The production of porous brick material from diatomaceous earth and Brazil nut shell ash

E. Escalera; G. Garcia; R. Terán; R. Tegman; M. L. Antti; M. Odén

doi:10.1016/j.conbuildmat.2015.08.003

The production of porous brick material from diatomaceous earth and Brazil nut shell ash

E. Escalera, G. Garcia, R. Terán, R. Tegman, M. L. Antti, M. Odén

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	257-264
Number of pages	8
Journal	Construction and Building Materials
Volume	98
DOIs	https://doi.org/10.1016/j.conbuildmat.2015.08.003
State	Published - 15 Nov 2015
Externally published	Yes

Bibliographical note

Funding Information:
This work was financially supported by the Swedish International Development Cooperation Agency, SIDA. I would like to thank to Prof. Dr. Andreas Kaiser for helping with thermal conductivity measurements (DTU Energy) in Denmark. I would also like to express my gratitude to Ing. Mario Blanco (IGEMA-UMSA) for providing the diatomaceous earth and Dr. Julio Vargas for allowing us to perform the mechanical tests at the ETSFOR-UMSS in Bolivia.

Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.

Keywords

Brazil nut shell ash
Diatomaceous earth
SEM
Thermal conductivity
XRD

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10.1016/j.conbuildmat.2015.08.003

Cite this

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abstract = "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.",

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AU - Escalera, E.

AU - Garcia, G.

AU - Terán, R.

AU - Tegman, R.

AU - Antti, M. L.

AU - Odén, M.

PY - 2015/11/15

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AB - 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.

KW - Brazil nut shell ash

KW - Diatomaceous earth

KW - SEM

KW - Thermal conductivity

KW - XRD

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JO - Construction and Building Materials

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SN - 0950-0618

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The production of porous brick material from diatomaceous earth and Brazil nut shell ash

Abstract

Bibliographical note

Keywords

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