12/1/03
50.1
SECTION 50
CONSTRUCTION MATERIALS
This Section indicates the requirements for various classes and types of materials used in
construction. Materials not included in this Section shall be as described and specified in other
Sections of these Specifications or in the Special Provisions.
50-1 PORTLAND CEMENT
Unless otherwise specified in the Special Provisions, all cement used in concrete shall
conform to ASTM Designation: C 150, Type II.
Type III portland cement may be substituted for Type II when Special Provisions require
high early strength.
All portland cements shall be "low alkali", containing not more than 0.60 percent by weight of
alkalis, calculated as the percentage of Na
2
O plus 0.658 times the percentage of K
2
O.
Unless otherwise specified in the Special Provisions, calcium chloride shall not be used in
any concrete containing steel reinforcement or other embedded metals.
When directed by the Agency, the Contractor shall furnish certificates of compliance stating
that the cement delivered to the work complies with these Specifications.
50-2 CONCRETE AGGREGATES
Unless otherwise specified in the Special Provisions, concrete aggregates shall conform to
ASTM Designation: C 33, except that grading requirements shall be as specified in Section
90-3, “Aggregate Gradings”, of the State Specifications.
50-3 WATER FOR CONCRETE
Water used for mixing and curing concrete shall be clean, free from oil, acid, alkalis,
vegetable matter, or other deleterious matter. No water containing excessive amounts of salts,
sulfates, or chlorides shall be used.
50-4 PREMOULDED EXPANSION JOINT FILLER
Unless otherwise specified in the Special Provisions, premoulded expansion joint filler
material shall conform to ASTM Designation: D 1751.
50-5 PORTLAND CEMENT CONCRETE
50-5.01 Composition
Portland cement concrete shall be composed of portland cement, fine aggregate, coarse
aggregate, admixtures (if used) and water; and shall be designated as one of the following
classes:
Class "A-1" Concrete—Shall contain six (6) sacks (564 pounds) of portland cement per
cubic yard and shall have a maximum size of coarse aggregate of either one inch (1”) or
one and one-half inches (1-1/2”).
Class "A-2" Concrete—Shall contain six (6) sacks (564 pounds) of portland cement per
cubic yard and shall have a maximum size of coarse aggregate of three-quarters inch
(3/4”).



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