| Production of fired construction brick from high sulfate-containing fly ash with boric acid addition. | |
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MedLine Citation:
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PMID: 19423597 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The increase of power plant capacity has led to the production of an increasing amount of fly ash that causes high environmental impact in Turkey. Some of the fly ash is utilized within the fired brick industry but high sulfate-containing fly ash creates severe problems during sintering of the fired brick. This study attempted to investigate the potential for converting high sulfate-containing fly ash into useful material for the construction industry by the addition of boric acid. The chemical and mineralogical composition of fly ash and clay were investigated. Boric acid (H(3)BO(3)) was added to fly ash-clay mixtures with up to 5 wt.%. Six different series of test samples were produced by uniaxial pressing. The samples were fired at the industrial clay-brick firing temperatures of 800, 900 and 1000 degrees C. The microstructures of the fired samples were investigated by scanning electron microscopy and some physical and mechanical properties were measured. It was concluded that the firing at conventional brick firing temperature of high sulfate fly ash without any addition of boric acid resulted in very weak strength bricks. The addition of boric acid and clay simultaneously to the high sulfate- containing fly ash brick dramatically increased the compressive strength of the samples at a firing temperature of 1000 degrees C by modifying the sintering behaviour of high sulfate fly ash. |
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Authors:
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M Serhat Başpinar; Erhan Kahraman; Gökhan Görhan; Ismail Demir |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-05-07 |
Journal Detail:
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Title: Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA Volume: 28 ISSN: 1399-3070 ISO Abbreviation: Waste Manag Res Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2010-01-12 Completed Date: 2010-11-12 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9881064 Medline TA: Waste Manag Res Country: England |
Other Details:
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Languages: eng Pagination: 4-10 Citation Subset: IM |
Affiliation:
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Afyon Kocatepe University, Technical Education Faculty, Afyonkarahisar, Turkey. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aluminum Silicates
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chemistry* Boric Acids / chemistry* Carbon / chemistry* Compressive Strength Conservation of Natural Resources / methods* Construction Materials* Hot Temperature Industrial Waste Particulate Matter / chemistry* Power Plants Refuse Disposal / methods* Sulfates / analysis* Turkey |
| Chemical | |
Reg. No./Substance:
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0/Aluminum Silicates; 0/Boric Acids; 0/Industrial Waste; 0/Particulate Matter; 0/Sulfates; 11113-50-1/boric acid; 1302-87-0/clay; 68131-74-8/fly ash; 7440-44-0/Carbon |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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