再生骨料透水混凝土配合比试验研究

Experimental Study on Mix Proportion of Recycled Aggregate Pervious Concrete

为研究再生骨料对透水混凝土的渗透系数和力学性能的影响,通过研究再生骨料和天然骨料对透水混凝土性能的影响规律。试验表明再生骨料和天然骨料透水混凝土性能规律不同,水灰比在0.25~0.30时,再生骨料透水混凝土抗压强度随水灰比增大而增大,设计孔隙率18%时抗压强度最高;天然骨料透水混凝土抗压强度随水灰比增大而减小,随设计孔隙率增大而减小。不同骨料的透水混凝土渗透系数随水灰比增大而减小,随孔隙增大而增大。

For the research of recycled aggregate of permeable concrete permeability coefficient and the influence of physical properties,through the research of recycled aggregate and natural aggregate on the properties of pervious concrete are studied.Trials show that performance of recycled aggregate and natural aggregate permeable concrete rules have difference,water cement ratio during 0.25~0.30,permeable concrete compressive strength of recycled aggregates increases along with the water cement ratio,while designed porosity 18%when the highest compressive strength.The compressive strength of natural aggregate pervious concrete decreases with the increase of water-cement ratio,and decreases with the increase of designed porosity.The permeability coefficient of pervious concrete with different aggregates decreases with the increase of water-cement ratio and increases with the increase of porosity.