Research on the Road Performance of Different Types of Basalt Fiber Thin Layer Covering Asphalt Mixtures
[Purposes]There are shortcomings in the performance of conventional thin layer overlay as-phalt mixture.Basalt fibers are added to the asphalt mixture to improve its road performance and extend its service life.[Methods]On the basis of basalt fiber content of 0%,0.2%,0.4%,0.6%,and 0.8%,mix design and related road performance research were carried out on AC-10C and SMA-10 thin layer over-lay asphalt mixtures.[Findings]When the fiber content is 0.4%,the AC-10C and SMA-10 mixtures have the best high and low temperature performance.The dynamic stability test results are 4 769 and 5 498 times/mm,respectively.The penetration strength test results are 0.92 and 1.17 MPa,and the bend-ing failure strain test results are 3 418 and 3 578µε,respectively;when the fiber content is 0.6%,AC-10C and SMA-10 mixtures have the best water stability performance,with residual stability test results of 91.8%and 94.6%,and residual strength ratio test results of 89.2%and 89.4%,respectively.[Conclu-sions]From the perspective of high and low temperature performance,the recommended content of ba-salt fiber is 0.4%;from the perspective of water stability performance,the recommended content of basalt fiber is 0.6%.
basalt fibermineral aggregate gradingoil stone ratioasphalt mixtureroad performance
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