Method, composition and apparatus for controlled concrete
View Patent ↗A method is provided for use of a concrete composition and an associated apparatus. The method provides for mixing of the concrete material, accelerant powder and, optionally, an associated substance to enable the controlled hardening of the concrete material in a monolithic structure. The apparatus can dispose a slip-plane film to facilitate a relatively continuous process.
1. A process for installing a concrete composition, the process comprising:
admixing (a) a first composition comprising a concrete composition, and (b) a second composition comprising dispersed accelerant powder at a concentration of from about 0.05 percent to about 5.0 percent by weight total composition to form a projectable admixture wherein the accelerant powder is lithium carbonate and the second composition is formed by admixing an accelerator with the lithium carbonate and propylene glycol to form a first mixture wherein the first mixture is processed for a specified amount of time and wherein a second amount of accelerator is added to the first mixture forming a second mixture that is processed for an additional amount of time, at which time, the second mixture is heated and maintained at a desired temperature prior to admixing with the concrete composition;
projecting the admixture into a space between a base wall and a slip-plane wherein the slip-plane is between and adjacent to the projectable admixture and a moveable form having a surface area in an adjacent position relative to the base wall;
enabling the admixture to set to form a wall with a free wall surface; and,
moving the form to a different adjacent position wherein the slip-plane can be immediately moved from the free wall surface or left in place for later removal; and, whereby the above process is repeated to form a monolithic wall section having a surface area larger than the surface area of the form.
2. The process of claim 1 wherein the second composition comprises the accelerant effective in association with one or more of a carrier substance(s) selected from the group consisting of a powder, a liquid and a melt such that the one or more of the components controls the action of the accelerant composition to enable the projectable admixture to temporarily flow.
3. The process of claim 2 wherein the carrier substance(s) is an organic liquid composition.
4. The process of claim 1 wherein the process is performed to provide a variability of thickness less than about ten millimeters.
5. The process of claim 2 wherein the carrier is miscible in water.
6. The process of claim 1 wherein the concrete composition comprises one or more cement(s) selected from the group consisting of a calcium aluminate cement, a silicate bonded cement, a chlorine-bonded cement, a colloidal silica binder cement, a calcium silicate cement, and a colloidal alumina binder cement.
7. The process of claim 6 wherein the accelerant powder is from about 0.1 to about 1 weight percent of the total weight of projectable admixture.
8. The process of claim 1 wherein the concrete composition is a refractory composition.
9. The process of claim 1 wherein the accelerant powder comprises a flocculating agent and a setting agent.
10. The process of claim 9 further comprising adjusting the proportion of the flocculating agent and the setting agent to effectively control the action of the accelerant powder to enable the projectable admixture to temporarily flow.
11. The process of claim 1 , wherein the slip-plane comprises one or more material selected from the group consisting of a plastic, a rubber, a metallic foil, a paper and a screen.
12. The process of claim 11 wherein the material is a latex or polymer composition.
13. The process of claim 1 , wherein the accelerator is a sodium silicate.
14. The process of claim 1 , wherein the accelerator is a hydrous sodium silicate.
15. The process of claim 1 , wherein the first mixture is processed for from about 60 minutes to about 90 minutes and the temperature is maintained at from about 85 degrees Fahrenheit to about 110 degrees Fahrenheit and wherein the second mixture is processed for from about 15 minutes to about 25 minutes prior to raising the temperature to from about 110 degrees Fahrenheit to about 180 degrees Fahrenheit where the temperature is maintained for about 20 minutes to about 30 minutes prior to admixing with the concrete composition.
16. The process of claim 1 , wherein the first mixture is processed for about 75 minutes and the temperature is maintained at from about 85 degrees Fahrenheit to about 110 degrees Fahrenheit and wherein the second mixture is processed for about 20 minutes prior to raising the temperature to from about 140 degrees Fahrenheit to about 156 degrees Fahrenheit where the temperature is maintained for about from 20 minutes to about 30 minutes prior to admixing with the concrete composition.