ASTM C217/C217M REV A Standard Test Method for Weather Resistance of Slate
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ASTM International
Standard Test Method for Weather Resistance of Slate
N C217/C217M REV A
Annotation
This test method covers two procedures for weather resistance of slate in all outdoor installations by determining the depth of softening by shear/scratch tester or by hand scraping.
NOTE 1—The test is based on the fact that slates containing pyrite, calcite, and carbon undergo a chemical weathering which results in the conversion of the calcite particles to gypsum. The swelling action that results causes disintegration of the slate. The extent of this action on various slates in the test has been found to correlate with the durability of the materials in actual weathering.
Units—The values stated in either SI units or inchpound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.
Автоматический перевод:
Стандартный метод тестирования для погодного сопротивления большого списка
Этот метод тестирования покрывает две процедуры для погодного сопротивления большого списка во всех наружных установках путем определения глубины смягчения тестером сдвига/царапины или ручной очисткой.
