Recycled compositions for construction, and methods of utilizing and producing the same
A low density annular grout composition for filling voids. The composition may consist of cementitious fly ash, water, set retarder and cellular foam. The composition may have a compressive strength of between 100 and 600 psi at seven days and less than 1500 psi at 28 days. The composition may have a density between 20 and 75 pcf. Also disclosed is a method of filling a void with a low density annular grout composition. The method can include determining the time necessary to fill the void, adding water and set retarder to a cementitious fly ash to make a wet mixture, adding air to the wet mixture, and adding the composition to the void.
1. A low density annular grout composition for filling voids consisting essentially of:
between 30% and 85% air by volume;
between 50% and 90% class C fly ash by weight;
between 20% and 40% water by weight; and
between 0.01% and 2% set retarder by weight,
wherein the composition has compressive strength of between 100 and 600 psi at seven days, a compressive strength of less than 1500 psi at 28 days, and a density of between 20 and 75 pcf.
2. The composition of claim 1 , wherein the air is between 40% and 65% by volume of the composition.
3. The composition of claim 1 , wherein the class C fly ash is between 70% and 80% by weight of the composition.
4. The composition of claim 1 , wherein the water is between 20% and 30% by weight of the composition.
5. The composition of claim 1 , wherein the set retarder is between 0.01% and 1.0% by weight of the composition.
6. The composition of claim 1 , wherein
the air is between 40% and 65% by volume;
the class C fly ash is between 60% and 80% by weight;
the water is between 20% and 35% by weight; and
the set retarder is between 0.01% and 1.0% by weight.
7. The composition of claim 1 or 6 , wherein the water to class C fly ash ratio in the composition is between 0.15 to 0.40.
8. The composition of claim 1 , or 6 , wherein the volume of air results from an air entraining agent.
9. The composition of claim 8 , wherein the air entraining agent is a cellular foam.
10. A low density annular grout composition for filling voids consisting essentially of:
between 30% and 85% air by volume;
between 30% and 90% class C fly ash by weight,
between 0.1% and 50% class F fly ash by weight;
between 20% and 40% water by weight; and
between 0.01% and 2% set retarder by weight,
wherein the composition has compressive strength of between 100 and 600 psi at seven days, a compressive strength of less than 1500 psi at 28 days, and a density of between 20 and 75 pcf.
11. The composition of claim 10 , wherein the air is between 40% and 65% by volume of the composition.
12. The composition of claim 10 , wherein the class C fly ash is between 70% and 80% by weight of the composition.
13. The composition of claim 10 , wherein the water is between 20% and 30% by weight of the composition.
14. The composition of claim 10 , wherein the set retarder is between 0.01% and 1.0% by weight of the composition.
15. The composition of claim 10 , wherein the class F fly ash is between 10% and 40% by weight of the composition.
16. The composition of claim 10 , wherein the air is between 40% and 65% by volume;
the class C fly ash is between 60% and 80% by weight;
the class F fly ash is between 10% and 40% by weight;
the water is between 20% and 35% by weight; and
the set retarder is between 0.01% and 1.0% by weight.
17. The composition of claim 10 or 16 , wherein the water to class C fly ash ratio in the composition is between 0.15 to 0.40.
18. The composition of claim 10 or 16 , wherein the volume of air results from an air entraining agent.
19. The composition of claim 18 , wherein the air entraining agent is a cellular foam.