Page 28 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

Installation, Maintenance, and Repair of Horizontal Pumps 13

baseplates with solid sides and soleplates should be 1 in. above the
bottom of the baseplate or the underside of the soleplate. The out-
side top edge of the grout should be chamfered at 45".

3. Foundation anchor bolt sleeve should be filled with a nonbonding,
pliable material such as asphalt or silicone rubber molding com-
pound to prevent a water pocket around the anchor bolt.
4. A split hose or duct tape can be used around the exposed threads of
anchor bolts to prevent direct contact between the epoxy grout and
anchor bolts.

5. The foundation should be protected from the rain since it is impor-
tant that the foundation be clean and dry at the time of grouting.
Normal grouting temperature should be between 40" and 90°F.
Due to the accelerated rate of curing at high temperature, the shad-
ing of the foundation from summer sunlight for at least 24 hours
before and 48 hours after grouting may be required. In hot sum-
mer weather, it is preferable to place the grout during the after-
noon, so that the initial cure will occur during the cooler evening
hours.

In cold weather, the grouting materials (including the aggregate)
should be stored at a temperature above 70°F for 24 hours prior to
mixing. When the temperature is below 65"F, the grout manufac-
turer should be consulted before mixing and placing the grout.
However, for best results in cold weather, fabricate a temporary
shelter around the baseplate or soleplate to be grouted and pre-
warm the baseplate or soleplate and foundation. When prewarm-
ing the installation, use convection-type space heating equipment
and be careful not to overheat localized areas. Do not use radiant
heating or open steam. Radiant heating warms the grout upper sur-
face more than the lower surface. The grout surface therefore
cures in a thermally expanded state, and after dissipation of the
heat, produces stresses that tend to make the grout "curl-up," re-
sulting in cracks in the concrete at the foundation corners just be-
low the grout line.

6. Epoxy grout has a limited shelf life. Check the grout manufactur-
er's instructions prior to use.
7. Epoxy grout has a limited pot life. Check the grout manufacturer's
instructions prior to use.