The Composite Temperature Stability Study On Perfusion Rubber Powder Semi-flexible Pavement

Semi-flexible pavement is a new type of composite pavement materials, traditionalrigid concrete pavement and flexible combination of asphalt concrete pavement.In thispaper, pouring rubber temperature stability performance of semi-flexible pavementcomposite, is to study crumb rubber elastic solids after mixed with semi-flexible pavement,pavement temperature stability as a result of changes in performance.This paper, by volume method to determine mineral aggregate gradation ofsemi-flexible pavement, ensure the achieving of25weighting percentage of void.Fort andTower of flying tests and to thank waste asphalt on the work to determine the best asphalt,asphalt volume3.3.Volume method, such as preparation of cement mortar mixed with15under the rubber powder and silane coupling agent kh560to increase the interface oforganic and inorganic bonded, ensure that the mechanical properties of cement mortarfluidity and meet the requirements.Perfusion semi-flexible pavement composite materialof rubber powder used in high-temperature temperature of standard Marshall test and tracktest to verify, test results show that the bored rubber semi-flexible pavement dynamicstability of composite materials in more than15,000/mm, far exceeds the norms for heavytraffic requirements of flexible pavement showed excellent high temperature stability.Lowtemperature crack resistance of composite materials using freeze-thaw split test to verifyand introduces the concept of stress intensity factors of review materials, test results showthat the rubber is conducive to improving the low-temperature anti-cracking performanceof semi-flexible pavement itself, be partially eliminate the effect of temperature stress andsemi-flexible pavement cracking at low temperature to a certain degree ofinhibition;Rubber powder under low temperature conditions, reduces the stress intensityfactor of material, increase resistance to relaxation properties, under the same conditionson the occurrence of the crack in the material and carry out, relaxation of the materialplays a certain restraint.Pavement performance of semi-flexible pavement has a good, will enrich our countryroad traffic system of structures and materials, in order to meet the transport needs of thegrowing contribution.This be Office of Guangxi Zhuang Autonomous Region transportthe asphalt mixture’s road performance of semi-rigid base composite material and modelstudy on support for science and technology projects.