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: 872 MATERIAL SUBSECTION Air Entraining Admixture 707.1 Cement 701.1 Coarse Aggregate 703.1, 703.2, or 703.3 Expansion Joint Filler Preformed 708.1 Fine Aggregate 702,1 Joint Sealing Material 708.3 Reinforcing Steel 709.1 and 709.4 Water 715.7 Sampling and testing of materials shall be in accordance with the minimum frequency stated in MP 603.02.10.
715.22.3 Proportioning: Concrete shall be in proportion to meet the following
requirements:
i.The minimum cement factor shall be seven sacks per cubic yard of concrete. ii. The maximum water content shall be five gallons per sack of cement. iii. The amount of entrained air in the plastic concrete shall be seven plus or minus two percentage points. iv. The consistency shall be such as to allo w proper placement, consolidation, and finishing.
715.22.4 Placing and Curing: Concrete shall be placed in forms designed to conform to
the lengths, shapes and other details of the median barrier shown on the Plans. Curing shall be in accordance with the applicable requirements of 601.
715.22.5 Finishing: The surface of the barrier shall be smooth and free from air bubble
pockets, depressions, and honeycombs. When the barriers are removed from the forms, any surface imperfections present shall be repaired in accordance with the requirements of 601.11.1 -Class I, Ordinary Surface Finish.
715.23 Gabions :
Welded wire fabric gabions shall conform to ASTM A974 and non -welded (twisted) wire mesh gabions shall conform to ASTM A975. Additionally, the use of fasten er rings in the assembly of the gabion baskets may be permitted by the Engineer, providing the rings have at least the same tensile strength, zinc coating, and size as the wire used in the body of the gabion.
715.24 Matting for Erosion Control :
715.24.1 General: Matting for erosion control shall be commercially designed and
manufactured especially for the prevention of soil erosion. The matting used shall be recommended by the technic al representative for a manufacturer and approved by the Engineer after an evaluation of the site conditions has been made. The manufacturer shall provide installation instructions and attest that the proposed matting is well suited to the particular site to be protected. The matting shall be stabilized or manufactured in such a way that the physical integrity of the product is maintained throughout the intended life expectancy. The matting shall not effect
Source: West Virginia Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 893–894 of 1,006.