Early-age internal stress development in restrained rubber included concrete slab

Title: Early-age internal stress development in restrained rubber included concrete slab
Author(s): Y.M. Zhang, L.Y. Wang, Q. Bi, J.Y. Wang
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 1011 - 1018
Total Pages: 8
Nb references: 8
Language: English

Abstract: Rubber included cement concrete has been found to have better performance in cracking resistance, frost resistance, toughness etc than ordinary cement concrete. However, seldom research has been conducted to reveal the effect of rubber particles on the stress involvement of cement concrete. The current investigation aims to compare the internal stress involvement of restrained rubber included cement concrete and ordinary cement concrete at early ages. A new method using strain gauge stick to the surface of soft rubber piece was used to monitor the strain development of rubber piece inside concrete, and then the strain was transferred to stress of concrete. Four slabs were cast, two of them were cured under controlled indoor environment and two were cured outdoor. Results show that the internal stress developed in restrained rubber included concrete was lower than that in ordinary cement concrete, though the free dry shrinkage of the former was higher than that of the latter. The stress relaxation effect due to the low elastic modulus of rubber included concrete may account for this result.

Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00