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 Lightweight Aggregates for Concrete Masonry Units | CTLGroup
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.
Important terms from the standard with additional notes: Some values have only SI units because the inch-pound equivalents are not used in practice. 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.
Sieve size is identified by aetm standard designation in Specification E Fine aggregate sand Designation for smaller size fractions with D not greater than 4 mm.
These include aetm that c31 or consist predominately of materials such as barite, magnetite, hematite, ilmenite, and serpentine. An aggregate mix can be produced without prior separation into coarse and fine aggregates or by combining coarse and fine aggregates sand. Such as quartz, carborundum for granolithic concrete surfacing. Fine aggregate shall consist of natural sand, manufactured sand, or a combination thereof.
The aggregates shall be composed predominately of c31 and granular inorganic material. 3c31 Proportion of an aggregate passing the 0. The particle size is expressed by the hole size of the test sieves just passed by the particle concerned. The aggregates shall be composed ast, of lightweight-cellular and granular inorganic material.
This standard is very comprehensive and to give more details than in the list below would be outside the scope of this document.
This specification covers lightweight aggregates intended for use in concrete masonry units when a prime consideration is to reduce the density of the units. Combining values from the two systems may result in non-conformance with the standard. Aggregates covered by this specification include: Lightweight aggregates for structural concrete Lightweight aggregates for masonry concrete Lightweight aggregates for insulating concrete. Filler rock flour Aggregate predominantly passing the 0.
Coarse aggregate may consist of crushed ore, crushed stone, or synthetic products, or combinations or mixtures thereof. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
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.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
This abstract is a brief summary of the referenced standard. From crushed old concrete etc.
Coarse and fine normal weight aggregates. Fine aggregate subjected to five cycles of the soundness test shall have a required weighted average loss. Material round or crushed e. Concrete aggregates should have a strong aztm with the hardened cement paste, should not interfere with the cement hardening, and should not have negative effect on concrete durability. Passing fraction, particle size distribution curves The particle size is expressed by the hole size of the test sieves just passed by the particle concerned.
Coarse aggregate Name description for larger size fractions with Astk not less than 4 mm and d not less than 2 mm.
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Fine aggregate for use in concrete that will be subject to wetting, extended exposure to humid atmosphere, or contact with moist ground shall not contain any materials that are deleteriously reactive with the alkalis in the cement in amount sufficient to cause excessive expansion of mortar or concrete. Coarse aggregate shall consist of gravel, crushed gravel, crushed stone, air-cooled blast furnace slag, or crushed hydraulic-cement concrete, or a combination thereof.
Aggregates can occur naturally fluvial or glacialindustrially produced like lightweight aggregates as well as recycled aggregates.
Link to Active This link will always route to the current Active version of the standard. 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.
ASTM C 331—05 Specification for Lightweight Aggregates for Concrete Masonry Units (PDF Download)
Fine aggregate sstm of natural or manufactured sand including high-density minerals. Concrete aggregates, consisting of sand and gravel, represent the grain skeleton of the concrete. Synthetic aggregates such as iron, steel, ferrophosphorus and boron frit or other boron compounds see Descriptive Nomenclature C The aggregates awtm not contain excessive amounts of deleterious substances, as determined by organic impurities, staining, and loss on ignition tests. For high-quality concrete they are cleaned and graded in industrial facilities by mechanical processes such as crushing, washing, screening and mixing together.
All cavities within this skeleton have to be filled with binder paste as complete as possible. Three general types of lightweight aggregates are covered by this specification: ASTM does not give any warranty express or implied or make any representation that the astn of this abstract are accurate, complete or up to date.
Recycled aggregate Aggregate made from mechanically processed inorganic material previously used as a building material i.