Concrete composition

A concrete having a high damping capacity which comprises sand, gravel, cured (hydrated) cement, and vegetable gum particles coated with a cured resin derived from a waterbased and/or dispersible resin, said coated gum particles comprising between 2 and 15 weight percent based upon the total weight of the concrete composition, said concrete composition having about a 0.37 to 0.45 water-cement ratio.

The process for forming a concrete composition having a high damping capacity and structurally acceptable flexural strength (400 to 800 psi) which comprises mixing sand, gravel, cement, water, and a water dispersion containing vegetable gum particles coated with a water-based and/or dispersible curable resin and a curing agent for said resin, the total concentration of water in the resultant mixture being between about 0.37 and 0.45 weight based upon the cement weight, the concentration of said coated gum particles being between about 2 and 15 weight percent based upon the total weight of the concrete composition and drying said mixture to substantially completely cure the cement and the resin.

A curable concrete composition suitable for forming concrete having a high damping capacity which comprises sand, gravel, cement, water, vegetable gum particles coated with a water dispersible curable resin, the coated gum particles being present in amounts equal to between about 5 to about 100 percent of the volume of the sand in the composition, the relative concentration of resin and curing agents being controlled to cause substantial complete curing of the resin within about the same time necessary to cause substantially complete curing of the cement composition.

A concrete composition having a high damping capacity which comprises sand, gravel, water, cement and vegetable gum particles coated with a polymerized resin, said vegetable gum particles coated with polymerized resin being present in amounts of between about 5 and about 100 percent of the volume of the sand in the composition.

A process for forming concrete having a high damping capacity and structurally acceptable flexual strength (400-800 psi) comprising the following steps:

• mixing sand, gravel, cement, water, and a water dispersion containing vegetable gum particles coated with a water-base and/or dispersible curable resin and a curing agent for said resin said coated vegetable gum particles being added in amounts equivalent to 10 to 100 volume percent of the sand in the composition;
• and
• drying the mixture of step (a) to cure the cement and resin and form concrete.

A curable concrete composition suitable for forming concrete having a high damping capacity which comprises sand, gravel, cement, water, and vegetable gum particles coated with a water dispersible curing agent, the coated gum particles being present in amounts equal to between 20 to 50 percent of the volume of the sand in the composition, the relative concentration of resin and curing agent being controlled to cause substantially complete curing of the resin within about the same time necessary for the cement in the concrete composition to set.

A concrete having a high damping capacity which comprises sand, gravel, water, hydrated cement, and vegetable gum particles coated with a polymerized resin, said vegetable gum particles coated with polymerized resin being present in amounts of between 20 to 50 percent of the volume of the sand in the composition.

A curable composition suitable for forming concrete having a high damping capacity which comprises sand, gravel, cement, and between about 5 and 30 gallons per cubic yard of concrete of a liquid gum comprising a dispersion of gum particles in a polymeric liquid comprising water and solubilized hardenable resin, said composition having a water-cement ratio of between about 0.37 and 0.45.

A concrete having a high damping capacity which comprises sand, gravel, cured (hydrated) cement, latex, and vegetable gum particles secured to and within the concrete by a hardened polymeric liquid comprising a cured water dispersable resin, said gum particles, latex, and polymeric liquid together comprising between about 1 and 20 weight percent based upon the total weight of the concrete composition, said concrete composition having about a 0.37 to 0.45 total water-cement ratio.