Production of lightweight concrete using incinerator bottom ash

X. C. Qiao; B. R. Ng; M. Tyrer; C. S. Poon; C. R. Cheeseman

doi:10.1016/j.conbuildmat.2006.11.013

Production of lightweight concrete using incinerator bottom ash

X. C. Qiao, B. R. Ng, M. Tyrer, C. S. Poon, C. R. Cheeseman

Research output: Contribution to journal › Article › peer-review

76 Citations (Scopus)

Abstract

The medium size fraction (14-40 mm) of aged incinerator bottom ash (IBA) obtained from a major UK energy from waste (EfW) plant has been crushed to less than 5 mm (CIBA) and thermally treated at 600 °C (TCIBA6), 700 °C (TCIBA7), 800 °C (TCIBA8) and 900 °C (TCIBA9). Thermal treatment reduced the organic carbon content and increased the amount of wollastonite (CaSiO₃), mayenite (Ca₁₂Al₁₄O₃₃) and gehlenite (Ca₂Al₂SiO₇). The crushed and thermally treated IBA has been mixed with Portland cement (PC) at different water/solid (w/s) ratios and with different proportions of PC and Ca(OH)₂. The volume expansion during setting and bulk densities and compressive strengths were determined. Expansion occurred in all mixes contained IBA during curing. A lightweight material (density less than 1.8 g/cm³) with 28 day compressive strength of higher than 10 MPa was prepared by mixing 20 wt% PC with 80 wt% TCIBA8 at w/s ratio of 0.20. The expansion and associated lightweight properties result from gas evolution during curing due to residual metallic Al in the IBA. The main crystalline hydration products in 28 day cured samples were portlandite (Ca(OH)₂), calcite (CaCO₃) and calcium aluminate carbonate hydrates (Ca₄Al₂O₆(CO₃)_0.5 · 12 H₂O and Ca₈Al₄O₁₄CO₂ · 24H₂O).

Original language	English
Pages (from-to)	473-480
Number of pages	8
Journal	Construction and Building Materials
Volume	22
Issue number	4
Early online date	2 Jan 2007
DOIs	https://doi.org/10.1016/j.conbuildmat.2006.11.013
Publication status	Published - Apr 2008
Externally published	Yes

Keywords

Incinerator bottom ash
Light weight concrete
Pozzolanic
Thermal treatment
Waste incineration

ASJC Scopus subject areas

Civil and Structural Engineering
Materials Science(all)

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10.1016/j.conbuildmat.2006.11.013

Cite this

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title = "Production of lightweight concrete using incinerator bottom ash",

abstract = "The medium size fraction (14-40 mm) of aged incinerator bottom ash (IBA) obtained from a major UK energy from waste (EfW) plant has been crushed to less than 5 mm (CIBA) and thermally treated at 600 °C (TCIBA6), 700 °C (TCIBA7), 800 °C (TCIBA8) and 900 °C (TCIBA9). Thermal treatment reduced the organic carbon content and increased the amount of wollastonite (CaSiO3), mayenite (Ca12Al14O33) and gehlenite (Ca2Al2SiO7). The crushed and thermally treated IBA has been mixed with Portland cement (PC) at different water/solid (w/s) ratios and with different proportions of PC and Ca(OH)2. The volume expansion during setting and bulk densities and compressive strengths were determined. Expansion occurred in all mixes contained IBA during curing. A lightweight material (density less than 1.8 g/cm3) with 28 day compressive strength of higher than 10 MPa was prepared by mixing 20 wt% PC with 80 wt% TCIBA8 at w/s ratio of 0.20. The expansion and associated lightweight properties result from gas evolution during curing due to residual metallic Al in the IBA. The main crystalline hydration products in 28 day cured samples were portlandite (Ca(OH)2), calcite (CaCO3) and calcium aluminate carbonate hydrates (Ca4Al2O6(CO3)0.5 · 12 H2O and Ca8Al4O14CO2 · 24H2O).",

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AU - Qiao, X. C.

AU - Ng, B. R.

AU - Tyrer, M.

AU - Poon, C. S.

AU - Cheeseman, C. R.

PY - 2008/4

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AB - The medium size fraction (14-40 mm) of aged incinerator bottom ash (IBA) obtained from a major UK energy from waste (EfW) plant has been crushed to less than 5 mm (CIBA) and thermally treated at 600 °C (TCIBA6), 700 °C (TCIBA7), 800 °C (TCIBA8) and 900 °C (TCIBA9). Thermal treatment reduced the organic carbon content and increased the amount of wollastonite (CaSiO3), mayenite (Ca12Al14O33) and gehlenite (Ca2Al2SiO7). The crushed and thermally treated IBA has been mixed with Portland cement (PC) at different water/solid (w/s) ratios and with different proportions of PC and Ca(OH)2. The volume expansion during setting and bulk densities and compressive strengths were determined. Expansion occurred in all mixes contained IBA during curing. A lightweight material (density less than 1.8 g/cm3) with 28 day compressive strength of higher than 10 MPa was prepared by mixing 20 wt% PC with 80 wt% TCIBA8 at w/s ratio of 0.20. The expansion and associated lightweight properties result from gas evolution during curing due to residual metallic Al in the IBA. The main crystalline hydration products in 28 day cured samples were portlandite (Ca(OH)2), calcite (CaCO3) and calcium aluminate carbonate hydrates (Ca4Al2O6(CO3)0.5 · 12 H2O and Ca8Al4O14CO2 · 24H2O).

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KW - Light weight concrete

KW - Pozzolanic

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ER -

Production of lightweight concrete using incinerator bottom ash

Abstract

Keywords

ASJC Scopus subject areas

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