The use of residues of civil construction and ashes from sugar cane bagasse for the production of finishing mortar

Abstract

The reuse of civil construction wastes (CCW ) and sugar cane bagasse (CCB) for the production of finishing mortar to replace totally small aggregates (natural sand), at different percentages, is investigated. In fact, their adequate disposal diminishes the extraction and use of sand as aggregate. Mortar was compared with the characteristics derived from a compound made of cement and sand. Finishing mortar was produced and totally replaced the small aggregates in five different compositions: 100% CCB; 75% CCB and 25% CCW; 50% CCB and 50% CCW; 25% CCB and 75% CCW and 100% CCW. Result of assay with fresh and hardened mortar revealed the feasibility of employing this material. Mechanical performance was improved and water retention was maintained and, consequently, a sustainable contribution. Treatment 75% CCW and 25% CCB provided the best resistance for traction and compression.