Toespraak : Simposium : Lugbesoedeling - Uitdagings in Suidelike Afrika • 26 November 1986 : W N N R Konferensiesentrum Pretoria

Hunter, J K

doi:10.17159/caj/1986/7/2.7350

Cited by 1 publication

(2 citation statements)

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“…These differences between penetration grades may be due to differing treatments and the management of fractions during the refinement process. 50 A clear separation between samples of bitumen products with fuming concerns and those without fuming concerns was observed in the results of the TGA testing. The five highest weight loss measurements were all found in samples reported as fuming, 46559, 120, 117, 327, and 43369, with percentages of 8.92, 3.31, 3.28, 315, and 2.68, respectively.…”

Section: Resultsmentioning

confidence: 85%

“…This contrast of weight loss is seen in samples 117 and 207, 3.28 and 0.74%, respectively, where weight loss differs significantly between bitumen samples of similar penetration grades. These differences between penetration grades may be due to differing treatments and the management of fractions during the refinement process . A clear separation between samples of bitumen products with fuming concerns and those without fuming concerns was observed in the results of the TGA testing.…”

Section: Resultsmentioning

confidence: 99%

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Multimethod Approach to Investigate the Factors Influencing High-Temperature Fuming of Bitumen

Deller,

Grist,

Giustozzi

et al. 2024

ACS Omega

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Bitumen is heated at high temperatures during asphalt paving applications. In these circumstances, there is the possibility for fuming. These fumes can vary in intensity and, if significant, may attract complaints. The bitumen's chemical composition depends on the crude oil from which it originates. A tool to screen bitumen and evaluate its potential to release fumes would be highly beneficial. In this study, three methods have been employed to investigate a series of bitumen samples that were known to produce complaints by (a) quantifying benzene, toluene, ethylbenzene, and m, o, p-xylene (BTEX), (b) measuring the partition coefficients of these analytes, and (c) measuring the volatile mass of bitumen exposed to isothermal heating. It was found that the concentration of BTEX varied significantly between bitumen samples. The partition coefficients of these analytes are substantially the same between samples. Finally, the volatile mass of each sample varies significantly between samples, independent of bitumen grade or country of origin. These volatile masses correlate strongly with fuming complaints from bitumen and can be used as predictors of bitumen fuming risk.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%