Nepheline‐based water‐permeable bricks from coal gangue and aluminum hydroxide

Wu, Xiuwen; Ma, Hongwen; Wu, N. J.; Shi, Chun-Qing; Zhang, Zheng; Wang, Ya-Fang

doi:10.1002/ep.12329

Cited by 19 publications

(12 citation statements)

References 21 publications

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“…The permeability coefficient of the permeable brick was determined according to ASTM D2434-68 [17] and ASTM C1781/C1781M-15 [18]. The water permeability coefficient test device is shown in Figure 1 [19,20]:…”

Section: Study Methods Of Permeabilitymentioning

confidence: 99%

Study on Compressive Strength and Water Permeability of Steel Slag-Fly Ash Mixed Permeable Brick

2019

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In order to reduce stormwater runoff, permeable brick was prepared by compounding with fly ash and steel slag as the main substrate. The study found that the amount of steel slag has a significant influence on the compressive strength of permeable brick. When the proportion of steel slag is 6.5%, the compressive strength of permeable brick after 28 days curing can reach 26.32 MPa. The strength of permeable brick decreases with the increase of fly ash content, but the permeability coefficient increases significantly. The results show that the compressive strength and permeability coefficient of permeable bricks can reach a good level when the composite ratio of steel slag is 6%, fly ash is 30%, and the design target of porosity is 20%.

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Section: Study Methods Of Permeabilitymentioning

confidence: 99%

Study on Compressive Strength and Water Permeability of Steel Slag-Fly Ash Mixed Permeable Brick

2019

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“…Their maximum water holding capacity is about 13% (Wang et al, 2018), far smaller than that of the natural soils. Generally, the saturated hydraulic conductivity (Ksat) of materials is about one to three orders of magnitude higher than that of the natural soil (Wu et al, 2016;Zhou, 2018;Tang et al, 2019) for the reason that its principal particle components are far coarser than those of the natural soils. According to the suggested ratios, aggregate accounting for about 70% of total volume of concrete (Cai et al, 2018) and water cement ratio ranging from 0.3-0.4 (Debnath & Sarkar, 2019;Rahmani et al, 2020) were used in this study.…”

Section: Descriptionmentioning

confidence: 99%

A physical model demonstrating critical zone structure and flow processes in headwaters

Shen

Liu

Wang

et al. 2021

Preprint

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Equipped with complex terrain structure, physical models provide an alternative way in understanding and modeling how critical zone shapes hydrologic processes in headwaters for hydrology research and education. However, this type of physical models is limited by frustrating rain-erosion or gully-erosion. Herein, the technique of permeable bricks with cementation property that can help to solve the soil backfilling problem was adopted to construct a physical model with complex terrain. Through material tests for different aggregate-cement ratios, we found that saturated hydraulic conductivity (Ksat) of samples is well correlated with bulk density (BD), e.g., the correlation coefficient (R 2) is as high as 0.75 between Ksat and BD. Then, the test material selected was applied as a soil alternative in the physical model in which two artificial soil layers have been designed through altering BD. Additionally, the non-uniform scaling of terrain was applied for the convenience of teaching, and it was constructed by reducing a steep 0.31-ha zero-order basin to 1/130 in horizontal direction and 1/30 in vertical direction. Multiple observation items, e.g., shallow groundwater level, soil moisture content, subsurface and surface runoff, etc., could provide potential opportunity to explore the role of soil and terrain in modulating streamflow. We'd like to share this effective tool to facilitate the research works of critical zone science and enrich experimental teaching methods.

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“…However, its use rate is still limited. Meanwhile, coal gangue (CG), a by-product in the coal industry, has been widely studied and used in studies [ 13 , 14 , 15 , 16 ]. Currently, many researchers have focused on studying the use of CG in pavements and cementing building materials thanks to its high content of Al 2 O 3 and SiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Improved Permeability of Ceramic Waste-Based Bricks

Zhou

Kang

et al. 2022

Materials

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The resource and large-scale utilization of waste ceramic materials, magnesium slag, and coal gangue are one of the important ways for the sustainable development in metallurgy, coal, and other related enterprises. In this paper, waste ceramic materials were used as aggregates; coal gangue and magnesium slag were used as mixed binder; and the all solid-waste-based permeable bricks with excellent performance were prepared by forming pressure at 5 MPa. The mechanical properties and water permeability of the all-solid-waste-based permeable bricks were evaluated. The results proved that the porous channel of permeable brick is mainly composed of waste ceramic materials with a particle size of 2–3 mm. Pore structures below 200 μm were mainly composed of fine aggregate and mixed binder. Using 60% coarse aggregate, 20% fine aggregate, 10% coal gangue, and 10% magnesium slag as raw materials, the all-solid-waste-based permeable bricks were obtained by pressing at 6 MPa and sintering at 1200 °C, which exhibited the best performance, and its water permeability, compressive strength, and apparent porosity were 1.56 × 10−2 cm/s, 35.45 MPa, and 13.15%, respectively. Excellent water permeability, compressive strength, and apparent porosity of the all solid-waste-based permeable bricks were ascribed to the high content of connecting open pores, and closely adhesive force were ascribed to the porous microstructure constructed by the grading of waste ceramic materials and the tight conjoined points of the liquid phases in coal gangue and magnesium slag at a high sintering temperature.

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Nepheline‐based water‐permeable bricks from coal gangue and aluminum hydroxide

Cited by 19 publications

References 21 publications

Study on Compressive Strength and Water Permeability of Steel Slag-Fly Ash Mixed Permeable Brick

Study on Compressive Strength and Water Permeability of Steel Slag-Fly Ash Mixed Permeable Brick

A physical model demonstrating critical zone structure and flow processes in headwaters

Microstructure Evolution and Improved Permeability of Ceramic Waste-Based Bricks

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