ceramically bonded together to form a homogeneous material sufficiently
porous to provide a good bond with portland paste; or factory-graded emery
aggregate consisting of not less than 45 percent aluminum oxide and 25
percent ferric oxide. The aggregate shall be well graded from particles
retained on the 600-m (No. 30) sieve to particles passing the 2.36-mm (No.
8) sieve.
2.1.8
conform to ASTM C 1059.
2.1.9
Epoxy Resin
Epoxy resin for use in repairs shall conform to ASTM C 881/C 881M, Type
III, Grade I or II.
2.2
CONCRETE MIXTURE PROPORTIONING
2.2.1
Quality of Mixture
For each portion of the structure, mixture proportions shall be selected so
that the strength and W/C requirements listed in paragraph DESIGN
REQUIREMENTS are met.
2.2.2
Nominal Maximum-Size Coarse Aggregate
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NOTE: Consult the appropriate DM for the nominal
maximum-size aggregate.
**************************************************************************
Nominal maximum-size coarse aggregate shall be [37.5 mm 1-1/2 inch] [25.0
mm 1 inch] inches except 19.0 mm 3/4 inch nominal maximum-size coarse
aggregate shall be used when any of the following conditions exist: the
narrowest dimension between sides of forms is less than 190 mm 7-1/2 inches,
the depth of the slab is less than 100 mm 4 inches, or the minimum clear
spacing between reinforcing is less than 55 mm 2-1/4 inches.
2.2.3
Air Content
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NOTE: For a specified compressive strength (f'c) of
34.5 MPa (5,000 psi) or greater the air content may
be reduced by 1.0 percent.
**************************************************************************
Air content as delivered to the forms and as determined by ASTM C 231 shall
be between 4 and 7 percent except that when the nominal maximum-size coarse
aggregate is 19.0 mm 3/4 inch, it shall be between 4-1/2 and 7-1/2 percent.
2.2.4
Slump
**************************************************************************
NOTE: Consult the appropriate DM and or the
Materials Engineer to fill in the blank and to use
the optional sentence.
**************************************************************************
SECTION 03301A
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