Initial curing for 24 hours - Within limits of ASTM C31 Condition Relative Strength (28-day) Cement A Cement B 60°F in water 100% (6080 psi) 100% (6090 psi) 60°F in air 92% 97% 80°F in water 89% 93% 80°F in air 81% 88% NRMCA study: Meininger, ASTM Cement Concrete & Aggregates, 1983 Average Effect: Water vs. Air +6.6% 60°F vs. Volume 1 includes standards A 6 through C 173. Volume 2 includes standards C 177 through D 870. Volume 3 includes standards D 882 through E 90. Volume 4 includes standards E 94 through G 155, as well as a comprehensive index by subject. More than 1300 standards are included from 40 volumes of the 81-volume Annual Book of ASTM Standards.
Product specifications. Many requirements are common to several specifications and are given in ASTM A 781/A 781M, ASTM A 703/A 703M, ASTM A 957, ASTM A 985, and ISO 4990. ASTM A 781/A 781M – 16 CASTINGS, STEEL AND ALLOY, COMMON REQUIREMENTS, FOR GENERAL INDUSTRIAL USE.
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