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Standard Test Methods for Sampling and Testing Coal Ash or Natural Pozzolans for Use in Concrete
ASTM C311/C311M-25
Organization:
ASTM - ASTM International
Year: 2025
Abstract: 4.1 These test methods are used to develop data for comparison with the requirements of Specification C618 or Specification C1697. These test methods are based on standardized testing in the laboratory and are not intended to simulate job conditions. 4.1.1 Strength Activity Index—The test for strength activity index is used to determine whether coal ash or natural pozzolan results in an acceptable level of strength development when used in concrete. Since the test is performed with mortar, the results may not provide a direct correlation of how the coal ash or natural pozzolan will contribute to strength in concrete. 4.1.2 Chemical Tests—The chemical component determinations and the limits placed on each do not predict the performance of a coal ash or natural pozzolan in concrete, but collectively help describe composition and uniformity of the material.
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Standard Test Methods for Sampling and Testing Coal Ash or Natural Pozzolans for Use in Concrete
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| contributor author | ASTM - ASTM International | |
| date accessioned | 2025-09-30T19:22:14Z | |
| date available | 2025-09-30T19:22:14Z | |
| date copyright | 2025 | |
| date issued | 2025 | |
| identifier other | c0311_c0311m-25.pdf | |
| identifier uri | http://mapnamagz.yabesh.ir/std;query=autho1826AF67FCDCAC4/handle/yse/343098 | |
| description abstract | 4.1 These test methods are used to develop data for comparison with the requirements of Specification C618 or Specification C1697. These test methods are based on standardized testing in the laboratory and are not intended to simulate job conditions. 4.1.1 Strength Activity Index—The test for strength activity index is used to determine whether coal ash or natural pozzolan results in an acceptable level of strength development when used in concrete. Since the test is performed with mortar, the results may not provide a direct correlation of how the coal ash or natural pozzolan will contribute to strength in concrete. 4.1.2 Chemical Tests—The chemical component determinations and the limits placed on each do not predict the performance of a coal ash or natural pozzolan in concrete, but collectively help describe composition and uniformity of the material. | |
| language | English | |
| title | Standard Test Methods for Sampling and Testing Coal Ash or Natural Pozzolans for Use in Concrete | en |
| title | ASTM C311/C311M-25 | num |
| type | standard | |
| status | Active | |
| tree | ASTM - ASTM International:;2025 | |
| contenttype | fulltext | |
| scope | 1.1 These test methods cover procedures for sampling and testing coal ash and raw or calcined pozzolans for use in concrete. 1.2 The procedures appear in the following order: Sections Sampling 7 CHEMICAL ANALYSIS Reagents and apparatus 10 Moisture content 11 and 12 Loss on ignition 13 and 14 Silicon dioxide, aluminum oxide, iron oxide, calcium oxide, magnesium oxide, sulfur trioxide, sodium oxide and potassium oxide 15 Ammonia 16 PHYSICAL TESTS Density 17 Fineness 18 Increase of drying shrinkage of mortar bars 19 – 21 Air-entrainment of mortar 22 and 23 Strength activity index 24 – 27 Water requirement 28 Effectiveness of Coal Ash or Natural Pozzolan in Contributing to Sulfate Resistance 29 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. Note 1: Sieve size is identified by its standard designation in Specification E11. The alternative designation given in parentheses is for information only and does not represent a different standard sieve size. 1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 The text of this standard references notes and footnotes that provide explanatory information. These notes and footnotes (excluding those in tables) shall not be considered as requirements of this standard. 1.6 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. | |
| identifier DOI | 10.1520/C0311_C0311M-25 |