ProMasonry High Strength Concrete is a blend of Portland cement, sand and stone, designed for professional use. All ProMasonry products are processed through precision blending equipment to ensure a consistent product of superior quality. SUGGESTED USESFootings, foundations, steps, sidewalks, post holes, patios, floor slabs, or general concrete applications where a thickness of greater than 2 inches is required. PREPARATIONCompact and moisten the base material. Place forms and reinforcing steel as needed. When repairing concrete, remove all loose and/or deteriorated material as well as any surface contaminants such as oil, paint, grease, etc. MIXINGEmpty the contents of the bag into a clean wheelbarrow, mortar box, mechanical mixer or other mixing vessel. Form a crater with a shovel or hoe in the center of the dry mix. Pour the recommended 3.5 quarts (3.3 L)of clean potable water into the crater. CautionAn excessive amount of water will weaken the mix and can result in cracking. Add small quantities, 1 pint (0.5 L) or less, of water and thoroughly mix to reduce stiffness. For hand mixingBlend dry mix with a shovel or hoe from the outer edges working the material towards the center. Continue mixing until all free water is used and all the aggregate is uniformly coated with cement. For mechanical mixingMix the material for three minutes. PLACEMENTPlace material until it slightly overfills the forms. Consolidate to remove any voids by using manual or mechanical vibration. Strikeoff with a screed or straight edge board. FINISHINGAllow bleedwater to evaporate before finishing. Use a float to achieve a smooth finish or a broom for a rougher surface. Caution - Overworking could weaken the surface and result in cracking, dusting or scaling. CURINGDampen with a fine mist of water for 24 hours or moist cure with wet burlap and polyethylene. Alternatively, apply ProMasonry Cure & Seal. Protect from direct sunlight, wind, rain and frost during the curing period. CLEAN UPClean tools and equipment with water immediately after use. Cured material will need to be mechanically removed. ProMasonry High Strength Concrete meets or exceeds ASTM C387 specification for compressive strengths when used as directed. TECHNICAL DATA Physical state and appearance :Dry powder with aggregate Base:Portland cement pH:Wet mix >12 Aggregate type:Concrete sand with 3/8 inch pea stone Slump:(ASTM C143)2 inch (50 mm) - 3 inch (76 mm) @ 3.5 quarts (3.3 L ) - water/bag Compressive strengths - psi:(ASTM C387)7 Days 2,700 (18.6 MPa)28 Days 4,000 (27.6 MPa) YIELDOne 80 lb. (36.3 kg) bag yields approximately 0.6 cu ft (17.0 L ).
