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

Materials Research

Sebastião Ribeiro¹  Diego De Campos Ribeiro¹  Mateus Botani De Souza Dias¹  Giseli Cristina Ribeiro Garcia¹  Ésoly Madeleine Bento Dos Santos¹ 

[1] ,University of São Paulo Lorena School of Engineering Department of Materials EngineeringLorena SP ,Brazil

关键词: portland cement;    mortar;    concrete;    crushed rock;    pebbles;   

DOI  :  10.1590/S1516-14392011005000004

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
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