TY - JOUR

T1 - A comparative study of the compressive strengths and microstructural properties of geopolymer cements from metakaolin and waste fired brick as aluminosilicate sources

AU - Riyap, Hamed I.

AU - Banenzoué, Charles

AU - Tchakouté, Hervé Kouamo

AU - Rüscher, Claus H.

AU - Nanseu-Njiki, C. P.

N1 - Funding Information: Dr. Tchakouté Kouamo Hervé gratefully acknowledges the Alexander von Humboldt Foundation for its financial support this work under Grant No. KAM/1155741 GFHERMES-P. The authors would like to thank Dr. Valerie Petrov for SEM observations.

PY - 2021/3

Y1 - 2021/3

N2 - The main target of this work is to compare the compressive strengths and the microstructural properties geopolymer cements from waste fired brick as low-value aluminosilicate-rich waste and metakaolin. The chemical reagent used in this investigation is a sodium waterglass from rice husk ash. The obtained results show that waste fired brick contains a higher amount of SiO2 (60.98 wt%). The quartz content in the waste fired brick, standard and local metakaolins was estimated at approximately 8, 2 and 8 wt%, respectively. The X-ray patterns of these aluminosilicates indicate the broad hump structure between 15 and 35° (2θ) corresponding to the amorphous aluminosilicate phase. Besides this amorphous phase, waste fired brick shows the broad bands of hematite at 33.29 and 35.87° (2θ) indicating that some Al is replaced by Fe in IV-fold coordination. The micrographs of metakaolins show the platy-shaped with coarse-grain particles and the one of waste fired bricks indicates the platy- and spherical-shaped with smaller particle sizes. The compressive strength values of geopolymer cements from local and standard metakaolins are 40.32 and 44.46 MPa, respectively. Whereas the one from waste fired brick is 47.82 MPa. It was found that waste fired brick could be used as an alternative low-value aluminosilicate-rich waste for producing geopolymer cements with high compressive strength.

AB - The main target of this work is to compare the compressive strengths and the microstructural properties geopolymer cements from waste fired brick as low-value aluminosilicate-rich waste and metakaolin. The chemical reagent used in this investigation is a sodium waterglass from rice husk ash. The obtained results show that waste fired brick contains a higher amount of SiO2 (60.98 wt%). The quartz content in the waste fired brick, standard and local metakaolins was estimated at approximately 8, 2 and 8 wt%, respectively. The X-ray patterns of these aluminosilicates indicate the broad hump structure between 15 and 35° (2θ) corresponding to the amorphous aluminosilicate phase. Besides this amorphous phase, waste fired brick shows the broad bands of hematite at 33.29 and 35.87° (2θ) indicating that some Al is replaced by Fe in IV-fold coordination. The micrographs of metakaolins show the platy-shaped with coarse-grain particles and the one of waste fired bricks indicates the platy- and spherical-shaped with smaller particle sizes. The compressive strength values of geopolymer cements from local and standard metakaolins are 40.32 and 44.46 MPa, respectively. Whereas the one from waste fired brick is 47.82 MPa. It was found that waste fired brick could be used as an alternative low-value aluminosilicate-rich waste for producing geopolymer cements with high compressive strength.

KW - Chemical reagent

KW - Compressive strength

KW - Geopolymer cements

KW - Metakaolin

KW - Rice husk ash

KW - Waste fired brick

UR - http://www.scopus.com/inward/record.url?scp=85096495545&partnerID=8YFLogxK

U2 - 10.1007/s43207-020-00097-y

DO - 10.1007/s43207-020-00097-y

M3 - Article

AN - SCOPUS:85096495545

VL - 58

SP - 236

EP - 247

JO - Journal of the Korean Ceramic Society

JF - Journal of the Korean Ceramic Society

SN - 1229-7801

IS - 2

ER -