NOTE: Refer to EM 1110-2-2000 for direction on
class of finish. Please note that definitions for
class of finish have been changed recently. Class
of finish shall also be shown in the drawings.
Paragraph CONSTRUCTION TOLERANCES presents surface
tolerances. Section 03101A FORMWORK FOR CONCRETE
presents materials for each class.
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After removal of forms, all ridges, lips, and bulges on surfaces
permanently exposed shall be removed. All repairs shall be completed
within 48 hours after form removal.
3.4.2.1
Classes A, A-HV, & B Finishes
Surfaces listed in Section 03101A FORMWORK FOR CONCRETE, paragraph [_____],
and as shown in the drawings to have classes A, A-HV, and B finishes, shall
have surface defects repaired as follows: defective areas, voids, and
honeycombs smaller than 10 000 square mm 16 square inches in area and less
than 13 mm 1/2 inches deep; bug holes exceeding 13 mm 1/2 inch in diameter
shall be chipped and filled with dry-packed mortar; holes left by removal
of tie rods shall be reamed and filled with the below specified material;
defective and unsound concrete areas larger than described shall be defined
by 13 mm 1/2 inch deep dovetailed saw cuts in a rectangular pattern with
lines parallel to the formwork, the defective concrete removed by chipping
and the void repaired with replacement concrete. The prepared area shall
be brush-coated with an epoxy resin meeting the requirements of ASTM C
881/C 881M, Type V; a latex bonding agent meeting the requirements of ASTM
C 1059, Type II; or a neat cement grout after dampening the area with
water. The void shall be filled with replacement concrete in accordance
with the paragraph MATERIAL AND PROCEDURE FOR REPAIRS.
3.4.2.2
Class C Finish
Surfaces listed in Section 03101A FORMWORK FOR CONCRETE, paragraph [_____],
and as shown in the drawings, shall have defects repaired as follows:
defective areas, voids, and honeycombs smaller than 15 000 square mm 24
square inches and less than 50 mm 2 inches deep; bug holes exceeding 38 mm
1-1/2 inches in diameter shall be chipped and filled with dry-packed
mortar; and holes left by removal of the tie rods shall be reamed and
filled with dry-packed mortar. Defective and unsound concrete areas larger
than 15,000 square mm 24 square inches and deeper than 38 mm 1-1/2 inches
shall be defined by 13 mm 1/2 inch deep dovetailed saw cuts in a
rectangular pattern, the defective concrete removed by chipping, and the
void repaired with replacement concrete. The prepared area shall be
brush-coated with an epoxy resin meeting the requirements of ASTM C 881/C
881M, Type V; a latex bonding agent meeting the requirements of ASTM C 1059,
Type II; or a neat cement grout after dampening the area with water. The
void shall be filled with replacement concrete in accordance with the
paragraph MATERIAL AND PROCEDURE FOR REPAIRS.
3.4.2.3
Class D Finish
Surfaces listed in Section 03101A FORMWORK FOR CONCRETE, paragraph [_____],
and as shown in the drawings to have class D finish, shall have surface
defects repaired as follows: defective areas, voids, and honeycombs
greater than 30,000 square mm 48 square inches in area or more than 50 mm 2
inches deep shall be defined by 13 mm 1/2 inch deep dovetailed saw cuts in
a rectangular pattern, the defective concrete removed by chipping and the
SECTION 03700
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