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ASTM C778-21
Standard Specification for Standard Sand
NORMA vydaná dňa 1.12.2021
Informácie o norme:
Označenie normy: ASTM C778-21
Dátum vydania normy: 1.12.2021
Kód tovaru: NS-1045122
Počet strán: 3
Približná hmotnosť: 9 g (0.02 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM C778-21 :
This specification covers standard sand for use in the testing of hydraulic cements. Sand shall meet the requirements with respect to grading, source of sand, and absence of undesirable air entraining characteristics. Sieve analysis shall be performed by sieving the sand by hand or mechanically as prescribed. Results of the sieve analysis shall be reported as total percentage passing each sieve. Small amounts of some surfactants or other contaminants will produce air voids in mortars with 20-30 sand, graded sands or both. Tests for air-entraining potential of standard sand shall be made on a single day by a single operator.
Keywords:
20-30 sand, graded sand, hydraulic cement testing sand, standard sand,, ICS Number Code 91.100.15 (Mineral materials and products)
Doplňujúce informácie
| 1. Scope | ||||||||||||||||||||
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1.1?This specification covers standard sand for use in the testing of hydraulic cements. 1.2?The values stated in SI units are to be regarded as the standard. 1.3?Values in SI units shall be obtained by measurement in SI units or by appropriate conversion, using the Rules for Conversion and Rounding given in IEEE/ASTM SI 10, of measurements made in other units. 1.4?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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||||||||||||||||||
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