Item 2, Revision of D228. Task Group D08-02-02, Sid Dinwiddie, Chairman and Technical Contact. Revise Section 15.2.1, as shown below: 15.2.1 Wrap each of the small specimens identified in 15.1 in two layers of pre-dried filter paper with particle retention to 2.7 m (Note 7), and secure each wrapped small specimen with a soft copper wire. It is permitted to cut the specimens into smaller pieces so that the wrapped specimens fit into the extraction glassware. Use suitable care to assure that all specimen pieces, fragments and/or particles, as generated by the cutting process, are collected and included in the wrapped specimen. Mark and record the mass of each wrapped specimen, to the nearest 0.01 g (0.00002 lb), as Total Mass + Tare. Rationale: It has been noted that cutting the specimens into smaller pieces is a common practice, as most glassware cannot accommodate the initial specimen size. This additional text clearly expresses that this practice is allowed. Mass IP equivalent added for reference. Item 3, Revision of D228. Task Group D08-02-02, Sid Dinwiddie, Chairman and Technical Contact. Revise Section 16.2.2, as shown below: 16.2.2 Extract the asphalt from each specimen from 16.2.1 in a soxhlet or similar extractor with 1,1,1 trichloroethane any suitable solvent until the extract is clear. (See Note 8, Section 15.2.2) This can require up to 30 extraction hours. Dry the extracted specimens in a hood at room temperature. Final dry each specimen in a 105C (221F) 5 % forced draft oven for 60 min 10 %. Cool the specimens in a desiccator to room temperature and record the mass of each, to the nearest 0.01 g (0.00002 lb), as Extraction Residue + Tare. Rationale: Removing the requirement to use 1,1,1 trichloroethane was made to 15.2.2 [glass felt products] several years ago. Section 16.2.2 [organic felt] was overlooked at that time. Organic felt should be processed with the same consideration to solvent suitability. 1,1,1 trichloroethane is generally not available and may be undesirable for other reasons, as well. Extraction time is covered in the note.
Keywordsanalysis; asphalt; cap sheets; composition; physical testing; roll roofing; sampling; shingles
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