specifications - FAACO - Federal Aviation Administration Contract ...

FTWIC-2235June, 2009B. After wetting and just prior to grouting, sprinkle the surface lightly with cement toimprove the bond between the grout and the surface.C. After mixing, quickly and continuously place the grout to avoid overworking,segregation and breaking down of the initial set. Mix and place the grout according tothe manufacturer's recommendations. Cure grout using wet curing method for concrete.Grout shall receive a steel trowel finish.3.15 NON-SHRINK GROUT:A. Obtain field technical assistance from the grout manufacturer, as required, to insure thatgrout mixing and installation comply with the manufacturer's recommendations andprocedures.B. Saturate the foundation for non-shrink grouts twenty-four (24) hours before installationand clear of excess water. Free baseplates or bedplates of oil, grease, laitance and otherforeign substances.C. Place grout according to the manufacturer's directions so that spaces and cavities belowthe top of the baseplates and bedplates are completely filled. Provide forms wherestructural components of the baseplates or bedplates do not confine the grout. Wherenecessary and acceptable under the manufacturer's procedures, a round head pencilvibrator, 3/4" maximum diameter may be used to consolidate the grout.D. Steel trowel finish the non-shrink grout where the edge of the grout is exposed to viewand after the grout has reached its initial set. Cut off the exposed edges of the grout at a45 degree angle to the baseplate, bedplate, member, or piece of equipment.E. Wet curing should occur for at least three (3) days, unless specified by manufacturer,with wet rags, wet burlap or polyethylene sheets. Keep cloths constantly wet for thecuring cycle.F. Clean and dry the foundation, baseplate or other surface of epoxy grouts prior toinstallation. Dry curing is acceptable for epoxy grouts.3.16 EPOXY NON-SHRINK GROUT:A. Use epoxy non-shrink grout under all machinery, pumps, equipment, and wherechemicals are present that would abate cementitious non-shrink grouts.B. Mix, install, cure, and finish epoxy grouts according to the manufacturer'srecommendations. Install grout in recommended lifts to prevent excess heat.3.17 VAPOR BARRIER:Granular fill below the vapor barrier shall be smoothed and free of protrusions that might damageor rupture the polyethylene film. Completely cover porous fill with film. Lap film not less than6" at all joints, with the top placed in the direction of concrete spreading. Use pressure-sensitivetape at all laps of vapor barrier. Lap reinforcement directly over film before placing concrete,taking precautions to prevent film punctures. Carefully cut film around pipes and wiring outlets,and then apply pressure sensitive tape around these protrusions to insure maximum barriereffectiveness.03300-26