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Retention of asphalt pavement with OGFC, large pores permeable asphalt pavement structure such as the parent structure, through the pores of the parent structure perfusion retention material to achieve its functional requirements . Rain or artificial watering in the case of the road surface can absorb moisture retention and water retention of water stored in the pores of the material ; in the case of solar radiation , evaporation , the use of heat to reduce the absorption of moisture evaporation temperature of the road surface , has a good ecological benefits. In today's increasingly strong awareness of environmental protection , water retention of the road because of its environmental and safety features will be widely used . This topic focuses on the retention of road pavement structure , water retention material selection , water retention material composition , water retention properties of raw materials , water retention materials, working mechanism , the cooling effect of water retention pavement , pavement construction process as well as the economic benefits of water retention analysis, recommended the retention of materials and raw material composition traits . On this basis , the water retention in the indoor simulated asphalt under actual working conditions in the light of the thermal environment , by comparing the retention asphalt and dense graded asphalt mixes studied retention asphalt cooling effect . Scanning electron microscopy of materials for water retention observed hydration products , research materials, water retention mechanism . Finally, water retention pavement construction process are discussed , analyzed the economic and social benefits of road water retention . In addition, retention of the asphalt pavement performance analysis and validation , including high performance , water stability , low temperature performance and strength properties , the findings indicate that retention has a good asphalt road performance .
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