The authors defend their method of sample preparation (sand being prepared to a specified density in a tube, saturated, and then pressure grouted, as to opposed to simply preparing a vat of grout and then dumping the sand into it before it begins to gel) on the grounds that the sand could be prepared to any specified density that the sand could be saturated prior to groutings to model the common field condition and that when the samples were removed from the mold, they were the right size and required little effort in trimming. However, they agree with the discussor's point that the percentage of sodium silicate in the grout is not the only factor in a mix's resistance to creep rupture and emphasize that the minimum of 50% applies only to the a particular grouting mix used, one in which formamide was the gelling agent. In response to inquiries about the durability of the grout, they note that some testing of samples aged as much as a year give strengths which indicated no deterioration. However, these samples had been stored in the original plastic-tube mold tightly wrapped in plastic bags and hence not subjected to long term air drying. Therefore, the curing environment's effect on the grout's longevity is an area deserving of further study.

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Filing Info

  • Accession Number: 00314625
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 14335
  • Files: TRIS
  • Created Date: Oct 8 1980 12:00AM