Research On Function Of Cellulose Fiber In SMA Mixture

Along with national economic development, traffic increases rapidly. Moreover, the phenomenon of overload and heavy burden is very common, and then it is more and more difficult to traditional asphalt pavement to support this heavy traffic. So how to improve asphalt pavement technology continuously has been one of the most important topics present. Nowadays, SMA (Stone Mastic Asphalt) is one of the most popular super asphalt pavements, which is used widely owing to its favorite pavement performance. In addition, as an absolutely necessary component in SMA mixture, cellulose fiber attracts attention gradually.Taking domestic Dongda Fulong Cellulose Fiber as subject investigated, the subject has studied the pavement performance of Dongda Fulong Cellulose Fiber in SMA mixture through SMA asphalt Mixture indoor tests, and determined function of Dongda Fulong Cellulose Fiber in SMA mixture by contrast with German JRS Cellulose Fiber which is widely used in the world.By means of Marshall Tests and Track Tests, cellulose fiber has been found that it can improve the stability and anti-elevated temperature ability of mixture to SMA, such a densely discontinuous graded road structure. There is an affinity between strengthen function of cellulose fiber to SMA mixture and the content, the function is notable gradually when the content of Dongda Fulong Cellulose Fiber is from 0.1% to 0.5%, and the optimum content is 0.5%.Based on experimental results and analysis, the subject has obtained that Dongda Fulong Cellulose Fiber get asphalt oil film thicker from adsorbing clean oil to increase adhesiveness between asphalt and ore, enhance and reinforce binding power between aggregates, and improve stability and durability of mixture. According to Marshall Modulus and change regularity of moving stability, the function of domestic Dongda...