Treatment of fly ash contaminated with activated carbon
Fly ash contaminated with activated carbon is treated to neutralize the activated carbon by placing the contaminated fly ash in a rotary mill and introducing ozone. The result is that entrained air in concrete made from activated fly ash will contain greater than 4 percent entrained air.
1. A method for treating fly ash contaminated with activated carbon so as not to negatively limit the amount of entrained air in concrete made from the contaminated fly ash, comprising the steps of:
grinding fly ash contaminated with activated carbon in an atmosphere of ozone in an activation process that includes a specialized rotary mill having media that is tailored so as to preferentially grind aspherical fly ash particles so as to increase the surface area thereof by breaking the aspherical particles apart, and so as to preferentially rough up the surface of the spherical particles to increase the reactivity thereof by increasing surface area;
intergrinding the fly ash with a calcium additive in the activation process to calcium coat the ozone-treated fly ash.
2. The method of claim 1 , wherein the ozone-treated fly ash is activated to increase the surface area thereof.
3. The method of claim 1 , wherein the activated fly ash is intergound with a high range water reducer.
4. A method for treating fly ash contaminated with activated carbon so as not to negatively limit the amount of entrained air in concrete made from the contaminated fly ash, comprising the steps of:
grinding fly ash contaminated with activated carbon in an atmosphere of ozone in a specialized rotary mill; wherein the contaminated fly ash is ground in the rotary mill that includes media that is tailored so as to preferentially grind aspherical fly ash particles so as to increase the surface area thereof by breaking the aspherical particles apart, and so as to preferentially rough up the surface of the spherical particles to increase the reactivity thereof by increasing surface area.
5. A method for treating fly ash contaminated with activated carbon so as not to negatively limit the amount of entrained air in concrete made from the contaminated fly ash, comprising the steps of:
grinding fly ash contaminated with activated carbon in an atmosphere of ozone in a specialized rotary mill that includes media that is tailored so as to preferentially grind aspherical fly ash particles so as to increase the surface area thereof by breaking the aspherical particles apart, and so as to preferentially rough up the surface of the spherical particles to increase the reactivity thereof by increasing surface area;
intergrinding the ozone-treated fly ash and the calcium additive in a specialized rotary mill having tailored media of different size and shape so as to produce calcium-coated fly ash.
6. The method of claim 5 , and further including the step of intergrinding the calcium-coated fly ash with ozone-treated fly ash in a specialized rotary mill having tailored media.
7. The method of claim 6 , and further including the step of adding a high range water reducer when intergrinding the calcium coated fly ash with the ozone treated fly ash.