Buildings and civil engineering works. Sealants. Determination of crazing and cracking following exposure to artificial or natural weathering
建筑和土木工程 密封剂 人工或自然风化后龟裂和开裂的测定
BS ISO 11528:2016 specifies methods for the assessment of surface defects (crazing and
cracking) on sealants after exposure to artificial or natural weathering.NOTE Sealants are weathered in the laboratory in order to simulate ageing processes occurring during
natural weathering. Generally, valid correlations between ageing during artificial and natural weathering cannot
be expected because of the large number of influencing factors. Certain relationships can only be expected if
the effect of the important parameters (spectral distribution of the irradiance in their photochemically relevant
range, temperature of the specimen, type of wetting, wetting cycle relative humidity) on the sealant is known.
However, unlike natural weathering, testing in the laboratory is carried out taking into consideration a limited
number of variables which can be controlled, and therefore, the results are more reproducible.Cross References:ISO 291ISO 3668ISO 6927CIE 51ISO 8339ISO 11617CIE 051.2:1999All current amendments available at time of purchase are included with the purchase of this document.