Concrete Repair and Installation District Wide 2023

Concrete Repair and Installation District Wide 2023 SCOPE: The scope of work must include, but is not limited to: General Specifications: Unless otherwise specified herein or shown on the Plans, all materials, procedures, and workmanship shall conform to the requirements of the MDOT 2013 Standard Specifications for construction. Construction Methods: o The sub-grade shall be formed by trenching or filling to the required elevation for bottom of concrete or to the bottom of the sub-base, if a sub-base is specified. The subgrade shall be thoroughly tamped or otherwise compacted. A minimum of four inches of Class A sand is required, and if not present be placed as sub-base. o Before concrete is placed, the sub-grade shall be thoroughly wetted so that the subgrade is uniformly moist, without forming wet or muddy spots. o Sub-base consisting of sand or sand gravel, shall be placed under the structure, to a 4 inch depth. o The forms shall be of wood or metal, straight and free from distortion, and of sufficient strength to resist springing during the process of depositing and finishing the concrete. The forms shall be the full depth of the concrete. They shall be set firmly on the subgrade, true to the required line and grade, and be held in place by adequate stakes, and shall be thoroughly clean and free from foreign material. Approved flexible steel or wood forms may be used for sharp curves or special sections. o Minimum thickness of the concrete are indicated on the drawings provided for each area to be replaced

Division 03 -

Concrete, Cast-in-Place Concrete.