The impacts of raw and apatite-synthesized coal fly ash amendment on water retention capacity focusing on fly ash treatment, water repellency and surface area

Shenglei LIN; Mengzhu SONG; Hidetoshi KURAMOCHI; Fumitake TAKAHASHI

doi:10.14976/jals.28.S_119

DT13 Refereed Paper

The impacts of raw and apatite-synthesized coal fly ash amendment on water retention capacity focusing on fly ash treatment, water repellency and surface area

Shenglei LIN, Mengzhu SONG, Hidetoshi KURAMOCHI, Fumitake TAKAHASHI

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Keywords: coal fly ash, apatite synthesis, water retention capacity, water repellency, specific surface area

JOURNAL FREE ACCESS

2018 Volume 28 Issue S Pages 119-122

DOI https://doi.org/10.14976/jals.28.S_119

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Abstract

Coal fly ash (FA) was tested as soil water retention agent aiming for FA recycle in arid areas. Effects of raw and apatite-synthesized FA amendment on water retention capacity (WRC) of soils and sands were analyzed. Apatite-synthesized FA with certain phosphorous/calcium ratio was effective to increase WRC, in particular at high temperature. This study found that specific surface area and water repellency were insufficient to explain positive effect of apatite-synthesized FA amendment on WRC.

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