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The production of porous brick material from diatomaceous earth and Brazil nut shell ash
Luleå University of Technology, Sweden; San Simon University, Bolivia.
Luleå University of Technology, Sweden.
San Simon University, Bolivia.
Luleå University of Technology, Sweden.
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2015 (Engelska)Ingår i: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526, Vol. 98, s. 257-264Artikel i tidskrift (Refereegranskat) 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 degrees 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 degrees C. The achieved high porosity was 49%, density 1.06 g/cm(3), thermal conductivity 0.20 W/(m K) and the compressive strength was 8.5 MPa. (C) 2015 Elsevier Ltd. All rights reserved.

Ort, förlag, år, upplaga, sidor
ELSEVIER SCI LTD , 2015. Vol. 98, s. 257-264
Nyckelord [en]
Diatomaceous earth; Brazil nut shell ash; Thermal conductivity; XRD; SEM
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Identifikatorer
URN: urn:nbn:se:liu:diva-122644DOI: 10.1016/j.conbuildmat.2015.08.003ISI: 000363069800028OAI: oai:DiVA.org:liu-122644DiVA, id: diva2:871769
Anmärkning

Funding Agencies|Swedish International Development Cooperation Agency, SIDA

Tillgänglig från: 2015-11-16 Skapad: 2015-11-13 Senast uppdaterad: 2017-12-01

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