History of Masonry Mortar in America 1720-1995 documents the last 275 years of the evolution of ingredients. The book assists architects and builders in modern times to match mortar formulations when they are engaged in work that requires authentic replication of original material for the restoration of historic masonry buildings. This edition features the history of natural cement, ca. 1820s; historic Portland cement, ca. 1870s; and the beginning of the American Society of Testing Materials (ASTM) in 1902 and the resistance to its formation. Information on the new ASTM C1713-10 Standard Specification for Mortars for the Repair of Historic Masonry is also included at the back of the book.
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