2. High-Early-Strength Portland Cement: early-strength Portland Cement shall conform to the High- requirements of AiS.T.M. Designation C-150-47, Type III. d. Curing Materials: 1. Kraft Paper: Kraft paper shall conform 2, Quilts: Quilts shall conform to the to the requirements of Federal Specification UU-P-264, and shall be treated so as to possess & strength when wet that will afford good resistance to scuffing and shrinkage. requirements of Federal Specification DDD-M-148. | Quality. 3. Burlap: Burlap shall be of commercial Burlap may be used only for unexposed concrete surfaces and when used shall be in not less than 2 layers. 4, Membrane Curing Compounds: Membrane curing compounds shall be used as specified in para- graph 5-26b, 2. e. Premolded Joint Filler Strips: Premolded joint filler strips shall conform to the requirements of Federal Specification HH-F-334, of sizes indicated on the drawings. f. Forms: Forms shall be of wood, metal or other material as approved by the Engineer. 1. Wood Forms: (a) Unexposed Concrete Surfaces: (b) Exposed Concrete Surfaces: Wood forms for unexposed concrete surfaces shall be No. 2 Common or better lumber. Wood forms for exposed surfaces shall be dressed-and-matched boards of uniform thickness, and width not exceeding 10 inches. (c) Smooth Surfaces: Wood forms for Smooth concrete surfaces shall be of plywood or shall have a form lining as specified below. 2. Plywood: Plywood for forms shall conform to the requirements of U. 5-3 3. Commercial Standard