This method covers procedures for making and curing cylinder and beam specimens from representative samples of fresh concrete for a construction project. The concrete used to make the molded specimens shall be sampled after all on-site adjustments have been made to the mixture proportions@ including the addition of mix water and admixtures. This practice is not satisfactory for making specimens from concrete not having measurable slump or requiring other sizes or shapes of specimens. The values stated in SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore@ each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. This standard does not purport to address all of the safety concerns@ if any@ associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Warning??Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to exposed skin and tissue upon prolonged exposure. The text of this standard references notes that provide explanatory material. These notes shall not be considered as requirements of the standard.
T 23-2018 history
2023T/CIET 23-2023 Sintered NdFeB magnets for drive motors of new energy vehicles
2020T/CAMMT 23-2020 Quality management systems - Certification requirements for additive manufacturing service providers
2018T 23-2018 Standard Method of Test for Making and Curing Concrete Test Specimens in the Field
2017T 23-2017 Standard Method of Test for Making and Curing Concrete Test Specimens in the Field
2014T 23-2014 Standard Method of Test for Making and Curing Concrete Test Specimens in the Field
2013T 23-2013 Standard Method of Test for Making and Curing Concrete Test Specimens in the Field
2008T 23-2008 Standard Method of Test for Making and Curing Concrete Test Specimens in the Field
2004T 23-2004 Standard Method of Test for Making and Curing Concrete Test Specimens in the Field
2002T 23-2002 Standard Method of Test for Making and Curing Concrete Test Specimens in the Field (ASTM Designation: C 31-00)
1999TB/T 23-1999 Dustproof plugs and chains for rolling stock
1997T 23-1997 Standard Method of Test for Making and Curing Concrete Test Specimens in the Field (Twentieth Edition; ASTM C 31-95)
1993T 23-1993 Standard Specification for Making and Curing Concrete Test Specimens in the Field (Eighteenth Edition; ASTM C 31-90a)