Page 31 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

16 Major Process Equipment Maintenance and Repair

5. Foundation anchor bolt sleeves should be filled with a nonbond-
ing, pliable material such as asphalt or silicone rubber molding
compound to prevent a water pocket around the anchor bolt.

6. A split hose or duct tape may be placed around the exposed threads
of anchor bolts to prevent direct contact between the grout and an-
chor bolts.

7. The temperature of the baseplate or soleplate, supporting concrete
foundation, and the grout should be maintained between 40 and
90°F during grouting and for a minimum of 24 hours thereafter.

8. Grout should be mixed with only water to produce the desired con-
sistency according to the procedures recommended by the manu-
facturer.
Cuution: Check the quality of the water being used; ensure that it
is oil free.

9. The placement of the grout should be rapid and continuous so as to
avoid cold joints under the baseplate or soleplate. Generally, it is
best to start placing the grout at one end of the baseplate or sole-
plate and work toward the other end to force the air from beneath
the baseplate or soleplate to eliminate voids as the grout moves
along. A floating trowel is very helpful in forcing grout under-
neath by simply applying pressure on top. Plywood strips, sheet
metal strips, wires, and push rods may also be used to place the
grout completely under the baseplate or the soleplate, but care
should be exercised in order to prevent working air into the grout.

10. Grout should be cut back to the bottom outer edge of the baseplate
or soleplate and tapered to the existing concrete. The top of the
grout on baseplates with flangetype support should be at the top
of the flange. The top of the grout on baseplates with solid sides
and soleplates should be 1 in. above the bottom of the baseplate or
the underside of the soleplate. The outside top edges of the grout
should be chamfered at 45"

1 1. After the grout has reached an initial set (the grout can be cut with
a steel trowel and will stand up without support), it should be
trimmed back to the level indicated on the drawings.

12. Grout should be cured according to the manufacturer's specifica-
tions and recommendations.