2010 Construction and Material Specifications - Ohio Department of ...

613.04
Type 1 [1] Type 2 Type 3
lb/yd 3 kg/m 3 lb/yd 3 kg/m 3 lb/yd 3 kg/m 3
Cement 50 30 100 59 0 0
Fly Ash, Class F 250 148
[2] [2]
1500 890
Fly Ash, Class C [4]
0 0 0 0 297 297
Fine Aggregate [3] 2910 1726 2420 1436 0 0
Water (Target) 500 297 210-300 125-178 850 504
[1] The Contractor may add an air-entraining agent specifically designed for the use
in the low strength mortar mixture.
[2] Entrained air is substituted for fly ash in this mix. (Approximately 25 percent)
[3] Saturated Surface Dry
[4] Class C Fly Ash may be substituted for Class F Fly ash in Type 1 mixes with an
approved mix design meeting the alternate mix design criteria of this
specification.
These mixtures of materials are expected to yield approximately 1 cubic yard (1
m 3 ) of material of a flowable consistency. Make small adjustments, as necessary,
in the amounts of the materials in a mix to achieve the final product.
613.04 Mix Adjustment. Make one or more 1 cubic yard (1 m 3 ) trial batches
at different water contents to ensure a flowable material. The mixture is too dry if
cracks develop in the mixture as it flows into place.
Adjust the proportions to maintain the total absolute volume. For large
adjustments, see 613.05.
In order to expedite the settlement of a Type 1 mixture without entrained air,
bleed water may appear on the surface immediately after the material is struck off.
A delay in bleeding indicates there are too many fines in the mixture. The
Contractor may reduce the fly ash quantity in increments of 50 pounds (30 kg)
until the mixture is bleeding freely. Add approximately 60 pounds (36 kg) of sand
to replace each 50 pounds (30 kg) increment of fly ash to maintain the original
yield.
613.05 Alternate Mixes. The Contractor may submit alternate mixes for
approval. Furnish the mix design and test data from an independent test laboratory
30 days before the intended usage for approval.
Submit an alternate mix design for all mixes that:
A. Vary more than 300 pounds (178 kg) in fine aggregate, 100 pounds (59 kg)
in water, 20 pounds (12 kg) in cement, or 200 pounds (119 kg) in fly ash from the
613.03 mixes. These are considered large adjustments.
B. Have less than 50 pounds (30 kg) of cement in the Type 1 mixes or less than
100 pounds (59 kg) of cement in the Type 2 mixes.
C. Use alternate materials.
D. Contain foundry sand.
E. Contain fly ash not conforming to 701.13.
F. Use fine aggregate gradations other than 703.05.
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