Evaluation of reactive powder concrete used as a retrofitting material for concrete members

Title: Evaluation of reactive powder concrete used as a retrofitting material for concrete members
Author(s): Ta-Peng Chang, Bo-Tsun Chen, Chao-Lung Hwang, Jeng-Ywan Shih, Chung-Sheng Wu
Paper category : conference
Book title: 2nd International RILEM Symposium on Advances in Concrete through Science and Engineering
Editor(s): J. Marchand, B. Bissonnette, R. Gagné, M. Jolin and F. Paradis
Print-ISBN: 2-35158-003-6
e-ISBN: 2351580028
Publisher: RILEM Publications SARL
Publication year: 2006
Nb references: 10
Language: English

Abstract: In this study, the performance of reactive powder concrete (RPC) used as a retrofitting material is evaluated by the ultimate compressive strengths and flexural strengths (moduli of rupture) of the resulting composite concrete specimens. Experimental results show that flows of fresh RPC are between 155 to 205%. Typical average compressive strength of RPC cylinder increases from 110.7 MPa at age of 7 days to 157.9 MPa at 28 days with moist-curing and no applied pressure. When the cylindrical concrete specimens were wrapped with 10 and 20 mm thicknesses of RPC layers, the average increases of compressive strengths for such composite concrete members are 28.7% and 40.0%, respectively. For beam concrete specimen retrofitted by the RPC plates of 10 and 20 mm thickness, respectively, the increase of moduli of rupture are 89.2% and 121%, respectively. More significant strengthening effects of RPC retrofit on the flexural behavior than those on compressive behavior are observed.

Keywords: Reactive powder concrete (RPC), retrofit, CFRP

Online publication: 2006-08-02
Classification: 3.3 Theme 3: Monitoring, Repair and Maintenance of Concrete Structures
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580028.089