CONCRETE MASONRY UNITS A. Shapes: Provide shapes indicated and as follows, with exposed surfaces matching exposed faces of adjacent units unless otherwise indicated. 1. Provide special shapes for lintels, corners, jambs, sashes, movement joints, headers, bonding, and other special conditions. 2. Provide square-edged units for outside corners unless otherwise indicated. B. Integral Water Repellent: Provide units made with integral water repellent for exposed units. 1. Integral Water Repellent: Liquid polymeric, integral water-repellent admixture that does not reduce flexural bond strength. Units made with integral water repellent, when tested according to ASTM E514/E514M as a wall assembly made with mortar containing integral water-repellent manufacturer's mortar additive, with test period extended to 24 hours, shall show no visible water or leaks on the back of test specimen. C. CMUs: ASTM C90. 1. Size (Width): Manufactured to dimensions 3/8 inch (10 mm) less than nominal dimensions. 2. Exposed Faces: Provide color and texture matching the range represented by Architect's sample. 3. Unit Compressive Strength: Provide units with minimum average net-area compressive strength of 3750 psi (25.86 MPa). 4. Size (Actual Dimensions): 7-5/8 inches (194 mm) by 7-5/8 inches (194 mm) by 15-5/8 inches (397 mm)] long. 5. Texture: Standard Smooth...
