Influence of Curing Pressure on Unconfined Compressive Strength of Cemented Clay

Abstract:

The soil-cement columns are generally installed and cured in the soft clay layers under confining pressure. The strength of the soil-cement columns may be influenced by confining pressure during curing period. In this study, the main objective was to study the influence of curing pressure on unconfined compressive strength of cemented clay. A series of unconfined compression tests was performed on a cement admixed clay sample cured under pressure values of 0 kPa (atmospheric pressure), 25kPa, 50kPa and 100 kPa using a typical unconfined compression equipment. The test samples with values of cement content of 0.5, 1.0 and 2.0 percent were cured for 28 days.The stress-strain curves obtained from all tests show a peak value of stress. The unconfined compressive strength or peak stress obviously increased with increasing cement content for all curing pressure conditions. It can be observed that the strength of samples gradually increased with curing pressure for cement content of 0.5 percent. For cement contents of 1.0 and 2.0 percent, the strengths of samples cured under pressures of 25 kPa dramatically increased from the strength of samples cured without pressure (0 kPa), however, the strengths of samples for curing pressures of 25, 50 and 100 kPa were not clearly different.

• Periodical: Materials Science Forum (Volume 928)
• Pages: 263-268
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.928.263
• Online since: August 2018
• Authors: Anuchit Uchaipichat*
• Keywords: Cemented Clay, Curing Pressure, Stress-Strain Curve, Unconfined Compressive Strength

References

[1] A. Saglamer, R. Duzceer, A. Gokalp, and E. Yilmaz, Recent Applications of Jet Grouting for Soil Improvement in Turkey, Proc. 15th International Conference on Soil Mechanics and Geotechnical Engineering, ISSMGE, Istanbul, 3 (2001) 1839-1842.

[2] G. Burke, Jet Grouting Systems: Advantages and Disadvantages, ASCE Geotech. Special Publ. 12 (2004) 875-886.

[3] K.M. Rollins, M.E. Adsero, D.A. Brown, Use of Jet Grouting to Increase Lateral Pile Group Resistance in Sofy Clay, The 14 th World Conference on Earthquake Engineering, Beijing, China, (2008).

DOI: 10.1061/41023(337)34

[4] B. Kalantari, B.K.K. Huat, Peat Soil Stabilization Using Ordinary Portland Cement, Polypropylene Fibers, and Air Curing Technique, Electron. J. Geotech. Eng. 13(J) (2008) 1-13.

[5] A. Uchaipichat, Laboratory Investigation of Thermal Effect on Compressive Strength of Cement Admixed Clay, Electron. J. Geotech. Eng. 15(M) (2010) 1277-1284.

[6] M. Park, J. Jeon, S. Lee, Assessment of Geotechnical Characteristics on Cement-Admixed Composite, Proceedings of the Twenty-third International Offshore and Polar Engineering Anchorage, Alaska, USA, (2013), pp.663-668.

[7] A. Uchaipichat, Effect of Curing Pressure on Compression and Consolidation Behaviorsof Cement Admixed Clay, Key Eng. Mater.44 (2017) 71-76.

DOI: 10.4028/www.scientific.net/kem.744.71

[8] ASTM D2166, Standard test method for unconfined compressive strength of cohesive soil, ASTM International, West Conshohocken, PA, 2003.