Study on the Effect of Different Forms of Polyethylene Terephthalate(PET)Plastics on the Performance of Asphalt Mixes
Taking polyethylene terephthalate(PET)as the research object,through the tests of high and low temperature performance,water stability and anti-fatigue performance,the effects of PET in powder and granular forms and its addition in different contents and ways on the performance of as-phalt mixture were investigated.The results show that wet method is not suitable for the modification of asphalt mixture by PET plastic,and it is suggested that PET be mixed into asphalt mixture by dry method,and the recommended dosage range is 3％～6％.Granular and powdered PET can obviously improve the high and low temperature performance of asphalt mixture with similar improvement range,but both of them will deteriorate the water stability of asphalt mixture.Controlling the content within 6％can meet the technical requirements of water stability in the specification.Under the same content,the fatigue resistance of granular PET to asphalt mixture is better than that of powdered PET.Generally speaking,it is recommended to use PET particles for dry modification of asphalt mix-ture,and the best recommended dosage is 6％.
万方数据
维普
