Fairbanks 12-1492 - 12-1496 A.A.R. Combination Railroad Track/MTS - Manual (Page 36)

04/12 36 50538 Rev. 7
2-Q: Grouting Load Cell Baseplates:
Grout becomes the base which supports the entire structure. Grout MUST be fully supporting
the stands and plates with NO gaps or spaces. A good method is to build the forms slightly
bigger than the stand 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 ability for the grout mix to bond with the pier.
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 8000 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 8000 psi per the grout manufacturers instruction.
2. Surface preparation:
• Surfaces to be grouted shall be prepared in accordance with the manufacturers instructions.
• 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.