American Society of Civil Engineers


Evaluations of Latex Modified Concrete Overlay Bonded to Normal Concrete Deck


by S. Konduru, (Digioia Gray and Associates, 570 Beatty Rd, Monroeville, PA 15140 E-mail: skonduru@digioiagray.com), I. Ray, (Department of Civil and Environmental Engineering, West Virginia University, P.O. BOX 6103, Morgantown, WV 26505-6103 E-mail: an.chen@mail.wvu.edu), J. F. Davalos, (Department of Civil and Environmental Engineering, West Virginia University, P.O. BOX 6103, Morgantown, WV 26505-6103 E-mail: an.chen@mail.wvu.edu), and A. Chen, (Department of Civil and Environmental Engineering, West Virginia University, P.O. BOX 6103, Morgantown, WV 26505-6103 E-mail: an.chen@mail.wvu.edu)
Section: Symposium 2: Advanced Materials for Sustainable Development, pp. 499-508, (doi:  http://dx.doi.org/10.1061/41096(366)51)

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Document type: Conference Proceeding Paper
Part of: Earth and Space 2010: Engineering, Science, Construction, and Operations in Challenging Environments
Abstract: Latex modified concrete (LMC) overlays are placed over normal concrete substrates to increase the life of bridge decks. However, the property mismatch between these two concrete types gives rise to interfacial stresses that cause premature delaminations, corner lifting, and cracking. No systematic studies are available to properly evaluate the placement process and failure mode of LMC overlays at prototype scale. This study measures and evaluates the bond-strength, displacements, and delaminations of the interface during the entire placement and curing process. The findings will be used for full-scale studies and developing performance based specifications to eliminate or reduce the potential interface failures.


ASCE Subject Headings:
Concrete
Bonding
Bridge decks