[Ord. No. 10-2018, 19, passed 3-5-2019]
The portland cement shall meet ASTM C-150 specifications. Minimum
cement content is 560 pounds per cubic yard. Type IIA shall be used.
[Ord. No. 10-2018, 19, passed 3-5-2019]
Fine aggregate shall consist of sand, clean and free from clay,
vegetation and other deleterious substances. It shall be composed
of hard, durable and inert grains. Stone dust is not considered as
a suitable material for fine aggregate. In order to avoid misunderstanding,
no stone dust will be allowed on the job during construction of curb.
All fine aggregate material shall meet the requirements specified
in PennDOT's Publication 408, Specifications (latest revision),
Section 703, for natural sand, Type A.
[Ord. No. 10-2018, 19, passed 3-5-2019]
Coarse aggregate shall be hard, tough, durable and uncoated
inert stone particles reasonably free from clay, silt, vegetation
and other deleterious substances. Stone shall be free from slate texture
or cleavage planes. Coarse aggregate shall conform to the requirements
of PennDOT No. 2B stone (AASHTO No. 5), as specified in PennDOT's
Publication 408, Specifications (latest revision), Section 703.
[Ord. No. 10-2018, 19, passed 3-5-2019]
All concrete used shall be ready-mixed and conform to PennDOT's
Publication 408, Specifications (latest revision) for air-entrained
Class A concrete and shall have a minimum compressive strength of
3,000 psi after 28 days unless otherwise specified herein. The concrete
shall be proportioned at a ready-mix plant and transported to the
project in a truck agitator or mixer operated at an agitation speed
in accordance with ASTM C-941. All concrete shall be supplied from
a PennDOT-approved source unless otherwise approved by the Engineer
prior to use. Concrete obtained from any source which is not on the
PennDOT approved producer list may be tested to determine its suitability
at the sole expense of the permittee. For projects with more than
three cubic yards of concrete, permittees shall provide one of the
following: a material ticket, a mix design or a cylinder break from
a lab for final acceptance. All concrete shall be white in color unless
approved by the Engineer.
[Ord. No. 10-2018, 19, passed 3-5-2019]
Site-mixed concrete is permitted for projects that require one
cubic yard or less of concrete. Metered concrete from mobile batch
trucks is permitted for projects that require more than one cubic
yard of concrete. Site-mixed concrete shall consist of one part cement,
two parts fine aggregate and three parts coarse aggregate. This composition
shall be thoroughly mixed with sufficient water to obtain a workable
mixture, but not to exceed 5.3 gallons per bag of cement. For each
cubic yard of concrete, use 6.75 to 8.00 bags of cement. All concrete
shall be white in color unless approved by the Engineer.
[Ord. No. 10-2018, 19, passed 3-5-2019]
All new concrete shall be coated with a suitable sealer within
30 days after final finish with Kure-N-Seal™ WB, or approved equal. A second coat shall be applied when the first
coat dries.
[Ord. No. 10-2018, 19, passed 3-5-2019]
Any and all tests of materials required by the Engineer shall
be performed by a testing laboratory approved by the Engineer, at
the expense of the permittee. At least one complete material test
is required for every 30 cubic yards of cement concrete placed and
every 20 cubic yards placed thereafter. All materials found to be
unsuitable must be immediately removed from the job site. The permittee
shall provide a slump cone at the job site and perform a minimum of
one slump test per each day cement concrete is placed, in the presence
of the Engineer. The acceptable slump range is one to four inches.
The contractor shall provide all delivery slips of materials as directed
by the Engineer.
