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- 저자 : Rüscher Claus H. (검색결과 1 건)
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Riyap Hamed I.,Banenzoué Charles,Tchakouté Hervé Kouamo,Nanseu Charles N. P.,Rüscher Claus H. 한국세라믹학회 2021 한국세라믹학회지 Vol.58 No.2
The main target of this work is to compare the compressive strengths and the microstructural properties geopolymer cements from waste fi red 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 fi red brick contains a higher amount of SiO 2 (60.98 wt%). The quartz content in the waste fi red 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° (2 θ ) corresponding to the amorphous aluminosilicate phase. Besides this amorphous phase, waste fi red brick shows the broad bands of hematite at 33.29 and 35.87° (2 θ ) 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 fi red 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 fi red brick is 47.82 MPa. It was found that waste fi red brick could be used as an alternative low-value aluminosilicate-rich waste for producing geopolymer cements with high compressive strength.
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