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http://dx.doi.org/10.7843/kgs.2015.31.12.29

Engineering Characteristics of Cement Milk for Bored Piles  

Do, Jong-Nam (Korea Expressway Corporation Research Institute)
Nam, Moon-Seok (Korea Expressway Corporation Research Institute)
Shim, Jae-Won (Korea Expressway Corporation Research Institute)
Park, Young-Ho (Korea Expressway Corporation Research Institute)
Lee, Seung-Jun (Korea Expressway Corporation Research Institute)
Publication Information
Journal of the Korean Geotechnical Society / v.31, no.12, 2015 , pp. 29-43 More about this Journal
Abstract
In this study, engineering property tests were conducted for cement milk used as a filling materials in the bored piles method. For this purpose, various water/cement ratio specimens were produced on the basis of standard specimen specified in highway corporation specifications. The unconfined compressive strength, point load strength, elasticity modulus, poisson's ratio test was performed according to the age. As a test result, injection height for productions of cement milk specimens was defined ratios. Correlation coefficient K of the unconfined compressive strength and point load strength were $K_7=4.55{\sim}13.65$ in age 7 days, and $K_{28}=5.28{\sim}16.84$ in age 28 days. When water / cement ratio is 65-150%, the elastic modulus and Poisson's ratio significantly increased and decreased regardless of age. In addition, the formulae were proposed for unconfined compressive strength, point load strength, a correlation coefficient of unconfined compressive strength, point load strength, elastic modulus, and poisson's ratio for each age.
Keywords
Bored piles; Injection materials; Water/cement ratio; Cement milk; Unconfined compressive strength; Point load strength; Elasticity modulus; Poisson's ratio; Correlation coefficient;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 ASTM (1995), "Static Modulus of Elasticity and Poisson's Ratio of Concrete in Compression", C 469, American Society for Testing and Materials, Philadelphia, Pennsylvania.
2 ASTM (1995), "Test Method for Determination of the Point Load Strength Index of Rock", D 5731-95, Vol.04.08, American Society for Testing and Materials, Philadelphia, Pennsylvania.
3 Vallejo LE, Walsh RA, and Robinson MK (1989), "Correlation Between Unconfined Compressive and Point Load Strength for Appalachian Rocks", Proceeding of the 30th U.S. Symposium on Rock Mechanics, pp.461-468.
4 Carter PG and Snedden M (1977), "Comparison of Schmidt Hammer, Point Load and Unconfined Compression Tests in Carboniferous Strata", Proceeding of a Conference on Rock Engineering, University of New Castle, Tyne, England, pp.197-210.
5 ASTM (1995), "Test Method for Unconfined Compressive Strength of Intact Rock Core Specimens", D 2938-95, Vol.04.08, American Society for Testing and Materials, Philadelphia, Pennsylvania.
6 Bieniawski ZT (1975), "The Point Load Test in Geotechnical Practice", Eng. Geol., Sept., pp.1-11.
7 Broch E and Franklin JA (1972), "The Point Load Strength Test", Intional Journal of Rock Mechanics, Min. Sci 9, pp.669-697.   DOI
8 Das BM (1985), "Evaluation of the Point Load Strength for Soft Rock Classification", Proceeding of the 4th International Conference on Ground Control in Mining, Morgantown, WV, pp.220-226.
9 Duff A. Abrams (1918), "Design of Concrete Mixtures", Structrural Materials Research Laboratory Lewis Institute, Chicago, pp.3-5.
10 Hawkins, A. B. and Olver, J. A. G. (1986), "Point Load Test : Correlation Factors and Contractual use an Example from the Corallian at Weymouth", Geological Society Publication, No.2, pp.269-271.
11 Hong, W. P., Lee, J. H., and Chae, S. K. (2008), "Bearing Capacity of SDA Augered Piles in Various Grounds Depending on Water-Cement Ratio of Cement Milk", Journal of Korean Geotechnical Society, Vol.24, No.5, pp.37-54.
12 Japan Concrete Piles Construction Technology Association (2002), "Strength Test Method of Side Fixing Materials and Tip Fixing Materials for Bored Piles", Japan Concrete Piles Construction Technology Association, pp.1-8.
13 Korea Expressway Corporation (2012), "Standard Specifications for Highway Construction", Civil Engineering, Korea Expressway Corporation, pp.6-19-6-20
14 Japan Geotechnical Engineering Association (1983), "From Foundation Investigation and Design to the Construction-The Soil and Foundation Series", Sammi Printing Co. Ltd., Tokyo, pp.407-453.
15 Jermy CA and Bell FG (1991), "Coal Bearing Strata and the Stability of Coal Mines in South Africa", Proceedings of the 7th Intl. Cong. on Rock Mech. Intl. Soc. Rock Mech., Aachen, Germany, pp.1125-1131.
16 Jung, H. S., Lim, H. S., and Kim, J. S. (2003), "Suggestion of Evaluation Formula for Skin Resistance of SIP", Journal of Korean Geo-Environmental Society, Vol.4, No.1, pp.59-66.
17 Lee, S., Park, J. H., Park, J. B., and Kim, T. H. (2002), "A Study on the Characteristics of Bearing Capacity for SIP Piles in Domestic Areas", Journal of Korean Geotechnical Society, Vol.18, No.4, pp.319-327.
18 Lim, H. S., Park, Y. B., and Park, J. B. (2002), "Investigation of Characteristics and Suggestion of Evaluation Formulae for Skin Resistance of SIP", Journal of Korean Geo-Environmental Society, Vol.3, No.2, pp.15-21.
19 O'Rourke JE (1988), "Rock Index Properties for Geoengineering Design in Underground Development", SME preprint, pp.88-48.
20 Ministry of Land, Infrastructure and Transport (2012), "Criteria of Concrete Structures", Ministry of Land, Infrastructure and Transport, p.63.
21 Park, J. B. (2004), "A Study on Strength and Friction Behavior of Cement Paste for Auger Cast Pile", Journal of Korean Geo-Environmental Society, Vol.5, No.3, pp.31-39.
22 Pells, P.J. N. (1975), "The Use of the Point Load Test in Predicting the Compressive Strength of Rock Materials", Australian Geomechanical Journal, G5, pp.54-56.
23 Park, J. B., Kim, J. S., Lim, H. S. (2004), "Study on the Bearing Capacity Evaluation of Pile Constructed by Enhanced SIP Criteria", Journal of Korean Geo-Environmental Society, Vol.5, No.3, pp.5-15.
24 Park, Y. H. (2004), "A Study of Design and Construction of SIP Method", Korea Expressway Corporation Research Institute, pp. 138-152, pp.347-365.
25 Park, Y. H., Kim, S. H., Kim, N. Y., and Yook, J. H. (2009), "Practical Foundation Engineering and Jointless Bridge", Construction Guide, pp.373-472.
26 Read JRL, Thornton PN, and Regan WM (1980), "A Regional Approach to the Point Load Test", Proceeding of the Aust-NZ Geomech. Conference 2, pp.35-39.
27 Rusnak JA (1998), "Application of the Coal Mine Roof Rating, Derived from Drill Core, In the Roof Support Design of a Coal Belt Conveyor Tunnel", Proc. of the 17th International Conference on Ground Control in Mining, Morgantown, WV, pp.221-230.
28 Shin, B. W. and Lee, J. D. (2000), "Field Model Test on Uplift Capacity of Bored Pile in Weathered Granite Soil", Journal of Korea Society of Civil Engineers, Vol.20, No.5-C, pp.441-451.
29 Singh VK and Singh DP (1993), "Correlation Between Point Load Index and Compressive Strength for Quartzite Rocks", Geotechnical and Geological Engineering, 11, pp.269-272.   DOI
30 Smith HJ (1997), "The Point Load Test for Weak Rock in Dredging Applications", International Journal of Rock Mechanics, Min. Sci 34, No. 3-4, Paper No. 295.