Influence of type of aggregate and surface roughness on the interface fracture properties

Title: Influence of type of aggregate and surface roughness on the interface fracture properties
Author(s): G. Appa Rao, B. K. Raghu Prasad
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 37
Issue: 269
Issue date: 2004-06-01
Publication year: 2004
Pages: 328 - 334
Total Pages: 7
Nb references: 15
Language: English

Abstract: An experimental investigation of interface fracture in high strength concrete is reported.
An attempt has been made to study the influence of strength of mortar, type of aggregate and its roughness on interface fracture properties.
The parameters include load-CMOD variations, tensile strength, and fracture energy of the interface.
Stiffness, compliance and ductility factors of the composite specimens have been evaluated in Mode-I loading.
The fracture energy increases as the roughness of the aggregate surface increases.
The stiffness of the composite specimen increases as the roughness of the aggregate surface increases.
The ductility factor (i.
e.
the fracture energy per unit of peak load) decreases as the surface area of the interface increases in sandwiched composite specimens in Mode-I failure, whereas it increases with the interface area in composite specimens with mortar cast against rough concrete aggregates.
The interface exhibits brittle behavior with catastrophic failure indicating the application of LEFM to the interface.

Online publication: 2004-04-27
Classification: Technical Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13658