Iranian Journal of Ceramic Science & Engineering
Volume 13, Issue 2 (8-2024)
2024, 13(2): 0-0 |
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Moosavi A. Investigation of the role of SiO2 particles in the microstructure and mechanical properties of geopolymer composites. Iranian Journal of Ceramic Science & Engineering 2024; 13 (2)
URL: http://ijcse.ir/article-1-978-en.html
URL: http://ijcse.ir/article-1-978-en.html
1- , az_moosavi@yahoo.com
Abstract: (48 Views)
In this study, the microstructure and mechanical properties of a geopolymer composite based on metakaolin and an alkaline potassium silicate solution, were examined. To determine the optimal composition various molar ratios of x= 
=3, 3.25, 3.50, and 3.75, as well as y=
=0.8, 0.9, and 1 were evaluated. The optimal composition was identified with x=3.50 and y=0.9, designated as G, yielding a flexural strength of 4.20±0.06 MPa. Silica particles (S), ranging in size from 3.66 to 527 micrometers, were introduced as a particulate reinforcement at weight fractions of 10%, 15%, 20%, and 25% into the optimized geopolymer composition, followed by an assessment of mechanical strength and microstructure. The addition of 20 wt% silica aggregate (S20) significantly influenced the appearance of geopolymer samples and reduced the percentage of drying shrinkage. The flexural strength of the geopolymer composite sample (GS20) was measured at 15±0.21 MPa. This improvement in mechanical strength as attributed to the role of SiO2 particles in preventing crack propagation within the composite microstructure.
=3, 3.25, 3.50, and 3.75, as well as y= =0.8, 0.9, and 1 were evaluated. The optimal composition was identified with x=3.50 and y=0.9, designated as G, yielding a flexural strength of 4.20±0.06 MPa. Silica particles (S), ranging in size from 3.66 to 527 micrometers, were introduced as a particulate reinforcement at weight fractions of 10%, 15%, 20%, and 25% into the optimized geopolymer composition, followed by an assessment of mechanical strength and microstructure. The addition of 20 wt% silica aggregate (S20) significantly influenced the appearance of geopolymer samples and reduced the percentage of drying shrinkage. The flexural strength of the geopolymer composite sample (GS20) was measured at 15±0.21 MPa. This improvement in mechanical strength as attributed to the role of SiO2 particles in preventing crack propagation within the composite microstructure.
Type of Study: Research |
Subject:
New Methods of Processing and Fabrication of Ceramics
Received: 2025/02/15 | Accepted: 2025/08/17
Received: 2025/02/15 | Accepted: 2025/08/17
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