Experimental identification of Biot's hydro-mechanical coupling coefficient for cement mortar

Title: Experimental identification of Biot's hydro-mechanical coupling coefficient for cement mortar
Author(s): W. Obeid, G. Mounajed, A. Alliche
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 35
Issue: 248
Issue date: 2002-05-01
Publication year: 2002
Pages: 229 - 236
Total Pages: 8
Nb references: 19
Language: English

Abstract: A new experimental approach that allows separation of the components of the Pickett effect due to surface microcracking and stress-induced shrinkage is developed and demonstrated for early age concrete subjected to tensile loads induced in restrained shrinkage tests.
The experiment measures creep of three concrete materials subjected to same loads,but under different environments:moistcover,sealed,and drying conditions.
The key features of the experiment are the suppression of shrinkage in the moist-cover test,and the uniform internal drying in the sealed test.
The results confirm that the Pickett effect in tension has two sources:stress-induced shrinkage and microcracking.
The new approach provides insight to creep,shrinkage,softening,and cracking behaviors under tensile load,and explains behavioral diferences between plain and fiber reinforced concrete.

Online publication: 2002-03-27
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13728