Study of the fracture behavior of mortar and concretes with crushed rock or pebble aggregates

Autor(es)

Ribeiro, Sebastiao ^[1] ; Ribeiro, Diego de Campos ^[1] ; de Souza Dias, Mateus Botani ^[1] ; Ribeiro Garcia, Giseli Cristina ^[1] ; Bento dos Santos, Esoly Madeleine ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Mat Engn DEMAR, Lorena Sch Engn EEL, BR-12600970 Lorena, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 14, n. 1, p. 46-52, JAN-MAR 2011.
• Citações Web of Science: 5

Resumo

The objective of this work was to compare the fracture energy of mortar and concretes produced with crushed rock and pebble aggregates using zero, 10, 20, 30 and 40% of aggregates mixed with standard mortar and applying the wedge splitting method to achieve stable crack propagation. The samples were cast in a special mold and cured for 28 days, after which they were subjected to crack propagation tests by the wedge splitting method to determine the fracture energies of the mortar and concrete. The concretes showed higher fracture energy than the mortar, and the concretes containing crushed rock showed higher resistance to crack propagation than all the compositions containing pebbles. The fracture energy varied from 38 to 55 J.m-2. A comparison of the number of aggregates that separated from the two concrete matrices with the highest fracture energies indicated that the concrete containing pebbles crumbled more easily and was therefore less resistant to crack propagation. (AU)

• Processo FAPESP: 07/55964-3 - Implantação e aperfeiçoamento da técnica de propagação estável de trinca pelo método da cunha (wedge splitting) no DEMAR/ EEL/ USP, para medida de energia de fratura em concretos
• Beneficiário: Sebastião Ribeiro
• Modalidade de apoio: Auxílio à Pesquisa - Regular