Tom_Tian
春芽
共回答了12个问题采纳率:91.7% 举报
At - 40 DEG to10 DEG C temperature range,the lower the temperature,asphalt concrete and the incorporation of polyester fiber asphalt concrete and its failure bending strain decreases,i.e.,the lower the temperature,asphalt concrete and the polyester fiber asphalt concrete anti deformation capacity are getting worse.But under the same conditions,polyester fiber,the asphalt concrete anti deformation ability.In the experimental temperature range,adding 0.2% polyester fiber asphalt concrete damage bending strain at different temperatures can be improved an average of 53.6%,with 0.35% of polyester fiber asphalt concrete damage bending strain at different temperatures can be improved an average of 79.8%,with 0.5% of polyester fiber asphalt concrete damage bending strain at different temperatures to an average increase of 132%.This shows that polyester fiber asphalt concrete in low temperature and can effectively prevent the damage of crack formation and development,when there are cracks,bridge in interstitial fiber as a reinforcing rib to the role,in the same under the action of stress,because the fibers from the matrix gradually pulled out can be delayed crack formation and expansion,increase specimen damage when the width,so that the asphalt concrete specimen exhibited greater deformation capacity and ductility.Therefore,the higher the content of fiber,achieve the ultimate strength of the specimen by the failure strain is greater.
1年前
9