified and unmodified 2%,6% and 10% of 20 mesh,60 mesh,80 mesh,100 mesh,120 mesh rubber powder test, its 3d,7d,14d,21d,28d compressive strength comparison; and the effects of different content and different number of mechanical properties of cement glue sand. In the lightweight aggregate concrete mixed with three kinds of Chinese and foreign pharmaceutical modified and unmodified 2%,6% and 10% of 20 mesh,60 mesh, 80 mesh,100 mesh,120 mesh rubber powder test, its 3d,7d,14d,21d,28d compressive strength of contrast; modified and unmodified by waste tire rubber powder on the mechanical properties of lightweight aggregate concrete test, based on a combination of macro and micro research studies, the use of compressive strength test macro performance test, combined BT-1800 motion picture particle testing, analysis and microscopic analysis of the microstructure of the test mechanism and test ESEM activity index measured by using nuclear magnetic resonance analysis of the distribution of the pore structure. The results showed that:40, sodium dodecyl benzene sulfonate, sodium dichloroisocyanurate modification of rubber powder, rubber powder improves the activity index of circularity by Span and reduce porosity and improve rubber compressive strength of lightweight aggregate concrete; with the modified rubber mesh increases compressive strength:120 mesh<100 mesh<80 mesh> 60 mesh> 20 mesh,80 mesh optimum compressive strength.