ASTM C511-21

Podrobné informace

Označení: ASTM C511-21

Datum vydání: 01.12.2021

Stran: 3

Země: Americká technická norma

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Anotace

This specification includes the requirements for mixing rooms where paste and mortar specimens are prepared and for moist cabinets, moist rooms, and water storage tanks where paste, mortar, and concrete specimens are stored; intended for use in the testing of hydraulic cements and concretes. The system shall be equipped with a temperature recorder and a reference temperature measuring device that are to be placed practically near to each other. The air and mixing water temperatures and the relative humidity in the cement mixing room shall be maintained at specific values. Moist cabinets and moist rooms shall be constructed of durable materials with tight-fitting doors or windows for all openings. Air in moist cabinet or moist room shall be saturated with moisture in order to provide specified storage conditions and air temperature shall be controlled with provisions made for heating, cooling, or both. The specified relative humidity in these systems shall be maintained by the use of one or more fog sprays, water sprays, or curtains of water on the inner walls. Water storage tanks shall be constructed of non-corroding materials with provisions for automatic control of water temperature. The water in a storage tank shall be saturated with calcium hydroxide to prevent leaching.


Keywords:
cement paste, concrete, mixing room, moist cabinets, moist rooms, mortar, water storage tanks ,, ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar),91.100.30 (Concrete and concrete products)