DBPapers
DOI: 10.5593/SGEM2014/B42/S18.014

INFLUENCE OF GYPSUM-BASED CEMENTITIOUS MATERIALS ON THE EARLY AGE STRENGTH CHARACTERISTICS OF MORTARS

I. O. Toma, M. Budescu, A. M. Toma, C. Pastia, S. G. Luca
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-16-2 / ISSN 1314-2704, June 19-25, 2014, Book 4, Vol. 2, 103-110 pp

ABSTRACT
Concrete is a mixture between two main components: cement paste and aggregates.
While the aggregates and the water can be easily found in nature, cement needs special processing plants to be produced. Taking into account that the concrete industry is the largest consumer of natural resources in the world, one could only imagine the environmental burden it creates. The present paper brings its contribution to the investigation on the use of a new binder as partial or total replacement of the ordinary Portland cement in concrete. The anhydrous calcium sulphate based binder is obtained exclusively from industrial wastes and can be entirely recycled after its expiration date. The obtained results show a decrease in the flexural and compressive strengths of mortars with small replacing percentages of anhydrous calcium sulphate compared to the reference sample made with Portland cement. However, the flexural strength increases tremendously for higher percentages of anhydrous calcium sulphate.

Keywords: eco-material, anhydrous calcium sulphate, cement replacement, mechanical properties

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