Research Article
Sep 1972

Experimental Cationic Asphalt Emulsion Grouting

Publication: Journal of the Soil Mechanics and Foundations Division
Volume 98, Issue 9

Abstract

As the reservoir filled behind Morrow Point Dam, leakage increased around the limits of the cement grout curtain on the left abutment. A short distance downstream, leakage into the underground power plant drainage tunnel reached 429 gpm. A cationic asphalt emulsion grout, triggered with a hydrated lime slurry, was chosen to plug the large flowing water channels. Injection of 10,100 gal. of asphalt emulsion reduced leakage into the power plant drainage tunnel by approximately 65%. The long-term effectiveness of the asphalt emulsion injection was difficult to evaluate because the reservoir was being lowered during the injection and remained low until after the cement grouting. Long strings of asphalt, ejected from holes during the asphalt grouting and subsequent cement grouting, indicated that the asphalt residue was plastic rather than hard. Present leakage into the drainage tunnel with a full reservoir is 37 gpm as compared with 429 gpm prior to grouting.

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Published In

Journal of the Soil Mechanics and Foundations Division
Volume 98Issue 9September 1972
Pages: 859 - 868

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Published in print: Sep 1972
Published online: Feb 12, 2021

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Lloyd R. Gebhart, M.ASCE
Civ. Engr., Div. of Construction, Bureau of Reclamation, U.S. Dept. of the Interior, Engrg. and Research Center, Denver, Colo.

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