1110-2-2000 and EM 1110-2-2002.
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2.1.1
Cement-Based Materials
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NOTE: See the appropriate concrete aggregates design
memorandum or thermal study to select the proper
requirements for cementitious materials options,
pozzolan, and silica fume and insert in the
referenced sections as applicable. Determination of
the type of cement, including optional physical and
chemical requirements, must be based on
consideration of environmental exposure, material
reactivity and heat of hydration
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Cementitious materials shall meet the requirements specified in Section [
03300A CAST-IN-PLACE STRUCTURAL CONCRETE][03301A CAST-IN-PLACE STRUCTURAL
CONCRETE FOR CIVIL WORKS][03307 CONCRETE FOR MINOR STRUCTURES].
2.1.1.1
Rapid-Hardening Repair Material
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NOTE: ASTM C 928 does not provide requirements for
for freeze-thaw durability, for sulphate exposure or
alkali reactivity. These materials should be used
only when the properties are needed, and then only
when a service record for the proposed material, in
the same environment, is available or when
Government testing is performed. Use the bracketed
requirements when necessary for the exposure. See
Table 1 in ASTM C 928 for properties of Type R1, R2
and R3.
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Prepackaged or site-mixed material: ASTM C 928, Type [R1] [R2] [R3], [with
Durability Factor of 50 or more when subjected to freezing and thawing in
accordance with ASTM C 666/C 666M, Procedure A] [and] [length change of not
more than [ ]% when tested for sulfate expansion in accordance with ASTM C
1012]. Use bonding agent as recommended by the manufacturer.
2.1.1.2
Ultra-fine Cement
Maximum particle size shall be less than 10 microns.
The ultra-fine cement
shall contain a dispersing agent.
2.1.2
Admixtures
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NOTE: High-range water reducers are only appropriate
for high slump (6"150 mm+) mixtures. Accelerating
or retarding admixtures should not be used unless
specific project requirements justify their use.
Accelerators may promote more cracking, and the
retarder may make the concrete susceptible to
damage, settlement, etc.
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SECTION 03931
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