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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The aggregates shall be composed predominately of lightweight-cellular and granular inorganic material. Fine aggregate shall be free of injurious amounts of organic impurities. It is of high importance to design awtm reasonable combination of the different materials and their corresponding fractions in order to achieve a continuous combined grading curve.
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The aggregates shall be composed predominately of lightweight-cellular and granular inorganic material. 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. Aggregate Mix Aggregate consisting of a mixture of coarse and fine aggregates sand. Some values have only SI units because the inch-pound equivalents are not used in practice.
This abstract is a brief summary of the referenced standard. Coarse and fine normal weight aggregates. The particle size is expressed by the hole size of the test sieves just passed by the particle concerned.
Recycled aggregate Aggregate made from mechanically processed inorganic material previously used as a building material i. The aggregates shall not contain excessive amounts of deleterious substances, as determined by organic impurities, staining, and loss on ignition tests. Fine aggregate subjected to five cycles of the soundness test shall have a required weighted average loss. In Europe aggregates are defined in standard EN 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 quartz, carborundum for granolithic concrete surfacing. 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.
ASTM C 331—05 Specification for Lightweight Aggregates for Concrete Masonry Units (PDF Download)
This standard is very comprehensive and to give more details than in the list below would be outside the scope of this document. Link to Active This link will always route to the current Active version of the standard. Aggregates can occur naturally fluvial or glacialindustrially produced like lightweight aggregates as well as recycled aggregates.
These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard. Fine aggregate shall consist of natural sand, manufactured sand, or a combination thereof. The alternative designation given in parentheses is for information only and does not represent a different standard sieve size. Synthetic aggregates such as iron, steel, ferrophosphorus and boron frit or other boron compounds see Descriptive Nomenclature C Fine aggregate consisting of natural or manufactured sand including high-density minerals.
Lightweight aggregates for structural concrete Lightweight aggregates for masonry concrete Lightweight aggregates for insulating concrete. Material round or crushed e. An aggregate mix can be produced without prior separation into coarse and fine aggregates or by combining coarse and fine aggregates sand.
Optimum use of the aggregate size and quality improves the concrete quality.
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. Such as expanded clay, pumice, polystyrene for lightweight concrete, insulating concretes. Such as barytes, iron ore, steel granulate for heavy concrete e. From crushed old concrete etc. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
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. Combining values from the two asmt may result in non-conformance with the standard.
Fines Proportion of an aggregate passing the 0. Historical Version s – view previous versions of standard. Natural mineral atsm of either high density or high fixed water content, or both.
Three general types of lightweight aggregates are covered by this specification: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
These include aggregates that contain or consist predominately of materials such as barite, magnetite, hematite, ilmenite, and serpentine.
Sieve size is v331 by its standard designation in Specification E 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 covered by this specification include: Important terms from the standard with additional notes: Coarse aggregate Name description for larger size fractions with D not less than 4 mm and d not less than 2 mm.
For high-quality concrete they are cleaned and graded in industrial facilities by mechanical processes such as crushing, washing, screening and mixing astn. ASTM C33 Standard Specification for Concrete Aggregates defines the requirements for atsm and quality of fine and coarse aggregate for use in concrete. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
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. All cavities within this skeleton have to be filled with binder paste as complete as possible.
Two general types of lightweight aggregates are covered by this specification: From awtm deposits, e.
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Concrete aggregates, consisting of sand and gravel, represent the grain skeleton of the concrete. ASTM C Standard Specification for Aggregates for Radiation-Sielding Concrete covers special aggregates for use in radiation-shielding concretes in which awtm or high specific gravity, or both, are of prime consideration. Filler rock flour Aggregate predominantly passing the 0.