Study on Influence of Coarse Aggregate Particle Size and Aggregate-Binder Ratio on Wear Resistance of Pervious Concrete
The influence of coarse aggregate particle size and aggregate-binder ratio on the wear resistance of pervious concrete is examined through tests of physical properties,mechanical properties,and wear resistance.The relationship between the density,porosity,tensile and compressive strength,and wear rate of pervious concrete is analyzed.It is found that increases in coarse aggregate particle size and aggregate-binder ratio result in a decrease in density,an increase in porosity,and a reduction in strength.Pervious concrete with a coarse aggregate particle size of 10-15 mm exhibits poorer mechanical properties,with 28-day compressive strength being only 67.2%of that with a 5-10 mm aggregate size.The larger the aggregate-binder ratio and coarse aggregate size,the higher the wear rate.The wear resistance index,based on compressive strength,can accurately predict the wear resistance of pervious concrete.Both coarse aggregate size and aggregate-binder ratio significantly impact the performance of pervious concrete,with the aggregate-binder ratio contributing more,at 70.71%-85.17%.Therefore,in the design and construction of pervious concrete,reasonable selection of coarse aggregate particle size and aggregate-binder ratio is essential to meet the performance requirements in practical engineering applications.
pervious concretecoarse aggregate sizeaggregate-binder ratiowear resistance index
万方数据
维普
