Open AccessComparison of Analytical Methods for Estimation of Early-Age Thermal-Shrinkage Stresses in RC Walls
Author(s) -
Barbara Klemczak,
A. Knoppik-Wróbel
Publication year - 2013
Publication title -
archives of civil engineering
Language(s) - English
Resource type - Journals
eISSN - 2300-3103
pISSN - 1230-2945
DOI - 10.2478/ace-2013-0004
Subject(s) - cracking , shrinkage , durability , structural engineering , reinforced concrete , materials science , geotechnical engineering , foundation (evidence) , forensic engineering , engineering , composite material , archaeology , history
The volume changes caused by coupled temperature and moisture variations in early-age concrete elements lead to formation of stresses. If a restraint exists along the contact surface of mature concrete against which a new concrete element has been cast, generated stresses are mostly of a restraint origin. In engineering practice a wide range of externally restrained concrete elements can be distinguished such as tank walls or bridge abutments cast against an old set foundation, in which early-age cracking may endanger their durability or functionality. Therefore, for years methods were being developed to predict early-age stresses and cracking risk of externally restrained concrete elements subjected to early-age thermal-moisture effects. The paper presents the comparative study of the most recognised analytical approaches: the method proposed in EC2, the method proposed by ACI Committee 207 and the method developed at the Luleå University of Technology.