Recycled compositions for construction, and methods of utilizing and producing the same

A method of determining a low density annular grout composition for filling a void comprising:

• identifying at least one fly ash for use in the composition;
• determining a water demand of each fly ash within the composition;
• calculating a water demand for the composition;
• determining a compressive strength for the composition;
• determining the amount of air content necessary for the composition to have a 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;
• determining the time necessary to fill the void;
• and
• determining the concentration of set retarder necessary to delay the composition from setting before the void is completely filled.

A method of filling a void with a low density annular grout composition comprising:

• 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,
• wherein the composition has a 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;
• and
• adding the composition to the void.

A method of formulating an annular grout composition, comprising:

• mixing a first baseline mixture of a cementitious fly ash with water to about a 0.25 water to fly ash ratio, wherein the first baseline mixture is divided into at least three sub-mixtures including one sub-mixture with no added air content and two sub-mixtures with different air contents;
• measuring fluid density, penetration resistance and compressive strength of the sub-mixtures for at least two different times post mixing;
• mixing a second mixture of at least one cementitious fly ash with water with no additional air content;
• measuring fluid density, penetration resistance and compressive strength of the second mixture for at least two different time post mixing;
• calculating air content necessary to achieve a specific density for a third mixture of cementitious fly ash with water;
• and
• calculating a compressive strength for the third mixture at a specific age and air content using data from the first baseline mixture and the second mixture.