Abstract
In order to use cement stabilized macadam in sponge road engineering, porous cement stabilized macadam was designed based on Bailey method and Taibal method, and theoretical porosity was taken as design index. Effective porosity, permeability coefficient, unconfined compressive strength, splitting strength and COD removal ability were analyzed by experiment. The results show that, effective porosity is proportional to theoretical porosity, ratio of effective porosity is lower while theoretical porosity is smaller. Unconfined compressive strength(UCS) and splitting strength are decreasing with theoretical porosity increasing, and downtrend is more significant while theoretical porosity is less than 20%. The removal ability of COD is enhancing with porosity increasing. So, if strength, water permeable ability, water storage ability, COD removal ability are taken into consideration, 20% is optimum porosity for porous cement stabilized macadam.
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