Department of Civil and Environmental Engineering, Imperial College London, SW7 2BU, UK.
Department of Civil and Environmental Engineering, Imperial College London, SW7 2BU, UK.
J Environ Manage. 2017 May 15;193:221-233. doi: 10.1016/j.jenvman.2017.02.018. Epub 2017 Feb 20.
Permeable concrete (or "pervious concrete" in North America) is used to reduce local flooding in urban areas and is an important sustainable urban drainage system. However, permeable concrete exhibits reduction in permeability due to clogging by particulates, which severely limits service life. This paper reviews the clogging mechanism and current mitigating strategies in order to inform future research needs. The pore structure of permeable concrete and characteristics of flowing particulates influence clogging, which occurs when particles build-up and block connected porosity. Permeable concrete requires regular maintenance by vacuum sweeping and pressure washing, but the effectiveness and viability of these methods is questionable. The potential for clogging is related to the tortuosity of the connected porosity, with greater tortuosity resulting in increased potential for clogging. Research is required to develop permeable concrete that can be poured on-site, which produces a pore structure with significantly reduced tortuosity.
透水混凝土（或在北美称为“渗水混凝土”）用于减少城市地区的局部洪水，是一种重要的可持续城市排水系统。然而，由于颗粒物堵塞，透水混凝土的渗透性会降低，这严重限制了其使用寿命。本文综述了堵塞机制和当前的缓解策略，以便为未来的研究需求提供信息。透水混凝土的孔隙结构和流动颗粒物的特性会影响堵塞，当颗粒物堆积并堵塞连通孔隙时就会发生堵塞。透水混凝土需要定期通过真空清扫和压力清洗进行维护，但这些方法的有效性和可行性值得怀疑。堵塞的可能性与连通孔隙的曲折度有关，曲折度越大，堵塞的可能性越大。需要研究开发能够现场浇注的透水混凝土，这种混凝土能够形成具有显著降低曲折度的孔隙结构。
