The Experimental Study Of Asphalt Mixture Fatigue Property Under Different Impact Factor

When the pavement is on its period,the stress or strain is long-term in the fold-change state under the repetitive action of the wheel,leading the strength of pavement strcture fall gradually.While the repetitive action of the loads exceed definite degree,the stress of the pavement will exceed the strength of pavement structure,leading the pavement appearant fatigue crack.Through indoor test to find out asphalt mixture fatigue law is the purpose of studying asphalt mixture fatigue property,analyses the influencing factor of fatigue property,and combine the indoor test outcome and actual ground-furface useabily to forecast the fatigue life of asphalt pavement for supervising the physical design and stuff compose design of asphalt pavement.In this text,we adopt conventional phenomenology farad to reaearch the fatigue property of composite through experiment.First,attach AC-13I,SMA-13,2# three strain gradation style, and do the mix design througn marshall test to gei the best asphalt content under different gradation condition,and then,demonstrate the rationality through high temperature stability and water stability.After this,do the four-point bending test to get curve pull intensity,and do the fatigue property experiment research by considering different stress condition,loading frequency,asphalt variety,composite gradation,specimen pitch,hot-aging condition,fibre content,etc,and get the fatigue equation under different test conditions through regression. Through analysing the experiment data,we can get round robin conclusion,and this can supply theory support and suggest for henceforth development work.