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Accelerating agents for accelerating hardening of cement

  • US 4,257,814 A
  • Filed: 06/26/1979
  • Issued: 03/24/1981
  • Est. Priority Date: 05/10/1977
  • Status: Expired due to Term
First Claim
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1. A method of at least partially filling a cavity in an underground mine which method comprises the steps of(a) where required, defining said cavity using shuttering,(b) charging to said cavity a first aqueous slurry containing a hydraulic cement and concurrently charging and mixing with said first aqueous slurry a second aqueous slurry containing an agent for accelerating hardening of the hydraulic cement and(c) permitting the mixed slurries to harden into a supportive concrete-like material in the cavity.

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