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Updated: Jul 27, 2025

Operation of a 25 KWth Calcium Looping Pilot-plant with High Oxygen Concentrations in the Calciner
06:34

Operation of a 25 KWth Calcium Looping Pilot-plant with High Oxygen Concentrations in the Calciner

Published on: October 25, 2017

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一种基于粘土煤飞灰的双液压反应,用于控制酸性矿井排水

Beven Mafoko1,2, Willis Gwenzi1,3,4, Nhamo Chaukura5

  • 1Biosystems and Environmental Engineering Research Group, Department of Agricultural and Biosystems Engineering, University of Zimbabwe, Mt. Pleasant, P.O. Box MP167, Harare, Zimbabwe.

Bulletin of environmental contamination and toxicology
|June 7, 2023
PubMed
概括

粘土和煤炭飞灰混合物 (7:3比) 有效地限制了危险的液,如酸性矿井排水 (AMD). 这种工程体表现出与传统压缩粘土相匹配的液压性能,同时增强了污染物去除能力.

关键词:
溶解液是一种溶解液.自然的粘土是天然的.污染物 污染物 污染物整治 整治 整治 整治

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Acid Attack on Concrete01:21

Acid Attack on Concrete

When acids come into contact with concrete, they initiate a chemical reaction that dissolves the hydrated cement paste. This process leads to softening and structural weakening of the concrete. This issue is commonly observed in environments such as chimneys, sewers, and industrial settings. The severity of the damage increases as the pH of the water interacting with the concrete drops below 6.5. In particular, a pH under 4.5 can cause significant concrete damage.
The rate at which hydrogen...
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Waterproofing and Anti-Bacterial Admixtures in Concrete01:22

Waterproofing and Anti-Bacterial Admixtures in Concrete

Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
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Alkali Aggregate Reaction in Concrete01:26

Alkali Aggregate Reaction in Concrete

The alkali-aggregate reaction in concrete involves natural siliceous minerals in aggregates reacting with alkaline hydroxides derived from cement alkalis. This reaction forms an alkali-silica gel that absorbs water, swells, and increases in volume, which is confined by the surrounding cement paste, creating internal pressures that crack and disrupt the concrete. The extent of expansion and damage can be partly attributed to the alkali-silica reaction's osmotic hydraulic pressure and the...
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Pozzolans01:21

Pozzolans

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Fly ash is...
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Accelerators01:17

Accelerators

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Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

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