High-strength clogging resistant permeable pavement

Abstract

Permeable pavement is utilised in order to alleviate flooding in towns, cities and other urban areas, but it is prone to clogging, has relatively low strength and requires regular maintenance. We have developed a novel permeable pavement with low tortuosity pore structure that can be cast on-site that is not only resistant to clogging, but also has high permeability and strength. This high strength clogging resistant permeable pavement (CRP) was prepared by introducing straight pore channels of varying size and number into self-compacting mortar. Samples with porosity ranging from 2 to 32% were tested. In all cases, permeability and compressive strength were substantially higher than conventional permeable concrete. More significantly, CRP can be engineered with low porosity (5%), high strength (> 50 MPa) and high permeability (> 2 cm/s), but does not clog despite extensive cyclic exposure to flow containing sand and clay. A simple method to model the permeability of CRP from the pore structure is described. We report for the first time a high strength clogging resistant permeable pavement capable of retaining sufficient porosity and permeability for storm-water infiltration without requiring frequent maintenance. This innovative system will help alleviate urban flooding and contribute towards a more sustainable urbanisation.

Decarbonizing the cementitious materials cycle: A whole‐systems review of measures to decarbonize the cement supply chain in the UK and European contexts

“…This can be facilitated through thoughtful product design to provide multiple functions without significantly increasing material use, potentially avoiding the need for multiple products, and sharing centric business models (e.g., Airbnb Inc.). An example of multi‐function product design is permeable concrete (Kia, Wong, & Cheeseman, 2019), which may reduce the need for separate drainage products in infrastructure systems. More intense use from space sharing is estimated to reduce CMs cycle emissions in Europe by <∼3% by 2050 (Material Economics, 2019).…”

A research agenda on systems approaches to infrastructure

“…This balance should also account for environmental benefits that may be achieved through use of multi-functional materials and components, e.g. permeable concrete (Kia, Wong, and Cheeseman 2020). Therefore, infrastructure systems should preferably employ simple and multi-functional materials and components, which in turn must be facilitated through good materials selection and design.…”

A Study on the Design Depth of Permeable Road Pavement through Dynamic Load Experiment

“…Due to the connected pores, the strength and the life-cycle of permeable road pavements are mostly lower than those of conventional pavement under repeated moving loads of traffic [1][2][3][4]. Under this dynamic load condition, the pavement can face failure from serious rutting and fatigue cracking.…”

“…Thus, the thickness of the permeable road pavement design must be sized to support the moving traffic loads to ensure a longer life. In the past, permeable road pavements were mostly applied in light-traffic areas rather than heavytraffic areas [3,5,6]. In other words, the application scope of permeable road pavements is limited [4,6].…”