Cementitious grout patching formulations and processes

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United States of America Patent

PATENT NO 4769077
SERIAL NO

07068889

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Abstract

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A dry cementitious composition which is shrinkage compensating and fast-setting for use in grouting repair of concrete surfaces. The cementitious composition comprises a hydraulic cement mixture of a major amount of a first portland cement constituent and a minor amount of a second expansive ettringite sulfoalumina cement constituent, an aggregate component, and an accelerator component. The accelerator component is a polyvalent metal salt of formic acid, specifically an alkaline earth metal formate such as calcium formate. Specific formulations include a mixture of Type I, Type IP, or Type III cement as a first constituent with Type K, Type M, or Type S cement as a second constituent, with the ratio of the first to the second constituent within the range of 2-3. The material may be employed to affect a grouting repair by mixing the dry formulation with water to provide a cementitious slurry which sets to provide a compressive strength of at least 4000 psi at 24 hours and a positive volume change of no more than 0.1% at 14 days curing.

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Patent Owner(s)

Patent OwnerAddress
TEXAS INDUSTRIES INC 8100 CARPENTER FREEWAY DALLAS TEXAS 75247 A DE CORPNot Provided

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Crocker, David A Grand Prairie, TX 4 56

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