Stabilization of compressed earth blocks (CEB) by pozzolana based phosphate geopolymer binder: Physico-mechanical and microstructural investigations

Rolande Aurelie Tchouateu Kamwa; Sylvain Tome; Judicael Chongouang; Idriss Eguekeng; Alex Spieß; Markus N.A. Fetzer; Kamseu Elie; Christoph Janiak; Marie-Annie Etoh

Cleaner Materials (Jun 2022)

Stabilization of compressed earth blocks (CEB) by pozzolana based phosphate geopolymer binder: Physico-mechanical and microstructural investigations

Rolande Aurelie Tchouateu Kamwa,
Sylvain Tome,
Judicael Chongouang,
Idriss Eguekeng,
Alex Spieß,
Markus N.A. Fetzer,
Kamseu Elie,
Christoph Janiak,
Marie-Annie Etoh

Affiliations

Rolande Aurelie Tchouateu Kamwa: Department of Chemistry, Faculty of Sciences, University of Douala, Douala P.O. Box 24157, Cameroon
Sylvain Tome: Department of Chemistry, Faculty of Sciences, University of Douala, Douala P.O. Box 24157, Cameroon; Department of Civil Engineering, University Institute of Technology (IUT), University of Douala, P. O. Box. 8698 Douala, Cameroon; Corresponding author.
Judicael Chongouang: Department of Chemistry, Faculty of Sciences, University of Douala, Douala P.O. Box 24157, Cameroon
Idriss Eguekeng: Local Material Promotion Authority (MIPROMALO), P.O. Box, 2396 Yaoundé, Cameroun
Alex Spieß: Institut für Anorganische Chemie und Strukturchemie, Universität Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
Markus N.A. Fetzer: Institut für Anorganische Chemie und Strukturchemie, Universität Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
Kamseu Elie: Department of Civil Engineering, University Institute of Technology (IUT), University of Douala, P. O. Box. 8698 Douala, Cameroon
Christoph Janiak: Institut für Anorganische Chemie und Strukturchemie, Universität Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
Marie-Annie Etoh: Department of Chemistry, Faculty of Sciences, University of Douala, Douala P.O. Box 24157, Cameroon

Journal volume & issue: Vol. 4
p. 100062

Abstract

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This work proposes the poly(phospho-ferro-siloxo) binder resulting from the phosphoric acid activation of pozzolana (PZ) as a friendly stabilizing agent for compressed earth bricks (CEBs). Different proportions of pozzolana were incorporated into the clay soil (5, 10, 15 and 20 wt%). The CEBs were cured at 25 °C and at 70 °C. Powder X-ray diffraction (PXRD), Fourier transformed infrared spectroscopy (FTIR), water absorption as well as mechanical strength tests were used to characterize the 28 days aged CEBs. The compressive strength of CEBs varies from 9.2 to 20.6 MPa and 10.2 to 42.8 MPa at 25 °C and 70 °C, respectively. Water absorption ranges from 6 to 11% at 25 °C and 8 to 12% at 70 °C. These results indicated the possibility to use pozzolana based phosphate geopolymer binder as efficient stabilizer for the development of structural and functional CEBs. Pozzolana based phosphate geopolymer binder appears as energy-efficient and sustainable solution for the stabilization of CEB.

Published in Cleaner Materials

ISSN: 2772-3976 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/cleaner-materials

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