Study on Stimulating the Cementitious Activity of Waste Slate Powder

Title: Study on Stimulating the Cementitious Activity of Waste Slate Powder
Author(s): Mingli CAO, Hang YAO
Paper category : conference
Book title: 2nd International Conference on Waste Engineering and Management - ICWEM 2010
Editor(s): J.Zh. Xiao, Y. Zhang, M.S. Cheung and Reuben P. K. Chu
Print-ISBN: 978-2-35158-102-5
e-ISBN: 978-2-35158-103-2
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 253 - 260
Total Pages: 8
Nb references: 10
Language: English

Abstract: The waste slate powder was used as the active admixture to replace part of cement in the experiment. The cementitious activity of waste slate powder in the system of slate powdercement was discussed and the effect of calcination and chemical activators on the cementitious activity of slate powder was also analyzed. Results show that the waste slate powder has a low cementitious activity at early days and when the replacement ratio is 10%, the compressive strength of 28d is close to that of pure cement paste; the cementitious activity of slate powder was not improved significantly through calcination; when the content of chemical activators Na2SO4 and NaOH is 1%~5% and 0.5% respectively, the early compressive strength of slate powder-cement paste is improved and the effect of CaSO4·2H2O and Ca(OH)2 on stimulating the activity of slate powder is not ideal.

Online publication: 2011-01-25
Publication type : full_text
Public price (Euros): 0.00