Effects of Rubber Aggregate and Fiber Carbon on Pervious Concretes
摘要
The purpose of this paper is to investigate the effects of rubber aggregate and carbon fiber on basic properties of pervious concrete including compressive strength, porosity, and water permeability coefficient. The rubber aggregate is artificial aggregate made from the combining cement, fly ash, crushed rubber, and water with a ratio of 1:1:0.05:0.25. After 7 days of curing, the rubber aggregate is used to replace limestone by 0, 10, and 20% by volume, the carbon fiber to cement is 0.3%. The tested results show that the compressive strength of pervious concrete is enhanced 27.03% by using 10% of rubber aggregate, especially containing carbon fiber when compared to the controlled concrete. When the rubber aggregate content increases, the compressive strength tends to reduce. The porosity and compressive strength has a well correlation. The use of rubber aggregate leads to a lower water permeability coefficient. The mixture containing 10% rubber aggregate and carbon fiber shows the best properties with the highest compressive strength, the lowest porosity and water permeability coefficient. Therefore, the use rubber aggregate in the pervious concrete is suitable for road surface, sidewalk, or parking lot to avoid flooding in the rain season.