Compositions and methods for curing concrete
A composition that may be used to retain moisture within fresh concrete as it cures to optimize the curing of the concrete may include one or more hardening and densifying agents and one or more temporary moisture sealing agents. Additionally such a composition may include a siliconate. The hardening and densifying agent of such a composition may penetrate the surface of fresh concrete to react with free lime, providing the fresh concrete with a strong surface. The temporary moisture sealing agent may form a moisture barrier on the surface of the fresh concrete to prevent moisture from escaping from the fresh concrete before the fresh concrete has sufficiently cured. The temporary moisture sealing agent may degrade within a matter of days, facilitating its removal from the surface of the concrete once the concrete has cured and enabling further treatment of the surface without undue delay.
1. A composition useful for curing concrete, comprising:
a hardening and densifying agent; and
a temporary moisture sealing agent comprising a material that forms a film on a surface of the concrete without substantially entering into pores in the surface of the concrete and that will break down and self-dissipate to facilitate its complete removal from the surface of the concrete less than a month after its application as a film to the surface of the concrete.
2. The composition of claim 1 , wherein the hardening and densifying agent comprises at least one silicate.
3. The composition of claim 2 , wherein the at least one silicate comprises at least one of lithium polysilicate, sodium silicate and potassium silicate.
4. The composition of claim 2 , further comprising at least one siliconate.
5. The composition of claim 4 , wherein the at least one siliconate comprises potassium methyl siliconate.
6. The composition of claim 4 , wherein:
the hardening and densifying agent includes:
the at least one silicate comprising about 10 percent to about 20 percent of a total weight of the composition; and
the at least one siliconate comprising about three percent to about six percent of the total weight of the composition;
the temporary moisture sealing agent comprises about 30 percent to about 60 percent of the total weight of the composition; and
further comprising water.
7. The composition of claim 6 , wherein the water comprises a balance of the total weight of the composition.
8. The composition of claim 1 , wherein the hardening and densifying agent comprises colloidal silica.
9. The composition of claim 8 , wherein the hardening and densifying agent further comprises at least one siliconate.
10. The composition of claim 8 , wherein:
the hardening and densifying agent includes:
the colloidal silica comprising about 10 percent to about 20 percent of a total weight of the composition; and
the at least one siliconate comprising about three percent to about six percent of the total weight of the composition;
the temporary moisture sealing agent comprises about 30 percent to about 60 percent of the total weight of the composition; and
further comprising water.
11. The composition of claim 1 , wherein the temporary moisture sealing agent comprises wax.
12. The composition of claim 11 , wherein the wax comprises at least one of a paraffin wax, a polyethylene wax, and a scale wax.
13. The composition of claim 1 , wherein the temporary moisture sealing agent comprises at least one of an oil or oil based curing compound, a polyvinyl alcohol (PVA) based curing compound, a chlorinated rubber curing compound, and a resin based curing compound.
14. The composition of claim 1 , wherein the temporary moisture sealing agent comprises a water-soluble film-forming polymer.
15. The composition of claim 1 , wherein the temporary moisture sealing agent comprises at least one of a chloroparaffin, a fatty acid triglyceride, an alkyl sulfonic ester, a phthalates, a polymer derived from glycerol, a polymer derived from an iso-cyanate or a thio-cyanates, a polymer derived from a sulfur-containing reactant and a polymer derived from a silicon-containing reactant.
16. The compound of claim 1 , wherein the temporary moisture sealing agent is blended with the hardening and densifying agent.