[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.