Experimental simulation study on pore clogging mechanism of porous pavement

Zhang, Jiong; She, Rui; Dai, Zhaoxia; Ming, Ruiping; Ma, Guodong; Cui, Xinzhuang; Li, Li

doi:10.1016/j.conbuildmat.2018.07.199

Cited by 39 publications

(12 citation statements)

References 12 publications

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“…Similar to the results from single-layer filtration apparatus, the filtered amounts of TSS increased in the S-shaped curve (sigmoid curve) as displayed in Figure 5c,d. Considering that the clogging area development can be divided into rapid clogging section fitted by a logistic function, clogging recovery section fitted by a linear function, and stable clogging fitted by a horizontal linear line [27], the lumped empirical model based on a simplified sigmoidal function was fitted to the cumulative filtered amounts of TSS for each BA filter column. As summarized in Table 3 showing the excellent representation of cumulative filtered amounts of TSS at cumulative TSS loadings (i.e., R 2 ≥ 0.982) using a simplified sigmoidal function, the cumulative filtered amounts of TSS at cumulative TSS loadings were estimated at complete clogging.…”

Section: Estimation Of Filtered Amounts Of Tss With the Depth Of Ba Fmentioning

confidence: 99%

Application of Bottom Ash as Filter Media for Construction Site Runoff Control

Bang

Joo

Kim

et al. 2020

Water

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The potential application of bottom ash (BA) for construction site runoff control as an alternative filter media with high removal efficiency of total suspended solids (TSS) and longer operation period were evaluated. Both lab-scale single-layer and pilot-scale multi-layer filtration experiments were performed using BA filter media with different particle sizes and various volumetric flow rates. Due to the mesoporous, irregular, and spherical shape of gravel-size BA filter media used in this study, relatively low surface area, negligible pore volume, and greater pore size were observed. Both TSS removal efficiencies and clogging of BA filter media were a complex function of particle size of BA filter media and loading rate of TSS. Incoming TSS particles did not significantly penetrate beyond 46-cm BA filter media depth, accumulating on the upper layers and gradually forming a clogging layer to critical thickness, and finally the clogging filtration mechanism dominated the overall removal efficiency of TSS. Accumulation of TSS on BA filter media can be explained by the lumped sigmoidal empirical model, and an exponential decline in accumulation of TSS with depth results in minimal accumulation beneath the clogging layer. As practical implications, BA filter media depth of less than 46 cm is recommended with dual- or multi-media filters using mixtures of gravel-size BA and silt-size fine media, and a combination of detention basins can reduce frequent periodic de-clogging operation and management.

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Section: Estimation Of Filtered Amounts Of Tss With the Depth Of Ba Fmentioning

confidence: 99%

Application of Bottom Ash as Filter Media for Construction Site Runoff Control

Bang

Joo

Kim

et al. 2020

Water

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“…is buildup causes clogging in the pores, thereby gradually but significantly changing the hydraulic properties of the permeable pavement, which in turn will affect the mechanical performance of pavement [6][7][8][9]. Based on the previous research, clogging can be mainly due to two types of siltation processes: (a) long-term clogging process by urban runoff with fine particles and (b) shortterm clogging by a sudden slump or landslide [10]. As the long-term service performance is greatly hindered by these clogging characteristics, studies have been conducted by applying fine particles accumulating in the void spaces of porous pavements based on different watering methods [11].…”

Section: Introductionmentioning

confidence: 99%

Estimation of Hydraulic Properties in Permeable Pavement Subjected to Clogging Simulation

Lü

Liu

et al. 2022

Advances in Civil Engineering

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Permeable pavements are often affected by pore clogging, which leads to their functional failure and reduced service life. However, the clogging mechanism and its impact on the permeability and complex pore microstructures in pervious pavement remain unclear. The aim of current study is to quantify the clogging behavior in pervious pavement materials and carry out investigations on the development of pore characteristics and permeability. Novel polyurethane-bound pervious mixture (PUPM) was adopted for comparative study in present research with conventional Porous Asphalt (PA). The Aachen Polishing Machine (APM) was selected to perfectly serve as a simulator for clogging process of pavement in the actual service condition. The permeability and pore microstructure of the pervious pavement material were then characterized by using the self-developed permeameter and X-ray Computed Tomography (CT) scanning, respectively. The development of pore characteristics in terms of clogging was experimentally illustrated. Based on the pore characteristics, the flow behavior of PUPM subjected to different clogging periods was predicted based on the developed non-Darcy flow model. The developed experiments and analysis can further strengthen the understanding of the clogging mechanism within the porous pavement material. The results can also serve for the optimization of the pervious pavement design in the engineering application.

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“…Similarly, biological clogging brought by bacteria and algae and penetration of plant roots can also happen [15]. Dry materials contain sand, silt, and clay sediments and cause clogging from surrounding areas [16], including waste from roads or other areas carried through a vehicle, small particles produced on the pavement due to surface wear or other degradation, and organic matter from plants [11,17]. Schaefer studied that sand resulted in a significant decrease in permeability, while fine silty clay had a little effect.…”

Section: Introductionmentioning

confidence: 99%

“…e permeability coefficients of PCP are usually from the range of 2-6 mm/s, and some of them increase even up to 10 mm/s, and the porosity varies between 15 and 25%. e suspended particles can block the pores of PCP, like debris and sediment in the surface runoff causing to reduce the permeability and also reducing the age of PC [17,37], and the compressive strength is generally between 3.5 MPa and 30 MPa. PC has been widely used in drainage facilities of municipal roads, park sidewalks, parking lots, and other places [38].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Test and Evaluation Analysis of Permeable Concrete (PC) Clogging by Using Steel Slag

Cao

Shah

Wang

et al. 2022

Advances in Civil Engineering

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In recent decade, researchers have more attention to water resource protection and forward the concept of sponge city construction. PC is becoming more and more popular as a rainwater management tool because of fast climate changes worldwide. In this experiment, PC specimens were prepared with steel slag as aggregate, and the targeted porosity of specimens was 15%, 20%, and 25% respectively, and the ratio of water to cement was 0.38, 0.4, and 0.42. The PC specimens under the 200 mm high head are the most severely blocked; 0.283 m/s high-speed horizontal runoff appears after the rapid plugging stage later in the other two types of speed tests. With time, the plugging effect of the test specimen is almost the same; the clogging degree of the PC sample with the porosity of 25% is more obvious than that of other porosity test specimens. The PC with large porosity is more serious to clogging because the higher seepage velocity will enter the internal tunnel with higher penetration force, which increases the possibility of clogging. Tests have shown that, at different rainwater runoff head heights, the PC specimens under the 200 mm high head are the most severely blocked; 0.283 m/s high-speed horizontal runoff appears after the rapid plugging stage later in the other two types of speed tests but over time. With time, the plugging effect of the test specimen was almost the same; the clogging degree of the permeable concrete sample with the porosity of 25% is more obvious than that of other porosity test specimens. While it is noticed that the compressive strength of the PC after clogging has decreased in the freeze-thaw environment, the destruction process is faster than the unblocked test specimen.

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Experimental simulation study on pore clogging mechanism of porous pavement

Cited by 39 publications

References 12 publications

Application of Bottom Ash as Filter Media for Construction Site Runoff Control

Application of Bottom Ash as Filter Media for Construction Site Runoff Control

Estimation of Hydraulic Properties in Permeable Pavement Subjected to Clogging Simulation

Comprehensive Test and Evaluation Analysis of Permeable Concrete (PC) Clogging by Using Steel Slag

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