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ASTM C618-23e1
Standard Specification for Coal Ash and Raw or Calcined Natural Pozzolan for Use in Concrete (Includes all amendments and changes 3/21/2023).
Přeložit název
NORMA vydána dne 1.3.2023
Informace o normě:
Označení normy: ASTM C618-23e1
Datum vydání normy: 1.3.2023
Kód zboží: NS-1136280
Počet stran: 5
Přibližná hmotnost: 15 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM C618-23e1 :
This specification covers coal fly ash and raw or calcined natural pozzolan for use in concrete where cementitious or pozzolanic action, or both, is desired, or where other properties normally attributed to fly ash or pozzolans may be desired, or where both objectives are to be achieved. Fly ash and natural pozzolans shall conform to the prescribed chemical composition requirements and physical requirements. The materials shall be tested for fineness, strength activity index, water requirement, soundness, and autoclave expansion or contraction.
Keywords:
bottom ash, coal ash, fly ash, harvested coal ash, natural pozzolan,, ICS Number Code 91.100.30 (Concrete and concrete products)
Doplňující informace
| 1. Scope | ||||
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1.1?This specification covers coal ash resulting from the combustion of coal, and raw or calcined natural pozzolan, for use in concrete where cementitious or pozzolanic action, or both, is desired, or where other properties normally attributed to coal ash or natural pozzolans may be desired, or where both objectives are to be achieved. Note 1:?Finely divided materials may tend to reduce the
entrained air content of concrete. Hence, if a coal ash or natural
pozzolan is added to any concrete for which entrainment of air is
specified, provision should be made to ensure that the specified
air content is maintained by air content tests and by use of
additional air-entraining admixture or use of an air-entraining
admixture in combination with air-entraining hydraulic
cement.
1.2?The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3?The text of this standard references notes and footnotes, which provide explanatory information. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 1.4?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||
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