Study On Temperature Effect Of Porous Cement Concrete Pavement

With the rapid development of transportation business, the convenient traffic facilities brings people great convenient, while brings a lot of damage to people's living environment and ecological balance system. Porous concrete as a new environment-friendly ecological concrete has attracted more and more attention. Through the relevant research data shows that, the porous concrete pavement materials can satisfied the loading capacity of a certain, meanwhile, because of its unique skeleton-pore structure, it has favorable peculiarly Way-use service performance,such as Waterproof,breathable and noise reduction and so on. The porous cement concrete as road surface material, not only can improve the efficiency of road drainage and traffic safety, but also protect the environment and alleviate the urban heat island effect. Therefore, there is an important engineering and environmental significance to give a thorough research on the eco-friendly porous concrete pavement.This paper, focusing on porous cement concrete pavement temperature effect analysis launched research. In the thesis, firstly, describes the advantages of the porous cement concrete pavement and present domestic and international research condition; then, prepared the single size porous cement concrete specimens by filling parcel theory and analyze the characteristics of pore structure, test the compressive and flexural performance. Through simulating the solar radiation function and natural ventilation condition, study the temperature response characteristics of the porous cement concrete. Proposed four-story porous cement concrete pavement architecture, according to the thermal stress calculation theory of the cement concrete, through the establishment of the finite element thermal-structural coupled three-dimensional model to study its thermal stress analysis of Porous cement concrete and Portland cement concrete surface thickness, base modulus, temperature gradientplate length and width of the temperature stress rules, and through the porous cement concrete pavement thermal stress research, analysis to determine a reasonable distance between the joints.