Study On Microscopic Mechanism Of Fly Ash Hot Recycled Asphalt Mortar And Performance Of Mixture

Based on the national green development strategy,according to the characteristics of the Inner Mongolia Autonomous Region’s geographical resources,the technology of asphalt mixture recycling and fly ash recycling technology were used in highway construction,realize the intensive use of resources,reduce emissions,improve environmental benefits of highway maintenance construction.The fly ash particle size,specific surface area,pore structure,chemical composition and surface geometric characteristics were tested by microscopic test method,and compared the main physical and chemical properties with mineral powder,confirm the adaptability of fly ash as filler in asphalt mixture.The infiltration and adsorption of fly ash and asphalt interface was analyzed by micro test methods,the chemical reaction mechanism study of fly ash and asphalt,on the basis of study on the fly ash surface modification mechanism of chemical bond theory based on fly ash asphalt mortar preparation and lay the foundation for improving the performance.Choose different types of fly ash and preparation of recycled asphalt asphalt mortar,a comprehensive test of high temperature performance,low temperature performance,the system analysis of fly ash type,type of recycled asphalt on asphalt mortar,the fly ash recycled asphalt mortar method to improve the performance,determine the best performance of asphalt mortar recycling of fly ash.The hot mix plant with coal ash recycled asphalt mixture mix design,system test of fly ash reclamation and high temperature performance test and low temperature performance test,water stability test and fatigue test of asphalt mixture,the comprehensive evaluation of fly ash recycled asphalt mixture pavement performance.Choose a the Inner Mongolia Autonomous Region highway expansion project is paved with fly ash hot mix plant recycling test material of asphalt mixture of fly ash,hot mix plant recycling mixture engineering application,and the application effect of the test section for tracking and monitoring,verification of fly ash hot mix plant recycling application effect of asphalt mixture.Asphalt mixture regeneration technology and recycling technology of fly ash combined not only conforms to the development of the Inner Mongolia Autonomous Region geographical advantages in resources,but also the new ways to promote sustainable and healthy development of the highway construction,is of great significance for the realization of the strategic goals to promote green transportation.