Amine formate accelerator additives for portland cement compositions
阅读：398发布：2023-05-20
专利汇可以提供Amine formate accelerator additives for portland cement compositions专利检索，专利查询，专利分析的服务。并且Water-soluble salts of amines and formic acid are added to Portland cement compositions (e.g. concrete) to accelerate the setting time thereof. The additives exhibit a particular effectiveness for offsetting the set-retardation effect of waterreducing, set-retarding agents, (e.g. lignosulfonates) employed in Portland cement compositions.，下面是Amine formate accelerator additives for portland cement compositions专利的具体信息内容。
2. The composition of claim 1 wherein the amine contains up to about 20 carbon atoms.
3. The composition of claim 1 wherein said amine is a substantially nonhydroxyl containing amine.
4. A settable Portland cement mix consisting essentially of Portland cemenT, aggregate, water and a water-soluble amine formate salt formed by the reaction of an amine and formic acid, said salt being present in an amount sufficient to accelerate the setting time of said mix.
5. A settable Portland cement composition consisting essentially of Portland cement, water, about 0.01 to 10 weight percent of a water-soluble amine formate salt formed by the reaction of an amine and formic acid, and about 0.01 to 10 weight percent of a water-soluble, water-reducing, set-retarding agent for said composition, said amounts being based upon the weight of the cement and the amount of said formate being sufficient to offset the set-retardation effect of said water-reducing, set-retarding agent.
6. The composition of claim 5 wherein said amine contains up to about 20 carbon atoms and is selected from the group consisting of aliphatic amines, heterocyclic N-containing amines and mixtures thereof.
7. The composition of claim 5 wherein said water-reducing, set-retarding agent is selected from the group consisting of carbohydrates, polyhydroxy polycarboxylic acids, lignosulfonic acid and salts thereof, salts of boric acid, silicones, and mixtures of the foregoing.
8. The composition of claim 5 wherein the amount of said salt ranges between about 0.1 and 2 weight percent and the amount of said water-reducing agent, set-retarding agent ranges between about 0.1 and 3 weight percent.
9. An additive composition for settable Portland cement compositions, said additive composition consisting essentially of from about 10 to 90 weight percent of a water-soluble amine formate salt formed by the reaction of an amine and formic acid, and about 10 to 90 weight percent of a water-soluble, water reducing, set-retarding agent for said Portland cement composition, said amounts being based upon the weight of the additive composition and the amount of said formate being sufficient to offset the set-retardation effect of said water-reducing, set-retarding agent.
10. The composition of claim 9 wherein said amine contains up to about 20 carbon atoms.
11. The composition of claim 9 wherein said agent is selected from the group consisting of corn syrup, lignosulfonic acid and salts thereof, glucose, sucrose, and mixtures thereof.
12. A settable Portland cement composition consisting essentially of Portland cement, water, aggregate, from about 0.1 to 2 percent by weight of a water-soluble amine formate salt formed by the reaction of an amine containing up to about 20 carbon atoms and formic acid, and from about 0.1 to 3 weight percent of a water-soluble, water-reducing, set-retarding agent selected from the group consisting of carbohydrates, polyhydroxy polycarboxylic acids, lignosulfonic acid and salts thereof, salts of boric acid, silicones, and mixtures thereof, said amounts being based upon the weight of the cement and the amount of said formate being sufficient to offset the set-retardation effect of said water-reducing, set-retarding agent.
13. An additive composition for incorporation in settable Portland cement compositions, said additive composition consisting essentially of from about 10 to 90 weight percent of a water-soluble amine formate salt formed by the reaction of a substantially nonhydroxyl containing amine containing up to about 20 carbon atoms and formic acid, and about 10 to 90 weight percent of a water-soluble, water-reducing, set-accelerating agent for said Portland cement composition selected from the group consisting of carbohydrates, polyhydroxy polycarboxylic acids, lignosulfonic acid and salts thereof, salts of boric acid, silicones, and mixtures thereof, said amounts being based upon the total weight of said additive composition and the amount of said formate being sufficient to offset the set-retardation effect of said water-reducing, set-retarding retarding agent.
14. The addiTive composition of claim 13 wherein said amine comprises a mixture of aliphatic and heterocyclic N-containing amines.
15. THe additive composition of claim 13 wherein said amine is triethylamine.
16. The additive composition of claim 13 wherein said amine is cyclohexylamine.
17. The additive composition of claim 13 wherein said amine comprises a mixture of polyethylene amines.
18. The additive composition of claim 13 wherein said agent is corn syrup.
19. The additive composition of claim 13 wherein said agent is a salt of lignosulfonic acid.
20. The additive composition of claim 13 wherein said agent is a mixture of glucose and sucrose.
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