Long-Term Durability of Roller-Compacted Concrete Pavement
Roller-compacted concrete pavement (RCCP), an environmental friendly pavement of which load carry capacity benefitted from both hydration and aggregate interlock from roller compacting, demonstrated a superb structural performance for a relatively small amount of water and cement content. Even though an excellent structural performance can be secured, it is required to investigate roller-compacted concrete (RCC) under environmental loading and its long-term durability under critical conditions. In order to secure long-term durability, an appropriate internal air-void structure is required for this concrete. In this study, a method for improving the long-term durability of RCCP is suggested by analyzing the internal air-void structure and corresponding durability of RCC. The method of improving the long-term durability involves measurements of air content, air voids, and air-spacing factors in RCC that experiences changes in terms of type of air-entraining agent and its usage amount. This test is conducted according to the testing criteria in ASTM C 457, 672, and KS F 2456. It was found that the freezing-thawing and scaling resistances of RCC without any chemical admixture was quite low. Interestingly, an improvement of freezing-thawing and scaling resistances was observed for RCC with appropriate the air entraining (AE) agent content; Relative dynamic elastic modulus was found to be more than 80% for those mixtures. In RCC with AE agent mixtures, large amount of air was distributed within a range of 2% to 3%, and an air void spacing factor ranging between 200 and 300 μm (close to 250 μm, recommended by PCA) was secured. The long-term durability of RCC has a direct relationship with air-void spacing factor, and thus it can only be secured by ensuring the air void spacing factor through the inclusion of the AE in the mixture.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1339812Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 698
 KS F 2456, Standard test method for resistance of concrete to rapid freezing and thawing.
 ASTM C672, Standard Test Method for Scaling Resistance of Concrete Surfaces Exposed to Deicing Chemicals.
 ASTM C457, Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete.
 ASTM C1170, Standard Test Method for Determining Consistency and Density of Roller-Compacted Concrete Using a Vibrating Table.
 Richard Pleau, Michel Pigeon, Jean-Luc Laurencot, 2001, Some Findings of the Usefulness of Image Analysis for Determining the Characteristics of Air-Void System on hardened Concrete, Cement & Concrete Composites 23, pp. 237-246.
 Luhr, D. R., 2006, Frost Durability of Roller-Compacted Concrete Pavements, Portland Cement Association.
 Dale Harrington et al., 2010, Guide for Roller Compacted Concrete Pavements, National CP Tech Center.
 ACI 325.10R-25, Report on Roller Compacted Concrete pavements. Farshid Vahedifard., Mahmoud Nili., Christopher L. Meehan., 2010, Assessing the effects of supplementary cementitious materials on the performance of low-cement roller compacted concrete pavement, Construction and Building Materials, Vol. 24, No. 12, pp. 2528~2535.
 Yun, K. K., Jeong, W. K., Jun, I. K., and Lee, B. H., 2004, Analysis of Air Voids System Using Image Analysis Technique in Hardened Concrete, Journal of the Korean Concrete Institute, Vol. 16, No. 6. pp. 740~750.
 Han, H. S., and Jin, Y. M., 2009, The Future of Concrete Admixture Industry for Low Carbon, Green Growth, Journal of the Korean Concrete Institute, Vol. 21, No. 4, pp. 41~43.
 Hwang, H. J., and Kim, J. G., 2010, Evaluation of Chloride Attack Resistibility of Concrete Damaged Due to Freezing-Thawing, Master's Thesis, Dong-Eui University.
 Lee, C. H., Kim, Y. K., Kang, J. G., Park, C. W., and Lee, S. W., 2011, A Study on Construction Methods of Roller Compacted Concrete Pavement for Bike Roads, Journal of the Korean Society of Road Engineers, Vol. 13, No. 2 pp. 103~114.
 Song, S. H., and Lee, S. W., 2015, A Study on the Gradation Effect of the Property of Roller Compacted Concrete Pavement, Journal of the Korean Society of Road Engineers, Vol. 17, No. 3 pp. 49~58.