The Research of Road Properties of Asphalt Mixture Based on the Materials Composed of Double Mixed Admixture
|Keywords||Highway Engineering Asphalt mixture High temperature stability Low temperature crack resistance Admixtures Sensitive factor|
Admixture technology for civil engineering materials - such as concrete an effective means of modified asphalt mixture , however , the admixture technology with cement concrete is still only in its infancy . Application effect widely recognized admixtures anti-rutting agent and Road fiber , both asphalt mixture road performance played a significant improvement in effect , such as the anti- rutting agent can be very effective to improve the asphalt mixture high temperature stability , while the road with fiber to improve the low temperature performance of asphalt mixture has a more significant improvement effect . But the two admixtures used at the same time work or a blank . To solve this problem , the use of the double doped admixtures method ( mixed with anti - rutting agent and fiber ) to improve the performance of asphalt mixture , to explore two different admixtures in the common use of the high temperature of the asphalt mixture rutting resistance capacity as well as low temperature cracking resistance of the effects . The research methods used in different material composition of the mixture under conditions , both admixtures on Mixture various properties , especially on the high temperature stability and low temperature crack resistance exhibited by the effect of improving and performance improvement regularity study the method of the dual -doped technical features and technical advantages . Study found mixed with the two admixtures asphalt mixes high and low temperature performance can be significantly improved to overcome an admixture of unity to improve the performance of asphalt mixture , while taking into account the water stability and other road performance , further enhance the effect of the application of admixture , shows a good prospect . Sensitivity factor analysis to study the impact of mixed with the most sensitive factor to improve the effect of the two kinds of admixtures asphalt mixture road performance . With research grade , type of aggregate , asphalt label three sub- factor changes the dynamic stability of the three parent factor , low-temperature failure strain , TSR sensitivity of , you can get the following main conclusion : dynamic stability is the most sensitive factor for gradation type , low-temperature failure strain is the most sensitive factor for asphalt label , TSR ( freeze-thaw splitting strength ratio) is the most sensitive factor for the type of aggregate .