Pavement performance of permeable concrete mixed with rubber particles
To study the performance of permeable concrete with rubber particles,rubber particles with diameters of 2.00,0.60,and 0.18 mm are selected and mixed with concrete.The mass ratios of rubber particles to cement are 0.05,0.10,and 0.15,respectively.The fine aggregate with particle size of 2.36 to 4.75 mm is replaced with equivalent volume by rubber particles.The effects of rubber particles on the permeability,mechanical properties,and freeze-thaw resistance of permeable concrete are investigated.Experimental results show that as the mass ratio of rubber particles to cement increases,the connected void ratio,permeability rate,and freeze-thaw resistance of the concrete specimens improves,while the compressive strength and deformation resistance decreases.As the particle size of rubber particles decreases,the connected void ratio and water permeability rate of the permeable concrete specimens decreases,while the compressive strength increases slightly,and the freeze-thaw performance remains relatively stable.When the mass ratio of 0.18 mm rubber particles to cement is 0.05,the compressive strength and deformation resistance of the permeable concrete specimens are the best.The freeze-thaw resistance of rubber particle-modified permeable concrete is significantly better than that of ordinary permeable concrete.When the mass ratio of 0.18 mm rubber particles to cement is 0.10,the freeze-thaw resistance of permeable concrete is the highest.