废砖骨料对再生混凝土抗压与收缩性能的影响

Influence of waste brick coarse aggregate on compressive and shrinkage of recycled concrete

以废砖粗骨料的等体积取代率为变化因素,在分析预吸水处理与裹浆处理条件下,废砖粗骨料等体积取代废弃混凝土粗骨料对再生混凝土抗压强度影响的基础上,着重探讨了废砖粗骨料体积取代率对再生混凝土收缩变形性能的影响。研究结果表明,等体积取代率为25%时,预吸水处理与裹浆处理均可最有效地降低再生混凝土的收缩变形,而对再生混凝土抗压强度却没有明显的降低作用。等体积取代率为25%时,预吸水处理下再生混凝土的抗收缩变形性能优于裹浆处理,而裹浆处理下再生混凝土抗压强度高于预吸水处理。

Taking equal volume replacement ratio of waste brick coarse aggregate as variable,the paper,based on discussing the influence of the waste brick coarse aggregate on the compressive strength ofrecycled concrete by replacing waste concrete coarse aggregate on equal volume,explores emphaticallythe impact of the volume replacement ratio of waste brick coarse aggregate to the shrinkage anddeformation of recycled concrete.The results show that the volume replacement rate is25%,watertreatment and pre wrapped treatment can most effectively reduce the shrinkage deformation of recycledconcrete,and the compressive strength of recycled concrete is not reduced obviously.When the volumereplacement ratio is25%,the shrinkage resistance of recycled concrete is better than that of wrappingtreatment,and the compressive strength of wrapped slurry processing recycled concrete is higher than thatof pre absorption treatment.