Flowable compositions 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 method of making a pervious composition comprising:
mixing the following to form a pervious composition:
between 60% and 85% air by volume from a cellular pervious foam;
between 70% and 85% Class C fly ash by weight;
between 15% and 30% water by weight; and
between 0.01% and 2.0% retarder by weight;
the composition having a time to set of less than 4 hours, a compressive strength of between 50 and 600 PSI after 28 days, and a density of between 20 and 50 PCF, where the composition does not include cement.
2. The method of claim 1 , wherein the air by volume from the cellular pervious foam is between 65% and 80% by volume of the composition.
3. The method of claim 1 , wherein the Class C fly ash is between 70% and 80% by weight.
4. The method of claim 1 , wherein the water is between 20% and 30% by weight.
5. The method of claim 1 , wherein the retarder is between 0.01% and 1.5% by weight.
6. The method of claim 1 , wherein the set time is less than 3 hours.
7. The method of claim 1 , wherein the compressive strength is between 50 and 500 PSI after 28 days.
8. The method of claim 1 , wherein the density is between 20 and 40 PCF.
9. The method of claim 1 , wherein
the air by volume from a cellular pervious foam is between 65% and 80% by volume;
the Class C fly ash is between 70% and 80% by weight;
the water is between 20% and 30% by weight; and
the retarder is between 0.01% and 1.5% by weight;
the composition having a time to set of less than 3 hours, a compressive strength of between 50 and 500 PSI after 28 days, and a density of between 20 and 40 PCF.
10. A method of making a pervious composition consisting essentially of:
mixing the following to form a pervious composition:
between 70% and 80% air by volume from a cellular pervious foam;
between 75% and 80% Class C fly ash by weight;
between 20% and 25% water by weight; and
between 0.1% and 1.0% retarder by weight;
the composition having a time to set of less than 2 hours, a compressive strength of between 75 and 400 PSI after 28 days, and a density of between 25 and 40 PCF.