reason to reduce the cementitious material content unless used in mixture
proportioning studies.]
2.1.2.4
[Water-Reducing Admixture
A water-reducing admixture shall meet the requirements of ASTM C 494/C 494M,
Type A [or D], except that the 6-month and 1-year compressive strength
tests are waived. The admixture may be added to the concrete mixture only
when its use is approved or directed and after mixture proportioning
studies.]
2.1.2.5
[High-Range Water-Reducing Admixture (HRWRA)
High-range water-reducing admixture shall meet the requirements of ASTM C
494/C 494M, Type F [or G], except the 6-month and 1-year strength
requirements shall be waived. The admixture may be used only after mixture
proportioning studies and when approved.] [The Contractor shall provide
the services of a manufacturer's technical representative experienced in
mixture proportioning and placement procedures of concrete containing
HRWRA. The technical representative shall be available for consultation
during mixture proportioning and shall be on-site for the first placement
of concrete containing HRWRA.]
2.1.2.6
[Expansive Admixture
**************************************************************************
NOTE: Delete this paragraph and paragraph BLOCK-OUT
CONCRETE in Part 3 if block-out concrete is not used.
**************************************************************************
Expansive admixture used in block-out concrete shall conform to ASTM C 937.]
2.1.3
Curing Materials
2.1.3.1
[Sheet Materials
Sheet curing materials shall conform to ASTM C 171, type optional, except
polyethylene sheet shall not be used.]
2.1.3.2
Membrane-Forming Curing Compound
Membrane-forming curing compound shall conform to ASTM C 309, Type 1D or 2,
except a styrene acrylate or chlorinated rubber compound meeting ASTM C 309,
Class B, requirements may be used for surfaces that are to be painted or
are to receive subsequent coatings, or floors that are to receive adhesive
applications of resilient flooring. The curing compound selected shall be
compatible with any subsequent paint, roofing, coating, or flooring
specified.
2.1.3.3
Burlap
Burlap
for curing purposes shall conform to COE CRD-C 318.
2.1.4
Water
Water for washing aggregates and for mixing and curing concrete shall be
free from injurious amounts of oil, acid, salt, alkali, organic matter, or
other deleterious substances and shall comply with COE CRD-C 400.
SECTION 03700
Page 37
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