871 715.16 -CLAY OR SHALE BRICK : Brick shall conform to the requirements of one of the following Specifications: Sewer Brick ............................... AASHTO M 91, Grade SM or MM Sewer Brick ................................ ...... ASTM C32, Grade SM or MM Building Brick ................................ ..... AASHTO M 114, Grade SW Building Brick ................................ .............. ASTM C62, Grade SW
715.17 Concrete Brick :
Concrete brick shall conform to the requirements of ASTM C55; the grade shall be as specified on the Plans.
715.18 Concrete Masonry Units :
Hollow load -bearing concrete masonry units shall conform to the requirements of ASTM C90. The type and grade shall be as shown on the Plans. Solid preca st segmental concrete masonry units for construction of catch basins and manholes shall conform to the requirements of ASTM C139.
715.19 Precast Concrete Units for Manholes and Inlets :
Precast concrete units for manholes shall conform to the requirements in AASHTO M 199 and MP 604.02.40. In addition, air entrainment in the concrete shall be seven percent (7%) plus or minus two percent (2%) . Portland cement concrete for precast inlets s hall be in accordance with the applicable portions of the "Materials", "Manufacture" and "Physical Requirements" sections of AASHTO M 199, with the additional statement regarding compression tests to be included in the "Physical Requirements" section: "If no design strength is specified for precast concrete inlets, the minimum 28 -day compressive strength shall be considered to be the 3,200 psi (20 M pa) minimum cylinder strength." Also, for precast inlets, air entrainment in the concrete shall be seven per cent (7%) plus or minus two percent (2%) . Surface finish for precast inlets is not required, except, if resultant exposed surfaces have unsightly voids, flaking or other surface defects present, those imperfections shall be repaired in accordance with the requirements of 601.11.1 for Class 1, Ordinary Surface Finish.
715.20 through 715.21 : Blank
715.22 Precast Concrete Median Barriers (Permanent ):
715.22.1 Description: Precast median barriers shall conform to the shape and dimensions
shown on the Plans and shall meet the following requirements:
715.22.2 Materials: Materials shall meet the requirements specified in the following
Subsections of Division 700: