Photooxidation of Corbett Fractions of Asphalt

Huang, J.; Yuro, R.; Romeo, Giuseppe

doi:10.1080/08843759508947727

Cited by 18 publications

(16 citation statements)

References 8 publications

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“…Bitumen is a hydrocarbon compound comprised of 80 % carbon, 10 % hydrogen, 6 % sulfur and remaining percent made from nitrogen and oxygen. In addition to the increased concentrations of C=O groups, photooxidation may lead to the increased presence of certain types of sulfur-oxygen groups, including sulfate groups (SO 4 ), thus, leading to the hardening and embrittling of the asphalt [26][27]. Besides, with heat treatment, the asphalt transforms into an adhesive liquid and easily mixes with other materials.…”

Section: Introductionmentioning

confidence: 99%

Bituminous Composite Comprising Amorphous Silica From Rice Husks

Sembiring¹

2019

Ceramics - Silikaty

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and calcined at the temperature of 150 °C for 6 hours. The structural and microstructural characteristics of the bituminous composites were examined by X-ray diffraction (XRD), Fourier Transform Infrared (FTIR), Differential Thermal Analysis (DTA/TGA), and Scanning Electron Microscopy/Energy-Dispersive X-ray (SEM/EDX). Further evaluation was made by comparing the characteristics of the modified bituminous composites including the density, porosity, compressive strength, swelling thickness, and water absorption. The XRD study revealed that the major phases were silica and carbon amorphous, which were associated with the Si-OH, Si-O-Si and C-H functional groups according to the FTIR analysis. The DTA/TGA analysis resulted in an increase in the temperature decomposition by adding silica which was 230 to 315 °C. In addition, an increased silica addition was followed by an increase in the density, compressive strength, swelling thickness, and water absorption, while the opposite was true for the porosity. Based on these characteristics, rice husk silica has a positive effect on improving the mixture of high and low temperature performance, water stability, for use as a substitute in lightweight steel roof devices.

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Section: Introductionmentioning

confidence: 99%

Bituminous Composite Comprising Amorphous Silica From Rice Husks

Sembiring¹

2019

Ceramics - Silikaty

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“…At wavelengths in the visible range (>400 nm), no photo-oxidation was detected. In addition to increased concentrations of C=O groups, photo-oxidation also leads to the increased presence of several types of sulfur-oxygen groups including the sulfate (SO 4 ) group [19]. As a result of oxidation, asphalt becomes harder and embrittled [19.20].…”

Section: Photodegradation Of Polymeric and Other Organic Materialsmentioning

confidence: 99%

Weathering of roofing materials – An overview

Berdahl

Akbari

Levinson

et al. 2008

Construction and Building Materials

234

121

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An overview of several aspects of the weathering of roofing materials is presented. Degradation of materials initiated by ultraviolet radiation is discussed for plastics used in roofing, as well as wood and asphalt. Elevated temperatures accelerate many deleterious chemical reactions and hasten diffusion of material components. Effects of moisture include decay of wood, acceleration of corrosion of metals, staining of clay, and freezethaw damage. Soiling of roofing materials causes objectionable stains and reduces the solar reflectance of reflective materials. (Soiling of non-reflective materials can also increase solar reflectance.) Soiling can be attributed to biological growth (e.g., cyanobacteria, fungi, algae), deposits of organic and mineral particles, and to the accumulation of flyash, hydrocarbons and soot from combustion.

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“…10.9). The prevalence of high oxides of sulphur upon weathering bituminous sealants is reminiscent of the sulphates obtained by accelerated photo-oxidation of bitumen (Huang et al, 1995), an oxidation process that leads to watersoluble material (streiter and snoke, 1936;oliver and Gibson, 1972). it is thus not surprising that sealant mass loss is observed with FTiR and HRTG, as detailed below.…”

Section: Carbon and Sulphur Oxidationmentioning

confidence: 91%