Work under this contract includes materials testing services frequently used on public works construction projects. This is an on-call contract, i.e. services are to be provided on an asneeded basis when requested by the Town. “Concrete Field Inspection” are responsible for sampling the concrete at the point of placement, per the following Standards: a. Sampling - AASHTO T 141 b. Slump – ASTM/C143/AASHTO T 119 c. Temperature - AASHTO T 309 d. Air Content – ASTM C231/AASHTO T 152 or AASHTO T 196 e. Making and Curing Concrete Test Specimens in the Field - AASHTO T 23. Project personnel are responsible for filling the cylinder molds, determining air content, temperature, and slump. Cylinders must be immediately placed where they can remain undisturbed for at least 24 hours. “Concrete Cylinders” includes the pickup, curing, compression testing and analytical reporting per the following Standards: a. Making & Curing Concrete Test Specimens - ASTM C39/AASHTO T22 “Gradation Analysis” includes the on-site collection, analytical testing and reporting of aggregate material, per the following Standards: a. Sampling – AASHTO T2 b. Dry Sieve Analysis – ASTM C136/AASHTO T27 c. Wet Sieve Analysis – AASHTO T11
