Structure Design And Study On The Performance Of Eco-permeable Asphalt Pavement

At present, the pavement design of many urban roads, public squares in our country are made with the type of dense graded impermeable concrete and stone plates pavement structure, which contrary to the concept of "natural coordinated development, ecological benign circle", such a large area of this pavement use will have a negative impact on the ecological environment of city. Eco-permeable pavement structure characteristics are different from ordinary road, which can regulate atmospheric humidity, with good environmental and ecological benefits. Therefore, the eco-permeable asphalt pavement materials and its structure in combination are studied in this paper, the main contents include the following sections:(1)Permeable pavement conditions on China’s application is conducted a comprehensive investigation, the proportion of composition and performance indicators related entities permeable pavement engineering is identified, referenced existing specifications for raw materials, putted forward the new requirements of the more scientific and reasonable raw material specifications, provided the reference for the permeable pavement material composition design.(2)Proposed the grading standards of permeable pavement design based on rainfall intensity, required porosity of permeable pavement and road design elements in different rainfall conditions is studied, and permeable asphalt mix design is researched.(3)The relevant specifications of permeable pavement systems is investigated, proposed road performance evaluation recommended value of permeable pavement, the influence of different gradation porosity in permeable asphalt pavement is studied, established the foundation for the practical application of the permeable pavement.(4) In view of the current commonly used permeable asphalt pavement structure,established mechanical models of permeable asphalt pavement structure, made permeable asphalt pavement structure optimization based on load stress comprehensive response, lay the foundation for permeable asphalt pavement structure design.(5)Through the implementation of eco-permeable asphalt pavement engineering entity,established the construction quality inspection system of permeable asphalt pavement,including deflection, skid resistance, water permeability and the flatness, provided technical reference for permeable pavement application in Tianjin and nationwide.