Effect of clogging and cleaning on the permeability of pervious block pavements. Issue 9 (29th July 2022)

• Record Type: Journal Article
• Authors: Lee, Jin-Wook; Yang, Eomzi; Jang, Jaewon; Yun, Tae Sup
• Is Part Of: International journal of pavement engineering. Volume 23:Issue 9(2022)
• Page Start: 3147
• Page End: 3156
• Publication Date: 2022-07-29
• Subjects: Pervious block pavement -- stormwater runoff -- infiltration rate -- permeability -- clogging -- X-ray CT image; Pavements -- Design and construction -- Periodicals; Highway engineering -- Periodicals; 625.805
• DOI: 10.1080/10298436.2021.1884861
• Languages: English
• ISSNs: 1029-8436

Abstract

ABSTRACT: Metropolitan regions where ground surfaces are covered by an impermeable layer are vulnerable to heavy rainfall. Pervious pavement that facilitates infiltration of stormwater runoff into underground reservoirs mitigates the risk of flooding. However, pervious pavement systems are prone to clogging, which reduces its permeability. Three types of pervious block pavers were field tested in order to investigate their clogging characteristics, consequent permeability reduction, and response to cleaning. The permeability of fresh specimens ranged from 0.71 to 0.92 mm/s. After six months in the field, the permeability decreased to 17% of the initial permeability, and was restored to ∼30% of initial value after cleaning. The X-ray computed tomography images of used specimens provided the clogging characteristics such as clogging depth, clog fraction, and cleaning efficiency. The lattice Boltzmann model simulation results corroborated the experimental observations. The results of this study can be used to design concrete and aggregate mix, determine the cleaning period, and plan an appropriate maintenance procedure.