form and of suitable concentration for easy, accurate control of dispensing.
2.3.1
Air-Entraining Admixture
ASTM C 260 and shall consistently entrain the air content in the specified
ranges under field conditions.
2.3.2
Accelerating Admixture
ASTM C 494/C 494M, Type C or E, except that calcium chloride or admixtures
containing calcium chloride shall not be used.
2.3.3
Water-Reducing or Retarding Admixture
ASTM C 494/C 494M, Type A, B, or D, except that the 6-month and 1-year
compressive and flexural strength tests are waived.
2.3.4
High-Range Water Reducer
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NOTE: Use this paragraph only when high-range water
reducing admixture is allowed in paragraph SLUMP in
PART 1.
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ASTM C 494/C 494M, Type F or G, except that the 6-month and 1-year strength
requirements are waived. The admixture shall be used only when approved in
writing, such approval being contingent upon particular mixture control as
described in the Contractor's Quality Control Plan and upon performance of
separate mixture design studies.
2.3.5
Surface Retarder
COE CRD-C 94.
2.3.6
Expanding Admixture
Aluminum powder type expanding admixture conforming to ASTM C 937.
2.3.7
Other Chemical Admixtures
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NOTE: Use this paragraph only when a plasticizing
admixture is allowed in paragraph SLUMP in PART 1.
**************************************************************************
Chemical admixtures for use in producing flowing concrete shall comply with
ASTM C 1017/C 1017M, Type I or II. These admixtures shall be used only
when approved in writing, such approval being contingent upon particular
mixture control as described in the Contractor's Quality Control Plan and
upon performance of separate mixture design studies.
2.4
CURING MATERIALS
2.4.1
Impervious-Sheet
Impervious-sheet materials shall conform to ASTM C 171, type optional,
except, that polyethylene sheet shall not be used.
SECTION 03300A
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