Fairbanks 2000 SERIES Rocker Column Railroad Scale - Manual (Page 28)

03/10 28 50614 Rev. 5
2-J: Grouting the Grout plates:
Grout becomes the base which supports the entire structure. Grout MUST be fully supporting
the grout plates with NO gaps or spaces. A good method is to build the forms slightly bigger
than the plate to permit the pouring and the rising of the grout mixture. The pier should be
thoroughly saturated with clean water for a minimum of 4 hours. This will both prevent the dry
pier concrete from absorbing water from the mix as it is poured, and greatly enhance the abil-
ity for the grout mix to bond with the pier.
1.0" Min.
Grout
3"
Min.
Concrete Pier
Forms
(Typ.)
Forms
(Typ.) 3"
Min.
50614_31
1. Grout selection:
• Grout shall be precision, packaged dry, non-metallic, hydraulic, non-shrink, and non-
gaseous.
• Grout shall meet or exceed ASTM C-1107 and Corps of Engineers CRD-C621.
• Grout shall be bleed free and attain a minimum of 5000 psi compressive strength in 28 days
at flowable consistency.
• Grout MUST be mixed to a flowable consistency as specified by the grout manufacturer.
• Do not permit any loads upon the scale until the grout has reached the compressive
strength of 2500 psi per the grout manufacturers instruction.
2. Surface preparation:
• Surfaces to be grouted shall be free of loose debris, grease, oil and other contaminant’s.
• Contaminant’s shall be removed using caustic soda or other approved concrete cleaners.
• All surfaces shall be flushed with clean water.
• Prior to pouring, all surfaces should be saturated with clean water for a minimum of 4 hours.
3. Forming:
• Forming must be completed and installed before starting to pour grout.
• Forms shall be slightly larger (three to four inches) than the dimension of the grout plates.
• Forms shall be of sufficient strength, anchored properly, and sealed. Seal with caulk and
use a form release agent on forms if required. Leave access for pouring grout in a convenient
place.
4. Mixing and Pouring:
• Mix grout per instructions on bag until a very smooth, pourable mix is obtained. Be sure you
mix enough quantity for the form you are filling.
• If necessary, use a large funnel or cone to direct mix into form and under stands.