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Abstract
This investigtion was Phase 1 of a two part study to develop a test method that can be used in the field to measure the friability of spray applied fireproofing and insulating materials containing asbestos fibers. The objective of the first phase was to establish the technical basis for development of a test method to measure friability quantitatively. The test method is intended for use in lieu of current field procedures which involve evaluation by hand pressure and are subjective. A flow chart was prepared outlining a systematic sequence for conducting the field assessments. Four test methods were selected: compression/shear, indentation, abrasion, and impact. For each of the four tetss, mechanical devices were devised by modification of existing material test apparatus. A description of the test devices is given in the report. Preliminary lab tests, conducted on specially prepared spray on (non asbestos) materials having a range of friability, were performed. The results suggested that the devices could distinguish differences in friability between the test samples. Further evaluation of the prototype test devices will be made in the lab and field in Phase 2 of the study.
This investigtion was Phase 1 of a two part study to develop a test method that can be used in the field to measure the friability of spray applied fireproofing and insulating materials containing asbestos fibers. The objective of the first phase was to establish the technical basis for development of a test method to measure friability quantitatively. The test method is intended for use in lieu of current field procedures which involve evaluation by hand pressure and are subjective. A flow chart was prepared outlining a systematic sequence for conducting the field assessments. Four test methods were selected: compression/shear, indentation, abrasion, and impact. For each of the four tetss, mechanical devices were devised by modification of existing material test apparatus. A description of the test devices is given in the report. Preliminary lab tests, conducted on specially prepared spray on (non asbestos) materials having a range of friability, were performed. The results suggested that the devices could distinguish differences in friability between the test samples. Further evaluation of the prototype test devices will be made in the lab and field in Phase 2 of the study.
Date
12/1987
12/1987
Author(s)
W Rossiter Jr; W Roberts; R Mathey
W Rossiter Jr; W Roberts; R Mathey
Page(s)
59
59
Keyword(s)
abrasion, asbestos containing materials; compression; fireproof friability; impact; indentation; shear; thermal insulation
abrasion, asbestos containing materials; compression; fireproof friability; impact; indentation; shear; thermal insulation