Novel cementitious materials produced from incinerator bottom ash

X. C. Qiao; M. Tyrer; Chi Sun Poon; C. R. Cheeseman

doi:10.1016/j.resconrec.2007.06.003

Novel cementitious materials produced from incinerator bottom ash

X. C. Qiao, M. Tyrer, Chi Sun Poon, C. R. Cheeseman

Research output: Journal article publication › Journal article › Academic research › peer-review

63 Citations (Scopus)

Abstract

The fine fraction of incinerator bottom ash (IBA) obtained from an energy from waste plant has been milled and thermally treated at 800 °C to investigate the potential for exploiting IBA as a cementitious material. In addition to decomposition of CaCO3to CaO, thermal treatment increases the content of gehlenite (Ca2Al2SiO7), wollastonite (CaSiO3) and mayenite (Ca12Al14O33). Monolithic samples have been formed by adding 10 wt.% Ca(OH)2at water to solid (w/s) ratios of 0.50 and 0.20. The high w/s samples were formed by casting and the low w/s samples were formed by pressing. The setting time and physical properties of cured samples were determined including compressive strength and the extent of reaction of Ca(OH)2. Hydration products included a mixed sulphate-carbonate AFm-type phase (Ca4Al2O6(CO3)0.67(SO3)0.33·11H2O) and a low Ca/Si ratio C-S-H gel. The release of hydrogen gas from IBA due to residual Al metal did not cause macro-porosity to form in the pressed samples, and these novel materials had significant compressive strengths of 12.7 and 14.7 MPa at 7 and 28 days, respectively.

Original language	English
Pages (from-to)	496-510
Number of pages	15
Journal	Resources, Conservation and Recycling
Volume	52
Issue number	3
DOIs	https://doi.org/10.1016/j.resconrec.2007.06.003
Publication status	Published - 1 Jan 2008

Keywords

Incineration
Incinerator bottom ash
Pozzolanic
Reuse
Waste

ASJC Scopus subject areas

Waste Management and Disposal
Economics and Econometrics

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10.1016/j.resconrec.2007.06.003

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Novel cementitious materials produced from incinerator bottom ash

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Keywords

ASJC Scopus subject areas

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