Effect of Rubber Powder Dosage on the Road Performance of Foam Concrete
In order to study the influence of rubber powder dosage on the performance of foam concrete road,design related indoor test to analyze the water absorption,compressive strength,dry density and strain stress value of rubber foam concrete.The results show that the increase of rubber powder dosage,drive the improvement of the water absorption rate of foam concrete.Rubber powder itself is rela-tively weak in resisting external loads.As the amount of rubber powder mixed increases,the compressive strength of rubber foam con-crete is reduced instead;Increasing the dosage of rubber powder,lead to the decrease of the dry density value of rubber foam concrete.When the amount of rubber powder remains unchanged,the air pressure was increased from 0.3 MPa to 0.5 MPa,the corresponding strain rate of the foam concrete is increased,the damage degree of foam concrete also increases,the energy absorption and deformation resistance of the foam concrete material mixed with rubber is more superior than the foam concrete not mixed with rubber.When the impact air pressure is the same,the strain value of foam concrete with different rubber dosage shows a change of increasing first and then decreasing steadily.When the amount of rubber mixed is the same,as the applied impact air pressure increases,the corresponding strain values at each time point also increase,under the same impact air pressure,the strain value of rubber mixed with foam concrete also shows the change of increasing first and then decreasing steadily.When the air pressure is the same,the increase of the rubber blending amount,as a result,the dynamic compression change of foam concrete increases first and then decreases later.
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