AASHTO - American Association of State Highway and Transportation Officials
适用范围
This test method covers the determination of the time of setting of hydraulic cement paste by means of the Gillmore needles. The values stated in inch-pound units are to be regarded as standard. The SI units@ regarded as standard in ASTM C266@ are provided for informational use only with regard to the original direction of mathematical conversion; as such@ the inch-pound units are shown in parentheses. This standard may involve hazardous materials@ operations@ and equipment. This standard does not purport to address all of the safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Warning??Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure. The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.