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Effects of sintering additive on properties and microstructure of high strength Lytag in low water absorption



Title: Effects of sintering additive on properties and microstructure of high strength Lytag in low water absorption
Author(s): H. Deng, Y. Yang, X. Gao, H. Ba
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 833 - 840
Total Pages: 8
Nb references: 10
Language: English


Abstract: Fly ash used as the main raw materials, incorporated with sintering expansion additive and fluxing additive in different ratio, was sintered high-strength lightweight aggregates of fly ash (Lytag) in the laboratory-controlled electric furnace. The results show that in the sintering temperature range of 1250 to 1280 °C, retaining time of 5 min to 10 min, the bulk density and the apparent density and 24 h water absorption of Lytag decrease with the increase of sintering additive and the decrease of the amount of fly ash. The addition of fluxing additive can significantly enhance the compressive strength of Lytag pellets, reduce its water absorption at 24h and improve pore-shape of inner structure. The firing coefficient (Pk) kept a good linear relationship with porosity and strength of Lytag particles.


Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00