Patent ID: 6153005
Filing Date: 2000-11-28
Classification: C04B

Abstract:
A concrete mix comprising from about 1 to about 50 percent by volume of cement, from about 0 to about 75 percent by volume of washed sand, from about 0 to about 60 percent by volume of coarse aggregate, from about 4 to about 50 percent by volume water, from about 0 to about 50 percent by volume of a member selected from the group consisting of cementitious and pozzolanic materials, from about 0 to about 20 oz of water reducer per 100 pounds of cementitious and pozzolanic material, from about 0 to about 20 oz of accelerator per 100 pounds of cementitious and pozzolanic material, and from about 1 to about 90 percent by volume of air as bubbles comprising from about 0.01 to about 1.0 percent by weight of a foam stabilizing fluorinated surfactant of the formulaR.sub.f --E.sub.a --(S).sub.b --[M.sub.1 ].sub.x --[M.sub.2 ].sub.y --Hwherein R.sub.f is a perfluorinated alkyl selected from the group consisting of straight chain, branched chain, and cyclic perfluoroalkylenes of 1 to about 20 carbon atoms, perfluoroalkyls substituted with perfluoroalkoxy of 2 to about 20 carbon atoms, perfluoroalkyl oligomers and polymers of greater than 10 carbon atoms, and mixtures thereof, E is selected from the group consisting of direct bonds, alkylenes containing from 2 to about 20 carbon atoms and selected from the group consisting of branched chain, straight chain, and cyclic alkylenes, alkylenes interrupted by one or more members selected from the group consisting of, --NR--, --O--, --S--, --SO.sub.2 --, --COO--, --OOC--, --CONR--, --NRCO--, --SO.sub.2 NR--, --NRSO.sub.2 --, --SiR.sub.2 --, alkylenes terminated with a member selected from the group consisting of --CONR-- and --SO.sub.2 NR-- in which case R.sub.f is attached to the carbon or sulfur atom, and wherein R is selected from the group consisting of hydrogen, alkyl of from 1 to about 10 carbon atoms and hydroxyalkyl having 2 to about 10 carbon atoms, a and b are independently 0 or 1, M.sub.1 is a nonionic hydrophilic monomer or mixture of nonionic hydrophilic monomers, and M.sub.2 is an anionic hydrophilic monomer or mixture of anionic hydrophilic monomers, wherein x and y are both greater than zero, the sum of x+y is between about 5 and 200, and y/x+y is between about 0.01 and 0.98.