Dry mix and concrete composition containing bed ash and related methods
Embodiments of a dry mix for producing a concrete composition are provided. The dry mix includes aggregate, cement, and bed ash. The bed ash contains the combustion product of a fluidized bed coal combustion reaction. Additionally, embodiments of a method of preparing the dry mix and embodiments of a method of preparing a concrete composition are provided. The dry mix is also suitable for repairing soil slips, and embodiments of a method of repairing a soil slip are also provided.
1. A dry mix, comprising:
aggregate;
cement; and
bed ash;
wherein the bed ash comprises a combustion product of a fluidized bed coal combustion reaction; and
wherein the cement and the bed ash are premixed such that the cement coats the bed ash.
2. The dry mix of claim 1 , wherein the ratio of bed ash to cement is from 3:1 to 5:1.
3. The dry mix of claim 1 , wherein the ratio of bed ash to cement is 4:1.
4. The dry mix of claim 1 , comprising:
from 35% to 75% by weight aggregate;
from 30% to 50% by weight bed ash; and
from 5% to 15% by weight cement.
5. The dry mix of claim 1 , comprising:
about 50% by weight aggregate;
about 40% by weight bed ash; and
about 10% by weight cement.
6. The dry mix of claim 1 , wherein the aggregate is 2″×3″ rock.
7. The dry mix of claim 1 , wherein the aggregate is limestone.
8. The dry mix of claim 1 , wherein the fluidized bed coal combustion reaction involves high-sulfur coal.
9. The dry mix of claim 1 , wherein the bed ash meets the requirements of the EPA Class 1 water quality standards, as tested according to ASTM D3987-85.
10. The dry mix of claim 1 , wherein the cement includes at least one of type I cement, type II cement, type III cement, or calcium sulfoaluminate cement.
11. A dry mix, comprising:
aggregate;
cement; and
bed ash;
wherein the bed ash comprises a combustion product of a fluidized bed coal combustion reaction;
wherein the fluidized bed coal combustion reaction involves high-sulfur coal; and
wherein the combustion product has been post treated with quicklime.
12. A dry mix, comprising:
aggregate;
cement;
bed ash; and
fluorite;
wherein the bed ash comprises a combustion product of a fluidized bed coal combustion reaction.
13. A method of preparing a dry mix, comprising the steps of:
providing bed ash and cement, the bed ash comprising a combustion product of a fluidized bed coal combustion reaction;
mixing the cement and the bed ash; and
adding aggregate to the mixed cement and bed ask;
wherein the mixing step is performed until the cement coats the bed ash.
14. The method of claim 13 , wherein the providing step further comprises providing the bed ash and the cement in a ratio of 4:1 of the bed ash to the cement.
15. The method of claim 13 , further comprising the step of obtaining the bed ash from the fluidized bed coal combustion reaction of high sulfur coal.
16. The method of claim 15 , wherein the combustion product has been treated with quicklime.
17. The method of claim 13 , further comprising the step of selecting the cement to include at least one of type I cement, type II cement, type III cement, or calcium sulfoaluminate cement.
18. A method of preparing a concrete composition, comprising the steps of:
providing a dry mix, the dry mix comprising:
aggregate;
cement; and
bed ash, the bed ash comprising the combustion product of a fluidized bed coal combustion reaction;
mixing the dry mix with a fluid containing water to form a wet concrete; and
allowing the wet concrete to cure;
wherein the mixing step is performed in a mud hole.
19. The method of claim 18 , further comprising the step of selecting the cement to include at least one of type I cement, type II cement, type III cement, or calcium sulfoaluminate cement.
20. A method of preparing a concrete composition, comprising the steps of:
providing a dry mix, the dry mix comprising:
aggregate;
cement; and
bed ash, the bed ash comprising the combustion product of a fluidized bed coal combustion reaction;
mixing the dry mix with a fluid containing water to form a wet concrete;
applying the wet concrete to an underground road or to a hole in an underground road;
allowing the wet concrete to cure.
21. The method of claim 20 , further comprising the step of selecting the cement to include at least one of type I cement, type II cement, type III cement, or calcium sulfoaluminate cement.