Abstract: An admixture for a dense and durable concrete mix consisting essentially of diatomaceous earth and silica fume in the ratio of from 1 to 1 up to 1 to 8. Optionally, fly ash and lignosulfonate dispersant may be added to the admixture.
Type:
Grant
Filed:
November 27, 1991
Date of Patent:
April 12, 1994
Assignee:
Specrete - IP Incorporated
Inventors:
David A. Smetana, Alfonzo L. Wilson, Richard J. Lenczewski
Abstract: A pumpable backfill grout which hardens into a controlled low strength material and an additive for making up such a backfill grout. The grout consists essentially of portland cement, a smooth surfaced vesicular expanded perlite, fly ash, fine aggregate, water, an air entraining agent, a quick dispersing thixiotropic suspending agent and a bentonite thickening agent.
Type:
Grant
Filed:
September 23, 1992
Date of Patent:
March 15, 1994
Assignee:
Specrete-IP Incorporated
Inventors:
David A. Smetana, Richard J. Lenczewski, Alfonzo L. Wilson
Abstract: Aluminum leafing flakes for expanding grout are adhered to microparticles to distribute the flakes in dry and wet grouts. The flakes have a protective coating sensitive to the alkalinity of dry and wet grouts alkaline. The coated flake carrying microparticles may be blended and stored with dry grouts or used directly with wet grouts as part of a fluidifier for the grout.