Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete (Includes all amendments And changes 12/31/2010).

Informace o normě:

Označení normy: ASTM C457-08a
Poznámka: NEPLATNÁ
Datum vydání normy: 1.5.2008
Počet stran: 14
Přibližná hmotnost: 42 g (0.09 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

Anotace textu normy ASTM C457-08a :

Keywords:
air content, air void parameters of hardened concrete, area-prepared surface required, average chord-length of voids, determination of air-void parameters, entrained void, entrapped void, grits for lapping hardened concrete, index point, lapping, length of traverse required, linear-traverse method, microscopical, number of points required, paste-air ratio, paste-air ratio modification, paste content, point-count method (modified), sample preparation for microscopical analysis, spacing factor