Abstract
Generally, various kinds of cracks are the main type of distresses during the service period of asphalt pavements. To save maintenance costs and improve the crack resistance of asphalt pavements effectively, this paper presents a unique design method for the material composition of small particle-size (SPS) asphalt mixture for controlling cracks in asphalt pavement. First, Stone Mastic Asphalt (SMA)-II was designed as a basic gradation according to the A.N. Talbot curve and SMA-II-1, SMA-II-2 and SMA-II-3 were designed according to the Superpave mix design method, the Bailey method and the Particle interference theory, respectively. Second, based on Marshall test results, the optimal fiber content and optimal asphalt content of three gradations were determined. Then, the influence of the passing rate of 1.18-mm sieve and 0.075-mm sieve on the air voids of SMA-II and the influence of the filler-asphalt ratio on the performance of SMA-II were investigated, and an appropriate range of filler-asphalt ratio was obtained. Finally, a high-temperature performance test, a water stability test, and a skid resistance test demonstrate that the overall performance of SMA-II can satisfy the specifications. A low-temperature bend test and analysis of bending strain energy density show that SMA-II with a crumb rubber modifier and a polymer fiber has better crack resistance performance than SMA-I (SBS-modified mixture). Life-cycle cost analysis shows the economic advantage of SPS asphalt thin overlays over traditional AC-13 thin overlays.
Highlights
Asphalt pavement is exposed directly to the environment and continuous temperature cycling, and the sharp drop in temperature can cause huge shrinkage stress
All maximum tensile strains in this test are more than 10,000, which is much of fact, when the filler-asphalt ratio is small, because of the existence of too much free asphalt, larger than the 2800 that is required by Chinese specification JTG F40-2004 [39]
First, workinterfacial of external force on uniformly and disperse in asphalt, which will result in the change of thethe asphalt’s property; the viscosity of the asphalt-rubber binderthen, increases and the temperature sensitivity the material will be converted into elastic strain energy, elastic strain energy turns into surface will improve the low temperature performance of the asphalt mixture
Summary
Composition of Small Particle-Size Asphalt Mixture for Controlling Cracks in Asphalt Pavement. Jiyu Xin 1,2 , Jianzhong Pei 1, *, Mitsuyoshi Akiyama 2, * , Rui Li 1 , Jiupeng Zhang 1 and. Featured Application: Authors are encouraged to provide a concise description of the specific application or a potential application of the work.
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