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Advances in Civil Engineering - Volume 2014 2014, Article ID 103421, 10 pages -

Research Article

Department of Civil and Environmental Engineering, The Pennsylvania State University, 3127 Research Drive, State College, PA 16801, USA

Department of Civil and Environmental Engineering, The Pennsylvania State University, 231M Sackett Building, University Park, PA 16802, USA

Department of Civil and Environmental Engineering, The Pennsylvania State University, 231J Sackett Building, University Park, PA 16802, USA

Department of Civil and Environmental Engineering, The Pennsylvania State University, 231D Sackett Building, University Park, PA 16802, USA

Received 7 October 2013; Revised 6 February 2014; Accepted 11 February 2014; Published 17 March 2014

Academic Editor: Andreas Kappos

Copyright © 2014 Jared R. Wright et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Cracking of newly placed binary Portland cement-slag concrete adjacent to bridge deck expansion dam replacements has been observed on several newly rehabilitated sections of bridge decks. This paper investigates the causes of cracking by assessing the concrete mixtures specified for bridge deck rehabilitation projects, as well as reviewing the structural design of decks and the construction and curing methods implemented by the contractors. The work consists of 1 a comprehensive literature review of the causes of cracking on bridge decks, 2 a review of previous bridge deck rehabilitation projects that experienced early-age cracking along with construction observations of active deck rehabilitation projects, and 3 an experimental evaluation of the two most commonly used bridge deck concrete mixtures. Based on the literature review, the causes of concrete bridge deck cracking can be classified into three categories: concrete material properties, construction practices, and structural design factors. The most likely causes of the observed early-age cracking were found to be inadequate curing and failure to properly eliminate the risk of plastic shrinkage cracking. These results underscore the significance of proper moist curing methods for concrete bridge decks, including repair sections. This document also provides a blueprint for future researchers to investigate early-age cracking of concrete structures.





Autor: Jared R. Wright, Farshad Rajabipour, Jeffrey A. Laman, and Aleksandra Radlińska

Fuente: https://www.hindawi.com/



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