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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.11 No.1
- 발행연도
- 2017.3
- 수록면
- 85 - 97 (13page)
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초록· 키워드
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Research has suggested that conventional lightweight concrete can offer durability advantages due to reduced cracking tendency. Although a number of publications exist providing the results of laboratory-based studies on the durability performance of lightweight concrete (with lightweight coarse aggregate) and internally cured concrete (using prewetted lightweight fine aggregate), far fewer field studies of durability performance of conventional lightweight concrete bridge decks in service have been performed. This study was commissioned to provide insight to a highway agency on whether enhanced durability performance, and therefore reduced maintenance and longer lifecycles, could be anticipated from existing lightweight concrete bridge decks that were not intentionally internally cured. To facilitate performance comparison, each lightweight bridge deck selected for inclusion in this study was paired with a companion normalweight bridge deck on a bridge of similar structural type, deck thickness, and geometric configuration, with similar age, traffic, and environmental exposure. The field-observed cracking of the decks was recorded and evaluated, and crack densities for transverse, longitudinal, and pattern cracking of the normalweight and lightweight deck in each pair were compared. Although some trends linking crack prevalence to geographic location, traffic, and age were observed, a distinct difference between the cracking present in the paired lightweight and normalweight bridge decks included in this study was not readily evident. Statistical analysis using analysis of covariance (ANCOVA) to adjust for age and traffic influence did not indicate that the type of concrete deck (lightweight or normalweight) is a statistically significant factor in the observed cracking. Therefore, for these service environments, lightweight decks did not consistently demonstrate reduced cracking.
목차
Abstract
1. Introduction
2. Background Information on Cracking in Bridge Decks
3. Research Significance and Objectives
4. Experimental Program
5. Results and Analysis
6. Conclusions and Discussion
References
참고문헌 (41)
참고문헌 신청
American Concrete Institute (ACI). (2008). Guide for conducting a visual inspection of concrete in service. ACI Committee Report 201.1R-08.
Barrett T. J., Miller, A., & Weiss, J. (2013). Documentation of the INDOT experience and construction of the bridge decks containing internal curing in 2013. Technical Report SPR 3752. Joint Transportation Research Program, Indiana Department of Transportation and Purdue University, West Lafayette, IN.
Bentur, A., Igarashi, S.-I., & Kovler, K. (2001). Prevention of autogenous shrinkage in high strength concrete by internal curing using wet lightweight aggregates. Cement and Concrete Research, 31(11), 1587?1591.
Bentz D. P., & Weiss W. J. (2011). Internal curing: A 2010 stateof- the-art review. National Institute of Standards and Technology Report NISTIR 7765.
Cady, P. D., & Carrier, R. E. (1971). Final report on durability of bridge deck concrete: Part 1: Effect of construction practice on durability. PennDOT Contract No. 31057-H. University Park, PA: Pennsylvania State University.
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