C311/c311m (version 25)

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.