ASTM C637 − 14 Standard Specification for Aggregates for Radiation-Shielding Concrete

Scope of ASTM C637 − 14 Standard Specification for Aggregates for Radiation-Shielding Concrete

1.1 This specification covers special aggregates for use in radiation-shielding concretes in which composition or high specific gravity, or both, are of prime consideration.

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 following precautionary caveat pertains only to the test method portion, Section 9, of this specification:

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 and health practices and determine the applicability of regulatory limitations prior to use

Classification of ASTM C637 − 14 Standard Specification for Aggregates for Radiation-Shielding Concrete

4.1 Aggregates covered by this specification include:

4.1.1 Natural mineral aggregates of either high density or high fixed water content, or both.

These include aggregates that contain or consist predominately of materials such as barite, magnetite, hematite, ilmenite, and serpentine.

4.1.2 Synthetic aggregates such as iron, steel, ferrophosphorus and boron frit or other boron compounds (see Descriptive Nomenclature C638).

4.1.3 Fine aggregate consisting of natural or manufactured sand including high-density minerals.

Coarse aggregate may consist of crushed ore, crushed stone, or synthetic products, or combinations or mixtures thereof.