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Abstract

Fourteen model soil-cement columns were installed in two containers in the laboratory to investigate the influence of mixing energy consumption on the unconfined compressive strength of soil-cement mixtures by varying mixing conditions. The variables of mixing conditions included cement content, speed of installation (mixing down and up), rate of mixer rotation, number of mixing cycles, and column length. Electric power was measured during the installation of all the model columns. The factors that influenced the mixing energy consumption during the installation were evaluated, and a relationship between the mixing energy consumption and the unconfined compressive strength of soil-cement mixtures was developed. This relationship was compared with that obtained in the laboratory soil-quicklime mixing tests from another study. The test results show that the unconfined compressive strength increases with an increase of mixing energy consumption, up to a threshold value. Any further increase of the energy does not provide a significant contribution to the strength of soil-cement mixtures.

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References

Terashi

The State of Practice in Deep Mixing Method. In Grouting and Ground Treatment, Geotechnical Special Publication No. 120 ( Johnsen

L. F.

, Bruce

D. A.

, and Byle

M. J.

, eds.), ASCE Press, Washington, D.C., Vol. 1, 2003, pp. 25–49.

Miura

, Bergado

D. T.

, Sakai

, and Nakamura

. Improvements of Soft Marine Clays by Special Admixtures Using Dry and Wet Jet Mixing Methods. Proc., 9th Southeast Asian Geotechnical Conference, Bangkok, Thailand, 1987, pp. 8-35-8–44.

Enami

, and Hibino

. Improvement of Foundation Ground by Using a Deep Soil Blender with Free Blades (in Japanese). Tsuchi-to-kiso, Japanese Society of Soil Mechanics and Foundation Engineering, Vol. 39, No. 10, 1991, pp. 37–42.

Shen

S.-L.

Behaviour of Deep Mixing Columns in Composite Clay Ground. Ph.D. thesis, Saga University, Saga, Japan, 1998.

Shen

S.-L.

, Miura

, and Koga

. Interaction Mechanism Between Deep Mixing Column and Surrounding Clay During Installation. Canadian Geotechnical Journal, Vol. 40, No. 2, 2003, pp. 293–307.

Shen

S.-L.

, Han

, and Huang

X. C.

. Field Evaluation of Deep Mixing Effects on Properties of Surrounding Soil. Journal of Geotechnical & Geoenvironmental Engineering, submitted for publication.

Kitazume

Deep Mixing Method (in Japanese). Foundation Engineering and Equipment, Vol. 24, No. 7, 1996, pp. 14–19.

Nishida

, and Miura

. Study of the Mixing Energy on the Deep Mixing Improvement of Sensitive Clay by DJM (in Japanese). Journal of Construction Management and Engineering, No. VI-27(516), 1996, pp. 165–172.

Kinoshita

, Miura

, and Fujimoto

. Effect of Mixing Energy on Strength of Soil-Cement Column (in Japanese). Proc., Annual Meeting of the Japan Society of Civil Engineers Vol. 3 (Kyushu Branch), Kitakyushu, Japan, 1999, pp. 486–487.

10.

Miura

, Chai

J. C.

, Hino

, and Shimoyama

. Depositional Environment and Geotechnical Properties of Soft Deposit in Saga Plain. Indian Geotechnical Journal, Vol. 28, No. 2, 1998, pp. 121–146.

11.

Sridharan

, El-Shafei

, and Miura

. Mechanisms Controlling the Undrained Strength Behavior of Remolded Ariake Marine Clays. Marine Georesource and Geotechnology, Vol. 20, No. 1, 2002, pp. 21–50.

12.

Tanaka

, Locat

, Shibuya

, Soon

T. T.

, and Shiwakoti

D. R.

. Characterization of Singapore, Bangkok, and Ariake Clays. Canadian Geotechnical Journal, Vol. 38, No. 2, 2001, pp. 378–400.

13.

Standard Soil Tests—Methods and Explanations (in Japanese). Japanese Geotechnical Society, Tokyo, 2001.

14.

Shen

S. L.

, Han

, Huang

X. C.

, and Du

S. J.

. Laboratory Studies on Property Changes in Surrounding Clays Because of Installation of Deep Mixing Columns. Marine Georesources and Geotechnology, in press.

Laboratory Evaluation of Mixing Energy Consumption and Its Influence on Soil-Cement Strength

Abstract

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