Significance and Use
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 fly ash or natural pozzolan results in an acceptable level of strength development when used with hydraulic cement in concrete. Since the test is performed with mortar, the results may not provide a direct correlation of how the fly ash or natural pozzolan will contribute to strength in concrete.
Scope
1.1 These test methods cover procedures for sampling and testing fly ash and raw or calcined pozzolans for use in portland-cement concrete.
1.2 The procedures appear in the following order:
|
| Sections |
| Sampling | |
| CHEMICAL ANALYSIS | |
| Reagents and apparatus | |
| Moisture content | |
| Loss on ignition | |
| Silicon dioxide, aluminum oxide, iron oxide, calcium oxide,  magnesium oxide, sulfur trioxide, sodium oxide | |
| Available alkali | |
| Ammonia | |
| PHYSICAL TESTS | |
| Density | |
| Fineness | |
| Increase of drying shrinkage of mortar bars | |
| Soundness | |
| Air-entrainment of mortar | |
| Strength activity index with portland cement | |
| Water requirement | |
| Effectiveness of Fly Ash or Natural Pozzolan in | |
| Effectiveness of Fly Ash or Natural Pozzolan in | |
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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
