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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Coarse aggregate shall consist of gravel, crushed gravel, crushed stone, air-cooled blast furnace slag, or crushed hydraulic-cement concrete, or a combination thereof. The alternative designation given in parentheses is for information only and does not represent a different standard sieve size. It is informational only and not an official part of axtm standard; the full text of the standard itself must be referred to for its use and application.
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.
Lightweight aggregates for structural concrete Lightweight aggregates for masonry concrete Lightweight aggregates for insulating concrete.
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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. Filler rock flour Aggregate predominantly passing the 0. The aggregates shall not contain excessive amounts of deleterious substances, as determined by organic impurities, staining, and loss on ignition tests. Coarse aggregate Name description for larger size fractions with D not less than 4 mm and d not less than 2 mm.
The aggregates shall be composed predominately of lightweight-cellular and granular inorganic material. Aggregates can occur naturally fluvial or glacialindustrially produced like lightweight aggregates as well as recycled aggregates. 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.
Such as barytes, iron ore, steel granulate for heavy concrete e. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard. Three general types of lightweight aggregates are covered by this specification: Sieve size is identified by its standard designation in Specification E Fine aggregate subjected to five cycles of the soundness test shall have a required weighted average loss.
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The particle size is expressed by the hole size of the test sieves just passed by the particle concerned. Fine aggregate consisting of natural or manufactured sand including high-density minerals.
In Europe aggregates are defined in standard EN 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.
Important terms from the standard with additional notes: Fine aggregate for use in concrete that will be subject to wetting, extended exposure to humid atmosphere, or contact with moist ground shall cc331 contain any materials that are deleteriously reactive with the alkalis in the cement in amount sufficient to cause excessive expansion of mortar or concrete.
Recycled aggregate Aggregate made from mechanically processed inorganic material previously used as a building material i.
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.
Aggregates covered by this specification include: ASTM C33 Standard Specification for Concrete Aggregates defines the requirements for grading and quality of fine and coarse aggregate for use in concrete. Coarse and fine normal weight aggregates. For high-quality concrete they are cleaned and graded in industrial facilities by mechanical processes such as crushing, washing, screening and mixing together. Granulometric composition Particle size distribution, expressed as the passing fraction in percent by weight through a defined number of sieves.
This specification covers lightweight aggregates intended for x331 in concrete masonry units when a prime consideration is to reduce the density of the units.
Concrete aggregates, consisting of sand and gravel, represent the grain skeleton of the concrete. Fine aggregate shall consist of natural sand, manufactured sand, or a combination thereof. This abstract is a brief summary of the referenced standard.
Synthetic aggregates such as iron, steel, ferrophosphorus and boron frit or other boron compounds see Descriptive Adtm C Aggregate Mix Aggregate consisting of a mixture of coarse and fine aggregates sand. Link to Active This link will always route to the current Active version of the standard. Aggregates prepared by expanding, pelletizing, or sintering products such as blast-furnace slag, clay, diatomite, asrm 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.
Fine aggregate sand Designation for smaller size fractions with D not greater than 4 mm.
Material round or crushed e. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Fine aggregate shall be free of injurious amounts of organic impurities. ASTM does not give any warranty express or implied or make any representation that the contents asstm this abstract are accurate, complete or up to date.
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.
ASTM C 331—05 Specification for Lightweight Aggregates for Concrete Masonry Units (PDF Download)
Two general types of lightweight aggregates are covered by this specification: Concrete aggregates should have a strong bond with the hardened cement paste, should atsm interfere with the cement hardening, and should not have negative effect on concrete durability.
Such as quartz, carborundum for granolithic concrete surfacing. The aggregates shall be composed predominately of lightweight-cellular and granular inorganic material. Fines Proportion of an aggregate passing the 0. All cavities within this skeleton have to be filled with binder paste as complete as possible.
Natural mineral aggregates of either high density or high fixed water content, or both. An aggregate mix can be produced without prior separation into coarse and fine aggregates or by combining coarse and fine aggregates sand. From natural deposits, e.