Tiêu chuẩn quốc tế
Số hiệu
Standard Number
AASHTO M 295:2019
Năm ban hành 2019
Publication date
Tình trạng
A - Còn hiệu lực
Status |
Tên tiếng việt
Title in Vietnamese Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
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Tên tiếng anh
Title in English Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
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Thay thế cho
Replace AASHTO M 295:2011
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Lịch sử soát xét
History of version
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Số trang
Page 6
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Phạm vi áp dụng
Scope of standard 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 finely divided coal fly ash and raw or calcined 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 fly 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. The values stated in SI units are to be regarded as the standard. |