Materiales de Construcción, Vol 64, No 316 (2014)

Lime mud from cellulose industry as raw material in cement mortars


https://doi.org/10.3989/mc.2014.00214

R. C.E. Modolo
University of Aveiro/CICECO, Portugal

L. Senff
Center of Mobility Engineering (CEM), Federal University of Santa Catarina (UFSC), Brazil

J. A. Labrincha
University of Aveiro/CICECO, Portugal

V. M. Ferreira
University of Aveiro/CICECO, Portugal

L. A.C. Tarelho
University of Aveiro/CESAM, Portugal

Abstract


This study reports the use of lime mud (LM) in cement-based-mortars. Lime mud is a waste generated in the production of cellulose by the kraft mill process. It is mainly composed of CaCO3, a small amount of magnesium carbonate and other trace minerals. Mortars were prepared by adding different amounts of LM (10, 20 and 30% by weight of cement) in dry weight. The mortar compositions were evaluated through rheology and flow table measurements, assuring that all the samples exhibited adequate conditions for testing in both equipments. The hardened state properties were also evaluated through mechanical strengths at 7, 28 and 90 days of curing. Following a waste management solution perspective, this work intend to provide a general evaluation of LM application in cement based mortars, looking at both fresh and hardened properties in order to guarantee that the final application requirements are not hindered.

Keywords


Mortars; Lime mud; Characterization; Valorization

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References


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