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The production of porous brick material from diatomaceous earth and Brazil nut shell ash
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
Chemistry Department, San Simon University.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
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2015 (English)In: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526, Vol. 98, p. 257-264Article in journal (Refereed) Published
Abstract [en]

Diatomaceous earth was mixed with Brazil nut shell ash (BNS ash) in different amounts between 0 and 30 wt% and sintered at temperatures between 750 and 950 °C. The BNS ash contains 33 wt% K2O and 11 wt% CaO mainly in carbonate form. The addition of BNS ash into the diatomaceous earth caused significant changes of the microstructure after sintering. The BNS ash addition produces lightweight porous bricks with acceptable strength at lower sintering temperature. The best combination of strength and porosity was achieved for a mixture of 10 wt% of BNS ash in the diatomaceous earth sintered at 850 °C. The achieved high porosity was 49%, density 1.06 g/cm3, thermal conductivity 0.20 W/(m K) and the compressive strength was 8.5 MPa.

Place, publisher, year, edition, pages
2015. Vol. 98, p. 257-264
National Category
Chemical Process Engineering Other Materials Engineering
Research subject
Chemical Technology; Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-3229DOI: 10.1016/j.conbuildmat.2015.08.003ISI: 000363069800028Scopus ID: 2-s2.0-84952660413Local ID: 106cc0c1-d578-4d7c-a985-aa36b10f3495OAI: oai:DiVA.org:ltu-3229DiVA, id: diva2:976085
Note
Validerad; 2015; Nivå 2; 20150825 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Escalera, EdwinGarcia, GustavoTegman, RagnarAntti, Marta-LenaOdén, Magnus

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