In order to utilize solid wastes, ceramic facing brick was made form East-lake sediment and some additives. The strength and freeze-thaw resistance of the samples were tested, and the crystal phases and microstructure...In order to utilize solid wastes, ceramic facing brick was made form East-lake sediment and some additives. The strength and freeze-thaw resistance of the samples were tested, and the crystal phases and microstructures were studied by XRD and SEM. The results indicate that the samples have a wide firing temperature range. The main crystal phases are CaA12SizOs, a-Al203, Fe203, which distribute uniformly in the samples. The sample have the best properties in the series ＇Ca-A1-Si＇, and water absorption （Wa）, porosity （Pa）, bulk density （D）, bending strength and compressive strength are 7.24%, 15.82%, 2.19 g.cm＂3, 45.57 MPa and 56.81 MPa respectively, when the addition amount of East-lake sediment is 80% and the firing temperature is 1 100 ~C. In the series ＇K-A1-Si＇, the sample with the best properties was obtained when addition amount of East-lake sediment was 70% and firing temperature was 1 060 ~C. The water absorption, porosity, bulk density, bending strength and compressive strength are 7.62%, 16.37%, 2.15 g ~ cm＂3, 39.26 MPa, and 50.81 MPa respectively. They all come up to the national standardization, and meet the needs of manufacturing production.展开更多
This study presents the development of geopolymer bricks synthetized from industrial waste,including fly ash mixed with concrete residue containing aluminosilicate compound.The above two ingredients are mixed accordin...This study presents the development of geopolymer bricks synthetized from industrial waste,including fly ash mixed with concrete residue containing aluminosilicate compound.The above two ingredients are mixed according to five ratios:100:0,95:5,90:10,85:15,and 80:20.The mixture’s physico-mechanical properties,in terms of water absorption and the compressive strength of the geopolymer bricks,are investigated according to the TIS 168-2546 standard.Scanning electron microscopy(SEM)and X-ray diffraction(XRD)analyses are used to investigate the microstructure and the elemental and phase composition of the brick specimens.The results indicate that the combination of fly ash and concrete residue represents a suitable approach to brick production,as required by the TIS 168–2546 standard.展开更多
文摘In order to utilize solid wastes, ceramic facing brick was made form East-lake sediment and some additives. The strength and freeze-thaw resistance of the samples were tested, and the crystal phases and microstructures were studied by XRD and SEM. The results indicate that the samples have a wide firing temperature range. The main crystal phases are CaA12SizOs, a-Al203, Fe203, which distribute uniformly in the samples. The sample have the best properties in the series ＇Ca-A1-Si＇, and water absorption （Wa）, porosity （Pa）, bulk density （D）, bending strength and compressive strength are 7.24%, 15.82%, 2.19 g.cm＂3, 45.57 MPa and 56.81 MPa respectively, when the addition amount of East-lake sediment is 80% and the firing temperature is 1 100 ~C. In the series ＇K-A1-Si＇, the sample with the best properties was obtained when addition amount of East-lake sediment was 70% and firing temperature was 1 060 ~C. The water absorption, porosity, bulk density, bending strength and compressive strength are 7.62%, 16.37%, 2.15 g ~ cm＂3, 39.26 MPa, and 50.81 MPa respectively. They all come up to the national standardization, and meet the needs of manufacturing production.
基金supported by Department of Environmental Science,Faculty of Science and partially supported by the Sci SuperⅢFund(Ratchadaphiseksomphot Endowment Fund)Chulalongkorn University.
文摘This study presents the development of geopolymer bricks synthetized from industrial waste,including fly ash mixed with concrete residue containing aluminosilicate compound.The above two ingredients are mixed according to five ratios:100:0,95:5,90:10,85:15,and 80:20.The mixture’s physico-mechanical properties,in terms of water absorption and the compressive strength of the geopolymer bricks,are investigated according to the TIS 168-2546 standard.Scanning electron microscopy(SEM)and X-ray diffraction(XRD)analyses are used to investigate the microstructure and the elemental and phase composition of the brick specimens.The results indicate that the combination of fly ash and concrete residue represents a suitable approach to brick production,as required by the TIS 168–2546 standard.
