Humboldt H-2952 Vertical Cylinder Capper - Manual (Page 3)

Capping Instructions:
1. Melt HUMBOLDT H-2959 Capping Compound in a melting pot up to about 210°F.
Pouring temperature of H-2959 is between 265° and 290°F. Use of HUMBOLDT
H-2953 Compound Melting Pot is recommended.
CAUTION:- DO NOT OVERHEAT or excessive fumes and odor will result.
2. Oil or grease the capping plate lightly to facilitate removal of specimen from plate,
and place the plate directly under the vertical uprights of Cylinder Capper.
3. Brush and dislodge any loose or adhering particles from the end of concrete cylinder
which is to be capped. This insures a good bond between cap and specimen and
eliminates formation of "pockets" in the cap.
4. Pour a sufficient amount of Capping Compound to cover the depressed circular
portion of the Capping plate. One ladle of compound will suffice.
5. Without touching the capping plate, fit the concrete cylinder against the Capper
upright and lower until bottom end of specimen is firmly seated on the capping
plate. This must be done with least loss of time, since the capping compound
has a very fast rate of set.
6. Allow the capping compound to set.
7. Remove specimen after the compound has set and trim off any excess material
from the specimen.
8. Cap the opposite end of the specimen using the same method.
9. Excess capping material from the plate and specimen can be re-used.
NOTE:- Following a compression test on the concrete specimen, the cap from the
tested specimen can be re-used. The cap can be removed by tapping gently with
a Hammer. Care should be taken to ensure that no foreign material adheres to the
reclaimed cap.