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DATA SHEET 3600-805
805 Construction Grout – Winter Grade
Grouting in cold weather is even more hazardous than normal concrete placement operations. This is because the fresh grout is usually placed in relatively thin layers, two or three inches thick, and is in direct contact with cold steel and/or cold foundation concrete. Some warmth is necessary for Portland cement to set but any heat generated by the grout is immediately robbed by these cold confining surfaces. Extremely retarded set, slow strength gain and the possibility of frozen grout can be the result.
Some heating and protection is still required with this product, but such extras are minimized.
Using 805 Construction Grout – Winter Grade involves working within a time framework of 24 hours during which some external heating measures are required, depending on the severity of the weather. After this period however, the flowable 805 Construction Grout – Winter Grade will have developed sufficient strength for structural purposes and is in no danger of freezing at later dates.
25 Kg multi-all paper bags
Strength gain of flowable grout – 2″ cubes confined (CRD-C621 on 140% flow value).
Cast & Cured
Cast & Cured
Flowable grout consistency – use approximately 1.1 – 1.2 gal (4 – 4.5 L) of water per 25 kg bag
Dry pack consistency – use only sufficient water to produce a coherent ball when squeezed tightly in the hand. Sprinkle water over dry mixture and work in with a shovel. Mixed grout must be rammed in place with a hardwood or metal tool.
Strength gain of dry pack grout – this will depend on the availability of the laborer to create the proper consistency and to ram the grout effectively in place. Mixed and placed in a workman-like fashion, the dry pack grout will exceed the strength of the flowable mix given above.
Grouting in Late Fall
Temperatures for a 24-hour period are below freezing but NOT below 20°F (-6.7°C)
Remove ice and snow and warm the steel base plate and foundation concrete using a propane torch just prior to grouting.
Heat mixing water in a drum container heated by a torch or a fire.
Pour Grout in place and immediately cover with fiberglass insulating bats or straw.
Grouting in Winter [Temperatures are below 20°F (-6.7°C)
Bring the area to be grouted up to above freezing and keep it there for 24 hours. Follow sequence above.