EPD: Masonry cement, C270, for Type N, Type S, Type M mortars (Argos USA Corp., Ash Grove Cement, Buzzi Unicem USA, Inc., CalPortland Company, CEMEX USA, Continental Cement, Drake Cement, Federal White Cement, GCC of America, LafargeHolcim, Lehigh Hanson, Martin Marietta Materials, Inc., Mitsubishi Cement Corporation, Monarch Cement Company, National Cement Group, Salt River Materials Group, St. Marys Cement, Suwannee American Cement, Titan America LLC)
The product under evaluation is masonry cement as defined by ASTM C219 and specified in ASTM C91 or CSA A3002. A hydraulic cement manufactured for use in mortars for masonry construction or in plasters, or both, which contains a plasticizing material and, possibly, other performance-enhancing addition(s). (ASTM C219) Type N—For use in preparation of Specification C270 Type N mortar without further addition of cements or hydrated lime, and for use in preparation of Specification C270 Type S or Type M mortar when cement is added in accordance with the requirements of C270. Type S—For use in preparation of Specification C270 Type S mortar without further addition of cements or hydrated lime. Type M—For use in preparation of Specification C270 Type M mortar without further addition of cements or hydrated lime. All cement products are composed of specific combinations of calcium, silica, iron and alumina and small amounts of additives to achieve a desired profile of properties (e.g., strength, color). Clinker, the principle intermediate manufactured product within cement production, is typically produced from a combination of ingredients, including limestone (for calcium), coupled with smaller quantities of materials such as clay, iron ore, and sand (as sources of alumina, iron, and silica, respectively). So common are these building blocks that a wide variety of raw materials are suitable sources, and some sources, such clay and fly ash, may provide multiple chemical components. Cement plants are increasingly turning to industrial byproducts that otherwise would be discarded, once completing detailed analyses to determine the effects of using a byproduct on the manufacturing process, cement performance and facility emissions. The U.S. industry average masonry cement, as found by this study, is 55.2% clinker by weight. Table 1 describes the cement’s composition by specific material resources.
USA