Selection of Chemical Grout for Mattmark Dam

by Herbert H. Einstein, (A.M.ASCE), Asst. Prof. (Visiting); Massachusetts Inst. of Technol., Cambridge, MA,
Gerold Schnitter, (M.ASCE), Prof. of Civ. Engrg.; ETH, Zurich, Switzerland and Dir. of the Inst. for Hydr. Res. and Soil Mech. at ETH, Zurich, Switzerland,

Serial Information: Journal of the Soil Mechanics and Foundations Division, 1970, Vol. 96, Issue 6, Pg. 2007-2023

Document Type: Journal Paper


Four chemical grouts, two nearly identical sodium silicates (Algonite and Consonda), and 2 polymers (Bakelite and Polythixon) underwent extensive laboratory evaluation. First, the grouts alone were examined with regard to viscosity-time behavior, gelation time, temperature-influence, stability, deformability, and toxic properties. Bakelite was eliminated because of its rigid deformability. The second step tested grout-soil interaction: The injectability and permeability reduction of Algonite and Polythixon were examined in laboratory injections tests. Both grouts reduced permeability by an order of magnitude, but Polythixon had to be eliminated because of its limited injectability. Finally, long-term leaching tests on Algonite were performed to investigate the effect of syneresis. Satisfactory results led to the recommendation of this grout for eventually successful application. This evaluation procedure is generally valid for any grout selection.

Subject Headings: Chemical grouting | Dams | Grouting | Laboratory tests | Deformation (mechanics) | Sodium | Silica | Polymer

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