resumo
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.
palavras-chave
PORTLAND-CEMENT; WASTE MANAGEMENT; BOTTOM ASH; FLY-ASH; CONCRETE; SLUDGE; STRENGTH; FILLERS; WATER
categoria
Construction & Building Technology; Materials Science
autores
Modolo, RCE; Senff, L; Labrincha, JA; Ferreira, VM; Tarelho, LAC
nossos autores
João António Labrincha Baptista
Professor Catedrático
Regina Célia Espinosa Modolo
Estudante de doutoramento
Victor Miguel Carneiro de Sousa Ferreira
Professor associadoagradecimentos
The authors would like to thank RAIZ and Portucel Soporcel group for their valuable help and contribution in this work. The authors also acknowledge FCT - Fundacao para a Ciencia e Tecnologia (grant SRFH/BD/75182/2010) for financial support for this work.