Experimental study to estimate thermal stress caused by heat of cement hydration in massive concrete structures

Title: Experimental study to estimate thermal stress caused by heat of cement
hydration in massive concrete structures
Author(s): Toshiaki Mizobuchi, Yasuro Maki, Ryousuke Inoue
Paper category : conference
Book title: 2nd International Symposium on Service Life Design for Infrastructures
Editor(s): K. van Breugel, Guang Ye, Yong Yuan
Print-ISBN: 978-2-35158-096-7
e-ISBN: 978-2-35158-097-4
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 733 - 740
Total Pages: 8
Nb references: 5
Language: English

Abstract: Thermal cracking may occur due to many factors such as size, shape, concrete placement period, material, mix proportion and environmental conditions of the structure being constructed.Therefore, it is necessary to determine various conditions in order to predict thermal cracking caused by heat of hydration of cement. For example, an analytical model should be made on the basis of shape of constructed structure and ground conditions and it is necessary to determine conditions of thermal and mechanical properties for the analysis from used materials and mix proportion. In addition, the boundary conditions shall be determined on the basis of environmental condition of the construction area, types of the mould, time from placement until stripping, and curing method. It becomes possible that thermal stress analysis is carried out by determining these conditions at last.
In this report, the convenient test for evaluating thermal and mechanical properties of concrete considering temperature dependency using the thermal insulation container, direct tensile test and the test for estimating the limit to generating of cracking using Thermal Stress Testing Machine (TSTM) were proposed to bring thermal and mechanical properties by which the results in prediction analysis of expansion and shrinkage with temperature change of concrete were affected more close by properties with existing structures.

Online publication: 2011-04-20
Publication type : full_text
Public price (Euros): 0.00