文献类型：期刊文献

英文题名：Novel cementitious materials produced from incinerator bottom ash

作者：Qiao, X. C.[1,2];Tyrer, M.[3];Poon, C. S.[4];Cheesemana, C. R.[1]

机构：[1]Univ London Imperial Coll Sci Technol & Med, Ctr Environm Control & Waste Management, Dept Civil & Environm Engn, London SW7 2AZ, England;[2]E China Univ Sci & Technol, Inst Resource & Proc Engn, Shanghai 200237, Peoples R China;[3]Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England;[4]Hong Kong Polytech Univ, Dept Civil & Struct Engn Environm Engn, Kowloon, Hong Kong, Peoples R China

年份：2008

卷号：52

期号：3

起止页码：496

外文期刊名：RESOURCES CONSERVATION AND RECYCLING

收录：;EI(收录号：20075010971958);WOS:【SCI-EXPANDED(收录号:WOS:000253134500003)】；

语种：英文

外文关键词：incinerator bottom ash; waste; incineration; pozzolanic; reuse

摘要：The fine fraction of incinerator bottom ash (IBA) obtained from an energy from waste plant has been milled and thermally treated at 800 degrees C to investigate the potential for exploiting IBA as a cementitious material. In addition to decomposition of CaCO(3) to CaO, thermal treatment increases the content of gehlenite (Ca(2)Al(2)SiO(7)), wollastonite (CaSiO(3)) and mayenite (Ca(12)Al(14)O(33)). Monolithic samples have been formed by adding 10 wt.% Ca(OH)(2) at 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 (Ca(4)Al(2)O(6)(CO(3))(0.67)(SO(3))(0.33)center dot 11 H(2)O) 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. (C) 2007 Elsevier B.V. All rights reserved.