ASTM C Standard Specification for Lightweight Aggregates for Concrete Masonry Units. Lab ID: Use Evaluate lightweight materials intended for use in. ASTM C/CM: Standard Specification for Lightweight Aggregates for Concrete Masonry Units. ASTM C/CM Standard Specification for Lightweight Aggregates for Concrete Masonry Units. standard by ASTM International, 06/15/.

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ASTM C 331—05 Specification for Lightweight Aggregates for Concrete Masonry Units (PDF Download)

Aggregates can occur naturally fluvial or glacialindustrially produced like lightweight aggregates as well as recycled aggregates. From natural deposits, e. In Europe aggregates are defined in standard Asrm The aggregates shall be composed predominately of lightweight-cellular and granular inorganic material.

Optimum use of the aggregate size and quality improves the concrete quality. Such as quartz, carborundum for granolithic concrete surfacing. This abstract is a brief summary of the referenced standard.

These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard. It is informational only and not an v331 part of the standard; the full text of the standard itself must be referred to for its use and application. An aggregate mix can be produced without prior separation into coarse and fine aggregates or by combining coarse and fine aggregates sand.

ASTM C Standard Specification for Aggregates for Radiation-Sielding Concrete covers special aggregates for use in radiation-shielding concretes in which composition or high specific gravity, or both, are of prime consideration.

Material round or crushed e. This standard is very comprehensive and to give more details than in the list below would be outside the scope of this document. Lightweight aggregates for structural concrete Lightweight aggregates for masonry concrete Lightweight aggregates for insulating concrete. Concrete aggregates should have a strong bond with the hardened cement paste, should not interfere with the cement hardening, and should not have negative effect on concrete durability.


The c331 stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Lightweight aggregate under test shall meet requirements for clay lumps and friable particles, uniformity of grading, loose bulk density, uniformity of loose bulk density, popouts, resistance to freezing and thawing, and drying shrinkage.

Fine aggregate sand Designation for smaller size asgm with D not greater than 4 mm. From crushed old concrete etc. Fine aggregate shall consist of natural sand, manufactured sand, or a combination thereof.

Concrete Aggregates

Some values have only SI units because the inch-pound equivalents are not used in practice. Natural mineral aggregates of either high density or high fixed water content, or both.

Recycled aggregate Aggregate made from mechanically processed inorganic material previously used as a building material i. ASTM C33 Standard Specification for Concrete Aggregates defines the requirements for grading and quality of fine and coarse aggregate for use in concrete.

This specification covers lightweight aggregates intended for use in concrete masonry units when a prime consideration is to reduce the density of the units. Such as expanded clay, pumice, polystyrene for lightweight concrete, insulating concretes. Coarse aggregate shall consist of gravel, crushed gravel, crushed stone, air-cooled blast furnace slag, or crushed hydraulic-cement concrete, or a combination thereof. It is of high importance to design a reasonable combination of the different materials and their corresponding fractions in order to achieve a continuous combined grading curve.


Such as barytes, iron ore, steel granulate for heavy concrete e. Aggregates prepared by expanding, pelletizing, or sintering products such as blast-furnace slag, clay, diatomite, fly ash, shale, or slate; and Aggregates prepared by processing natural materials, such as pumice, scoria, or tuff The aggregates shall be composed predominately of lightweight-cellular and granular inorganic material.

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The aggregates shall not contain excessive amounts of deleterious substances, as determined by organic impurities, staining, and loss on ignition tests.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Link to Active This link will always route to the current Active version of the standard.

Coarse aggregate may consist of crushed ore, crushed stone, or synthetic products, or combinations or mixtures thereof. Lightweight aggregates shall be tested, and should not contain excessive amounts of deleterious substances; and should conform to the specified values of organic impurities, aggregate staining, aggregate loss of ignition, clay lumps and friable particles, loose bulk density, compressive strength, drying shrinkage, pop-outs, and resistance to freezing and thawing.

Two general types of lightweight aggregates are covered by this specification: The aggregates shall be composed predominately of lightweight-cellular and granular inorganic material.