Browse > Article
http://dx.doi.org/10.14481/jkges.2016.17.12.35

Long-Term Compressive Strength and Durability Properties of "CSG" Materials by Freezing-Thawing Test  

Jin, Guangri (Department of Civil Engineering, Yanbian University)
Kim, Kiyoung (K-water Institute, Infrastructure Research Center)
Moon, Hongduk (Department of Civil Engineering, Gyeongnam National University of Science and Technology)
Quan, Hechun (Department of Civil Engineering, Yanbian University)
Publication Information
Journal of the Korean GEO-environmental Society / v.17, no.12, 2016 , pp. 35-43 More about this Journal
Abstract
With the development of construction technology, constructions of dam and levee (dike) as well as the environmental problems are becoming issues. Recently, many countries have tried to develop and used CSG (Cemented Sand and Gravel), which needs fewer requirements than others in aggregates, constructability and ground condition during the dam construction. Mixing up with small amount of cement, CSG is able to increase the strength and proceed accelerated construction without artificial gradation adjustment of riverbed aggregate and crushed rock on construction site. Thus, CSG can minimize environmental damage resulted from quarries mining and reduce cost of construction. Unlike heat of hydration condition that regular concrete usually met, CSG exposes to repeated dry-wet and freezing and thawing environment. Thus, consider the importance of structure of dam or levee, intensive study on the durability of CSG is needed. In this study, freezing and thawing experiment was carried out to evaluate the durability of CSG. In results, the durability factor of CSG is 30~40 or >40 when the amount of cement is $0.4{\sim}0.6kN/m^3$ or $0.8{\sim}1.0kN/m^3$, respectively. The unconfined compressive strength is reduced to 30~50% or 40~70% when the amount of cement is $0.4{\sim}0.6kN/m^3$ or $0.8{\sim}1.0kN/m^3$, respectively. Taken together, the strength and durability of CSG is reliable when the amount of cement is over $0.8kN/m^3$.
Keywords
CSG; Freezing and thawing; Durability; Compression strength;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Londe, P. and Lino, M. (1992), The faced symmetrical hardfill dam: a new concept for RCC, International Water Power & Dam Construction, February, 44(2), pp. 19-24.
2 Raphael, J. M. (1992), The optimum gravity dam, Proceedings Roller Compacted Concrete III, ASCE, San Diego, California, pp. 5-19.
3 Tadahiko., Fujisawa. and Hideaki K. (2002), Study on strength and physical properties of cemented materials for CSG design, Report, JAPAN: Hydraulic Research Engineering Group, Public Works Research Institute.
4 Jin, G. R., Kim, K. Y., Quan, H. C. and Kim, K. W. (2013), The strength characteristics of PVA fiber reinforced CSG materials, Journal of The Korean Geotechnical Society, Vol. 29, No. 12, pp. 95-104 (in Korean).   DOI
5 Kim, K. Y. (2009), Stability verification and test construction of CSG weir using hardfill material, Korean Society of Civil Engineers 35th Conference, pp. 2002-2006 (in Korean).
6 Kim, K. Y., Jin, G. R., Shin, D. H. and Lee, J. W. (2011), Freezing and thawing durability properties of cemented sand and gravel, 2011 Korean Geo-Environmental Society Fall Conference, pp. 369-372 (in Korean).