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Permanence of Chemically Grouted Sands

by Raymond J. Krizek, Northwestern Univ, Dep of Civil, Engineering, Evanston, IL, USA,
Mark Madden, Northwestern Univ, Dep of Civil, Engineering, Evanston, IL, USA,



Document Type: Proceeding Paper

Part of: Issues in Dam Grouting

Abstract:

Test specimens were prepared with one of three uniformly graded sands of a fine gravel and injected with one of five silicate or two polyacrylic grouts. The polyacrylic grouts showed no signs of deterioration with time and were unaffected by the applied gradient. The silicate-based sodium aluminate grout exhibited slight increases in permeability during the initial stages of the test, but the permeability stabilized after several weeks and the grout appeared to be relatively intact upon completion of the tests. The remaining silicate-based grouts showed large increases in permeability during the first weeks of testing, and the magnitude and rate of these increases were influenced by the curing time prior to testing and the magnitude of the applied gradient. Refs.

Subject Headings: Chemical grouting | Grouting | Silica | Sandy soils | Soil grouting | Sand (material) | Soil strength

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