Study On The Influence Of Rock Asphalt Upon The Performance Of Asphalt Mixture

With the rock asphalt been discovered and mined around the word, rock asphalt as an excellent natural modifiers are increasingly applied to the current road construction, but on the pavement performance of rock asphalt modified asphalt mixture and rock asphalt and SBS composite modified asphalt mixture have not done a systematic and comprehensive study, especially, rock asphalt as a modifier has not a unified and appropriate dosage standard, construction technology of rock asphalt modified mixture and rock asphalt and SBS composite modified mixture require further investigation.By laboratory experiments in this paper, compared the high temperature stability, water stability, low temperature anti—cracking of the asphalt mixture, Buton rock asphalt for the asphalt mixture quality ash 3%, 4.5%, 6% of the rock asphalt modified asphalt mixture, content of 4% of SBS modified asphalt mixture, Buton rock asphalt for the asphalt mixture quality ash 3% and content of 4% of SBS composite modified asphalt mixture,and compared the fatigue properties of the asphalt mixture, Buton rock asphalt for the asphalt mixture quality ash 3%of the rock asphalt modified asphalt mixture, content of 4% of SBS modified asphalt mixture, Buton rock asphalt for the asphalt mixture quality ash 3% and content of 4% of SBS composite modified asphalt mixture, the test results showed that, the pavement performances of high temperature stability,water stability, low temperature anti—cracking of rock asphalt modified asphalt mixture increase obviously with the increase of Buton Rock Asphalt mixing content, rock asphalt and SBS composite modified asphalt mixture can be combined play two kinds of modifier to their own advantages so that the pavement performance is the best. in the SMA-10, the best dosage Buton asphalt are the quality of asphalt mixture of 3%, both in the rock asphalt modified asphalt mixture and rock combined with SBS composite modified asphalt mixture, the comprehensive pavement performance of modified asphalt mixture and composite modified asphalt mixture are the best at the moment.Combine practical application of engineering needs, studied the construction technology of Buton rock asphalt modified asphalt mixture and Buton rock asphalt and SBS composite modified asphalt mixture indoor, the study found that in the mixing process of Buton rock asphalt modified asphalt mixture and Buton rock asphalt and SBS composite modified asphalt mixture, compared premixed aggregate and asphalt or SBS modified asphalt and then join the rock asphalt to produce mixture, premixed aggregate and the rock asphalt and then join asphalt or SBS modified asphalt to produced mixture, the high temperature stability, water stability, low temperature anti—cracking can improve 10%. In the paving process of the rock asphalt modified asphalt mixture and rock combined with SBS composite modified asphalt mixture, must be strictly enforced the control targets of compactness.According to market price, analysis the relationship between the cost of using rock asphalt modifier and the function of Buton rock asphalt modified, and Buton rock asphalt and SBS composite modified asphalt mixture, rock asphalt modifier have significant cost advantages, significant economic benefits, and is worth promoting.