Topic
Transite
About: Transite is a research topic. Over the lifetime, 6 publications have been published within this topic receiving 50 citations.
Papers
TL;DR: In this paper, data were collected and analyzed on airborne concentrations of asbestos generated by abatement of different asbestos-containing materials using various removal practices, including removal of boiler/pipe insulation in a crawl space, ceiling tile, transite, floor tile/mastic with traditional methods, and mastic removal with a high-efficiency particulate air filter blast track (shot-blast) machine.
Abstract: Data were collected and analysed on airborne concentrations of asbestos generated by abatement of different asbestos-containing materials using various removal practices. Airborne concentrations of asbestos are dramatically variable among the types of asbestos-containing material being abated. Abatement practices evaluated in this study were removal of boiler/pipe insulation in a crawl space, ceiling tile, transite, floor tile/mastic with traditional methods, and mastic removal with a high-efficiency particulate air filter blast track (shot-blast) machine. In general, abatement of boiler and pipe insulation produces the highest airborne fibre levels, while abatement of floor tile and mastic was observed to be the lowest. A comparison of matched personal and area samples was not significantly different, and exhibited a good correlation using regression analysis. After adjusting data for outliers, personal sample fibre concentrations were greater than area sample fibre concentrations. Statistical analysis and sample distribution of airborne asbestos concentrations appear to be best represented in a logarithmic form. Area sample fibre concentrations were shown in this study to have a larger variability than personal measurements. Evaluation of outliers in fibre concentration data and the ability of these values to skew sample populations is presented. The use of personal and area samples in determining exposure, selecting personal protective equipment and its historical relevance as related to future abatement projects is discussed.
50 citations
6 Dec 1995
TL;DR: In this article, the penetration depth of radiological contamination through the thickness of transite (an asbestos-cement building material) from the Department of Energy Fernald site, both destructive and non-destructive analysis techniques were used.
Abstract: To characterize the penetration depth of radiological contamination through the thickness of transite (an asbestos-cement building material) from the Department of Energy (DOE) Fernald site, both destructive and non-destructive analysis techniques were used. The destructive techniques were based on progressively removing layers of material and subsequent direct analysis of successive surfaces. These laminar analyses included quantitative measurements using a Geiger-Mueller (G-M) detector and qualitative measurements based on autoradiography and ultraviolet photography. G-M detector measurements during layer removal provided quantitative distributions consistent with diffusion theory and have served to validate a novel non-destructive technique. The ultraviolet analysis provided qualitative information with the advantage of instantaneous results that may be useful for screening samples. The autoradiographic analysis also provided qualitative results for comparison and image analysis. Both quantitative and qualitative results from this study indicated that the contamination did penetrate into the volume of the transite. However, this penetration depth was observed to be strongly dependent on the manner in which the transite was exposed to the contamination. Consequently, it is likely that significantly different penetration depths will be observed for different processes, buildings, and sites.
3 citations
1 Jan 1997
TL;DR: A comparison of the use of 6328, 785 and 1064 nm excitation wavelengths for Raman spectroscopy was made, to determine which wavelength was most appropriate for this study as discussed by the authors.
Abstract: Methods of determining the presence of asbestos and transite (an asbestos/concrete blend) for decommissioning and decontamination of hazardous waste sites have been developed, based on use of infrared diffuse reflectance (DR) spectrometry [in both the mid- (MIR) and near-infrared (NIR) spectral regions] and Raman spectroscopy A comparison of the use of 6328, 785 and 1064 nm excitation wavelengths for Raman spectroscopy was made, to determine which wavelength was most appropriate for this study
2 citations
2 Feb 2019
TL;DR: In this article, phase contrast microscopy and transmission electron microscopy (TEM) were used for sample analyses to evaluate asbestos exposure from gloves, tong sleeves, and Transite board with simulated laboratory use.
Abstract: Asbestos containing materials (ACM) have been used for decades in research laboratory products including gloves, tong sleeves, Transite board, and other materials. These materials typically contain chrysotile asbestos with concentrations ranging up to 80%. The objective of this research was to evaluate asbestos exposure from gloves, tong sleeves, and Transite board with simulated laboratory use. An environmental chamber was used to simulate laboratory application of the products. Bulk samples of various products were tested before and after use. Personal breathing zone air samples as well as one cumulative air sample were collected during testing and followed the National Institute for Occupational Safety and Health (NIOSH) 7400/7402 methodologies. Phase contrast microscopy (PCM) and transmission electron microscopy (TEM) were used for sample analyses. Analysis of air samples using PCM, showed airborne fiber concentrations as high as 0.058 f/cc during use of tongs fitted with asbestos sleeves. Further analysis using TEM showed that the highest airborne fiber concentration was 0.0036 f/cc. Manipulation of Transite board resulted in 8-hour time-weighted-average (TWA) asbestos levels as high as 0.02 f/cc. Testing of various asbestos containing materials used in research laboratories indicate low potential for asbestos fiber exposures.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 1 |
| 2013 | 1 |
| 1997 | 1 |
| 1996 | 1 |
| 1995 | 1 |
| 1949 | 1 |