Performance appraisal of industrial waste incineration bottom ash as controlled low-strength material

Razak, H.A. and Naganathan, S. and Hamid, S.N.A. (2009) Performance appraisal of industrial waste incineration bottom ash as controlled low-strength material. Journal of Hazardous Materials, 172 (2-3). pp. 862-867. ISSN 0304-3894, DOI

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Controlled low-strength material (CLSM) is slurry made by mixing sand, cement, ash, and water. It is primarily used as a replacement for soil and structural fillings. This paper presents the findings of a preliminary investigation carried out on the performance of industrial waste incineration bottom ash as CLSM. CLSM mixes were designed using industrial waste incineration bottom ash, and cement. Tests for density, setting time, bleed, and compressive strength on cubes under various curing conditions, corrosivity, and leaching of heavy metals and salts were carried out on the CLSM mixtures, and the results discussed. Compressive strength for the designed CLSM mixtures ranged from 0.1 to 1.7 MPa. It is shown that the variations in curing conditions have less influence on the compressive strength of CLSM at high values of water to cement ratio (w/c), but low values of w/c influences the strength of CLSM. The CLSM produced does not exhibit corrosive characters as evidenced by pH. Leaching of heavy metals and salts is higher in bleed than in leachate collected from hardened CLSM. Cement reduces the leaching of Boron in bleed. It is concluded that there is good potential for the use of industrial waste incineration bottom ash in CLSM. © 2009 Elsevier B.V. All rights reserved.

Item Type: Article
Additional Information: Razak, Hashim Abdul Naganathan, Sivakumar Hamid, Siti Nadzriah Abdul eng Research Support, Non-U.S. Gov't Netherlands 2009/08/12 09:00 J Hazard Mater. 2009 Dec 30;172(2-3):862-7. doi: 10.1016/j.jhazmat.2009.07.070. Epub 2009 Jul 25.
Uncontrolled Keywords: Bleed, Compressive strength, Controlled low-strength material, Leachate, pH, Setting time, Bottom ash, Corrosivity, Curing condition, Leachates, Performance appraisal, Water-to-cement ratios, Ash handling, Boron, Boron compounds, Cements, Concrete mixing, Confocal microscopy, Curing, Heavy metals, Leaching, Refuse incinerators, Salts, Waste incineration, cement, heavy metal, water, density, incineration, industrial waste, settling velocity, testing method, article, ash, corrosion, hydration, time, Carbon, Conservation of Natural Resources, Manufactured Materials, Materials Testing, Particulate Matter
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 24 Jan 2014 14:34
Last Modified: 26 Dec 2014 02:20

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