High permeability quickly drains surface water,improving pedestrian and vehicular safety.Pores absorb sound,creating quieter environments.Water evaporation from pores cools surface temperatures.Promotes groundwater recharge and reduces stormwater runoff burden on drainage systems.Can be colored for aesthetic enhancement.
Key technical parameters include effective porosity(typically 15%-25%),permeability coefficient(≥1mm/s),and strength.Balancing strength(especially flexural)with porosity is challenging and requires optimized mix design and/or reinforcement admixtures.Structure typically comprises a surface layer(colored pervious)and a base layer(plain pervious or open-graded aggregate).
Primarily for"Sponge City"permeable pavements:sidewalks,cycle paths,plazas,parking lots,community roads.Landscaping features:tree pits,slope protection.Lightly trafficked roadways like municipal service lanes.Not suitable for heavy-duty highways due to strength limitations.Requires application of a specialized sealant/hardener after placement for protection and strength.
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