Fly ash cementitious material and method of making a product
First Claim
1. A high strength cementitious binder mixture comprising fly ash and an alkali metal or alkaline earth metal silicate binder, the silicate binder comprising an alkali metal or alkaline earth metal silicate component and an alkali metal or alkaline earth metal hydroxide component wherein the silicate binder has a SiO2 :
- M2 O weight ratio of about 0.20;
1 to about 0.75;
1, wherein M is selected from the group consisting of Na, Li, K, 1/2Ca and 1/2Mg and, further, wherein sufficient silicate binder is present to provide said cementitious binder mixture with a compressive strength after curing of at least about 2000 psi.
5 Assignments
0 Petitions
Accused Products
Abstract
Rapid curing, high strength cementitious binder mixtures are provided containing fly ash and an alkali metal or alkaline earth metal silicate binder that has a weight ratio of SiO2 :M2 O of about 0.20:1 to about 0.75:1 wherein M is selected from the group consisting of Li, Na, K, 1/2Ca and 1/2Mg. The cementitious binder mixtures can be mixed with aggregates to provide mortar and concrete mixtures. Any of the binder, mortar and concrete mixtures can be cured under elevated temperatures to yield high strength products.
-
Citations
20 Claims
-
1. A high strength cementitious binder mixture comprising fly ash and an alkali metal or alkaline earth metal silicate binder, the silicate binder comprising an alkali metal or alkaline earth metal silicate component and an alkali metal or alkaline earth metal hydroxide component wherein the silicate binder has a SiO2 :
- M2 O weight ratio of about 0.20;
1 to about 0.75;
1, wherein M is selected from the group consisting of Na, Li, K, 1/2Ca and 1/2Mg and, further, wherein sufficient silicate binder is present to provide said cementitious binder mixture with a compressive strength after curing of at least about 2000 psi. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- M2 O weight ratio of about 0.20;
-
14. A method of manufacture of a high strength cured cementitious product comprising,
forming a mixture comprising fly ash, and an alkali metal or alkaline earth metal silicate binder wherein the silicate binder has a weight ratio SiO2 : - M2 O of about 0.20;
1 to about 0.75;
1 wherein M is selected from the group consisting of Li, Na, K, 1/2Ca and 1/2Mg, andheat treating the mixture at a temperature of at least about 40°
C. to obtain a high strength, cured cementitious product, wherein sufficient silicate binder is present in the mixture to provide a compressive strength in the cured cementitious product of at least about 2000 psi. - View Dependent Claims (15, 16, 17, 18)
- M2 O of about 0.20;
-
19. A high pressure strength cementitious material comprising a heat cured reaction product of a mixture of fly ash selected from the group consisting of Class F fly ash and Class C fly ash, and
an alkali metal or alkaline earth metal silicate binder wherein the silicate binder has a weight ratio SiO2 : - M2 O of about 0.20;
1 to about 0.75;
1,wherein M is selected from the group consisting of Li, Na, K, 1/2Ca and 1/2Mg and, further, wherein sufficient silicate binder is present to provide the cured reaction product with a compressive strength of at least about 2000 psi. - View Dependent Claims (20)
- M2 O of about 0.20;
Specification