Affiliation:
1. State Key Laboratory of Solid Waste Reuse for Building Materials
Abstract
Massive coal gangue waste delivers environmental disasters in China. Finding an effective, efficient, practical and value-added approach for large-scale disposal of coal gangue waste is very urgent. In this study, thermal treatment approach was conducted on coal gangue waster with the goal to improve its pozzolanic activity so that considerable replacement of Portland cement can be realized. XRD analysis, IR analysis as well as the evaluation on mechanical properties of mortar specimen were carried out to optimize thermal treatment program. The results indicate that coal gangue waste can be efficiently treated at 850°C in less than 30min to obtain pozzolanic activity of 108% at 7 days and 124% at 28 days. And an industrial product also shows similar improvement in pozzolanic activity to the lab results, and indicates the potential for producing eco-efficient cementitious materials.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference26 articles.
1. V.I. Babushkin, G.M. Matveyev, O.P. Mchedlov-Petrossyan, Thermo-dynamics of Silicates, ISBN 3-540-12750-X.
2. Caldarone M.A., Gruber K.A., Burg R.G., a High-Reactivity Metakaolin: A New Generation Mineral Admixture, Concrete International. Pages 37-40 (November 1994).
3. Frias M., Sanchez de Rojas M.J.: Mater. de Constr. 50, 57 (2000).
4. SchvarzmanA., Kovler K., Grader G.S., Shter D.E., The effect of dehydroxylation and amorphization degree on pozzolanic activity of kaolinite, Cem. Concr. Res. Volume 33, Issue 3 Pages 299-462 (March 2003).
5. Sabir B.B., Wild S., Bai J., Metakaolin and calcined clays as pozzolans for concrete: a review, Cem. Concr. Compos. 23, 441 (2001).
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献