Study On Comprehensive Utilization Of Solid Waste In Lian-An Road

Nowadays, due to the rapid development of economics, mineral resource consumption is greatly accelerated. For the limited and non-renewable properties, mineral resources become scarce. Besides, high consumption of mineral resource also brought huge amounts of industrial solid waste emissions and waste accumulation. Meanwhile, the infrastructure construction is in full swing, which needs great amount of earth and stone. Moreover, the old road renovation also produced a lot of construction wastes. This paper introduces the research on the use of iron tailings for graded broken stone in cushion, iron slag for cement stabilized slag in base and the reuse of wasted asphalt in pavement. This research has the good practical significance.This paper uses the method of experiment to carry out the research on physical and chemical properties of iron tailings, iron slag and waste asphalt mixture. After that, testing the dynamic elastic modulus of iron graded broken stone, freeze-thaw resistance of cement stabilized old and new iron slag, pavement performance of waste asphalt mixture reuse. Then, by using finite element analysis software ABAQUS, the pavement structure mechanical response of iron tailings graded broken stone cushion, cement stabilized slag base and waste asphalt recycle pavement are analysised.The result of dynamic elastic modulus test of iron graded broken stone shows that skeleton type gradation aggregate performance is better than continuous type gradation aggregate in dynamic elastic modulus. The freezing-thawing cycle test result shows that cement stabilized new slag is better in resistance to freezing-thawing effect. Redesigning the mix proportion of waste asphalt mixture, mixing with new asphalt and aggregate, then verifying the pavement performance of mixture, the result shows that the reuse of waste asphalt mixture is meet the requirements of specifications in terms of high temperature stability, low-temperature crack resistance and freeze-thaw resistance. Those test proved feasibility of using the three materials in pavement. This paper simulats four type pavement structure of Lian-An road, expecting to verify displacement and stress state of the whole pavement structure by reuse of solid waste, whether it meet the pavement design index or not. then analysising the mechanical response of pavement surface under the effect of vehicle loads, it uses the theory of Elastic Multilayer Theory to simulate the pavement structure. The analysis focus on the pavement distribution of deformation and interface shear stress, the result shows that the value of surface deflection and value of interface shear stress is fit for the design requirement.