Research on the Road Performance of RCA High Modulus Basalt Fiber AC-20C Asphalt Mixture
In order to restrain the emergence of asphalt pavement disease and extend its service life,we mixed basalt fiber and RCA high modulus agent into AC-20C asphalt mixture,and carried out research on road performance such as high temperature rutting resistance,low temperature cracking resistance and water damage resistance.The recommended dosage of RCA high modulus agent was evaluated by three index tests on 70 Grade A asphalt with different RCA high modulus agent content.Based on the design of the mix ratio of basalt fiber AC-20C asphalt mixture with different RCA high modulus agent content and the related pavement performance,we determined the best oil-stone ratio and the reasonable dosage of RCA high modulus agent.The test results show that the modified asphalt with high modulus can meet the technical requirements of conventional SBS I-D polymer modified asphalt when the content of high modulus agent is 10%～16%.The addition of 0.4%basalt fiber can significantly improve the pavement performance of asphalt mixture.From the aspect of high temperature performance,the recommended content of RCA high modulus agent is 16%,and from the aspect of low temperature performance and water stability,the recommended content of RCA high modulus agent is 14%.
high modulus agentbasalt fiberaggregate gradationoil-stone ratiopavement performance
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