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为探究不同因素对再生骨料结构层渗蓄性能的影响,模拟降雨并改变结构层骨料粒级、级配、体积掺量及填料顺序,分析表征渗蓄性能的相关指标。研究表明:随着再生骨料粒径减小,透水性能下降,蓄水能力明显提升,再生粗骨料透水增强阶段出水量是再生砂的3.3~3.8倍,而体积存水率仅分别为再生砂的1/5;分层填料方式下,级配对材料渗蓄性能产生影响的主要因素是再生砂层的体积占比,体积占比从20%提高为60%,透水增强阶段出水量降低20.5%,蓄存雨水的颗粒间空隙体积占比提升3.4%;随再生骨料体积掺量增加,材料的透水性能下降,滞蓄性能明显提升,纯再生骨料的1 h体积蓄水率为纯天然骨料的3.2倍;仅改变填料顺序时,底层铺砂可将材料初始透水时间延迟4~5 min,体积蓄水率提高3.1%,但随着再生砖层体积占比提高,滞蓄能力由砂层材料体积占比主导。
Abstract:To explore how various factors affect the infiltration and storage performance of recycled aggregate structural layers, this study simulated rainfall intensity and adjusted aggregate particle size, gradation, volume content, and filling order,analyzing relevant performance indicators. Studies indicate that smaller recycled aggregate particles reduce water permeability but enhance water storage: recycled coarse aggregates yield 3. 3-3. 8 times more water than recycled sand in the enhanced permeability stage, with only 1/5 the volume storage rate. For layered filling, the recycled sand layer's volume proportion is key. A rise from 20% to 60% cuts such water output by 20. 5% while increasing rainwaterstoring pore volume by 3. 4%. Higher recycled aggregate content reduces permeability but boosts detention; pure recycled aggregates show 3. 2 times the 1-hour volume storage of natural ones. Altering filling order to sand at the bottom delays initial permeability by 4-5 minutes and raises storage by 3. 1%, though recycled brick proportion growth shifts dominance to sand layer volume.
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基本信息:
DOI:10.19740/j.2096-9872.2025.04.07
中图分类号:TU528.041
引用信息:
[1]李珍宁,李嘉鹏,李飞.再生骨料结构层渗蓄性能的影响因素分析[J].北京建筑大学学报,2025,41(04):54-61.DOI:10.19740/j.2096-9872.2025.04.07.
基金信息:
国家重点研发项目(2022YFC3803404)