Claims
- 1. A method for grouting a cavity in a member having a longitudinal extent, said method comprising:
- forming a pumpable cement grout by mixing:
- hydraulic cement;
- water in an amount sufficient so that the water-to-cement ratio of said grout is from about 0.60 to about 1.00 by weight; and
- pre-generated aqueous foam in an amount sufficient to adjust the wet density of said grout to a value of from about 48 to about 72 pounds per cubic foot; and
- pumping said pumpable cement grout into said cavity so that said grout fills said cavity by flowing in a generally longitudinal direction through said member.
- 2. The method of claim 1, wherein the step of forming said grout further comprises mixing a superplasticizing agent into said grout in an amount from about 6 to about 20 ounces per hundredweight of said grout.
- 3. The method of claim 1, wherein the step of forming said grout further comprises mixing bentonite into said grout.
- 4. The method of claim 3, wherein the step of mixing bentonite into said grout comprises mixing bentonite into said grout in an amount from about 5 to about 10 pounds per cubic yard.
- 5. The method of claim 1, wherein said cavity is an annular cavity formed intermediate a tubular external member and an internal member disposed in said tubular external member.
- 6. The method of claim 5, wherein said tubular external member is a concrete sewer pipe and said internal member is a plastic liner pipe.
RELATED APPLICATIONS
This is a continuation-in-part application of copending application Ser. No. 07/446,612 filed Dec. 6, 1989, now U.S. Pat. No. 5,063,967.
US Referenced Citations (12)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
446612 |
Dec 1989 |
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