![]() ![]() Major advances in communication and transportation were taking place in a country that in the late 1890s consisted of 45 states. The world and, more specifically, the United States was in the midst of the second phase of the Industrial Revolution. The true beginning of ASTM coincided with the Spanish-American War fought in 1898. ![]() The time period involved is between the American Civil War, which ended in 1865, and World War I, which began in 1914. Getting a view of ASTM from its conception takes us back more than a century. User's Guide to ASTM Specification C94 for Ready-Mixed Concrete MNL49Preface What is ASTM? To fully understand ASTM C 94/C 94M, Specification for Ready-Mixed Concrete, it is necessary to understand ASTM and the consensus process for developing standards such as ASTM C 94/C 94M. ![]()
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