Claims
- 1. A cement composition comprising a hydraulic cement binder and
- a) a set-accelerator component selected from the group consisting of alkali or alkaline earth metal nitrate, nitrite, and formate; alkali or alkaline earth metal salts of Group VII halogen and pseudohalogen acids; alkali or alkaline earth metal thiosulfate and perchlorate; alkali or alkaline earth metal aluminates, silicates, and hydroxides; and mixtures thereof;
- b) a C.sub.2 to C.sub.6 glycol component which is defined as a two to six carbon aliphatic di- and trihydric alcohol, present in an amount effective to increase the set acceleration properties of the set-accelerator component; and
- c) a component selected from the group consisting of alkanolamines and mixtures thereof, said alkanolamines having the formula ##STR3## where R.sup.1 and R.sup.2 are hydroxyalkyl groups, and R.sup.3 is either hydrogen, a hydroxyalkyl group, or an alkyl group.
- 2. The cement composition of claim 1 wherein the amount of said C.sub.2 to C.sub.6 glycol component in said admixture is in the range of from about 0.05 to 40 weight %, based on the combined weight of glycol component and accelerator component in said admixture.
- 3. The cement composition of claim 1 wherein the amount of said C.sub.2 to C.sub.6 glycol component in said cement composition is in the range of from about 2.0 to 30 weight %, based on the combined weight of glycol component and accelerator component in said admixture.
- 4. The cement composition of claim 1 wherein said set-accelerating component is selected from the group consisting of calcium nitrate, calcium nitrite, and mixtures thereof.
- 5. The cement composition of claim 4 wherein R.sup.3 is methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl or isopentyl.
- 6. The cement composition of claim 4 wherein R.sup.3 is methyl, ethyl, propyl, or isopropyl.
- 7. The cement composition of claim 5 wherein R.sup.1 and R.sup.2 are hydroxymethyl, hydroxyethyl, hydroxypropyl, hydroxyisopropyl, or hydroxybutyl.
- 8. The cement con, position of claim 1 wherein said C.sub.2 to C.sub.6 glycol component is selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, and glycerol.
- 9. A method for making a cement con, position which contains a hydraulic cement binder, said method comprising adding to said cement composition
- a) a set-accelerator component selected from the group consisting of alkali or alkaline earth metal nitrate, nitrite, and formate; alkali or alkaline earth metal salts of Group VII halogen and pseudohalogen acids; alkali or alkaline earth metal thiosulfate and perchlorate; alkali or alkaline earth metal aluminates, silicates, and hydroxides; and mixtures thereof;
- b) a C.sub.2 to C.sub.6 glycol component which is defined as a two to six carbon aliphatic di- and trihydric alcohol, present in an amount effective to increase the set acceleration properties of the set-accelerator component; and
- c) a component selected from the group consisting of alkanolamines and mixtures thereof, said alkanolamines having the formula ##STR4## where R.sup.1 and R.sup.2 are hydroxyalkyl groups, and R.sup.3 is either hydrogen, a hydroxyalkyl group, or an alkyl group.
Parent Case Info
This application is a continuation-in-part of copending U.S. application Ser. No. 08/046,110, filed on Apr. 9, 1993, which is a continuation of U.S. application Ser. No. 07/827,196, filed on Jan. 28, 1992, now abandoned, the entire disclosures of which are incorporated herein by reference.
US Referenced Citations (10)
Foreign Referenced Citations (10)
Number |
Date |
Country |
2600563 |
Jul 1977 |
DEX |
3636659 |
Apr 1987 |
DEX |
2227240 |
Apr 1973 |
FRX |
55-32800 |
Mar 1980 |
JPX |
58-185458 |
Oct 1983 |
JPX |
63-319235 |
Dec 1988 |
JPX |
8908627 |
Sep 1989 |
WOX |
697455 |
Nov 1979 |
SUX |
910548 |
Mar 1982 |
SUX |
1648920 |
May 1991 |
SUX |
Non-Patent Literature Citations (2)
Entry |
Saasen, A., Rafoss, E., Behzadi, A., "Experimental Investigation of Rheology and Thickening Time of Class G. Oil Well Cement Slurries Containing Glycerin", Cement and Concrete Research, vol. 21, pp. 911-916, 1991., Pergamon Press no month. |
European Search Report, European Patent Office, Ref. No. N.66071 SB, Application No. 93300546.4, Applicant: W. R. Grace & Co.-Conn., Date: Apr. 15, 1993. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
827196 |
Jan 1992 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
46110 |
Apr 1993 |
|