This paper aims to investigate effects of modified filaceous straw fiber and powdered straw fiber on performance of recycled permeable concrete based on an engineering case.The results show that the incorporation of different forms of modified straw fibers reduces the compressive strength of the recycled permeable concrete,while the flexural strength,actual porosity and water permeability coefficient are enhanced.When the content of filaceous straw fiber is 3.2 kg/m3,the water permeability coefficient of the recycled permeable concrete reaches 4.53 mm/s,in which compressive strength meets the standard requirements.However,the water permeability coefficient of the recycled permeable concrete incorporated powdered straw fiber has a slight enhancement,and the water permeability coefficient only reaches 3.05 mm/s when the content is 4.8 kg/m3.This indicates that the utilization of waste straw fiber to prepare recycled concrete with permeable properties has engineering significance.
维普
万方数据