Effect of layered double hydroxides on ultraviolet aging resistance of SBS modified bitumen membrane

Xu, Song; Yu, Jianying; Li, Xue; Sun, Yu; Xie, Dong

doi:10.1007/s11595-015-1178-6

Cited by 16 publications

(7 citation statements)

References 24 publications

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“…Pristine bitumen was poured into an oil-bath heating iron container, and heated to a well fluid at around 140°C. The weighed LDHs or OLDHs (3 wt.% by weight of bitumen as determined by our previous study [28]) were added into the bitumen, and then, the blend was sheared for an hour at the shearing temperature of (140 ± 5)°C and shearing rate of 4000 rpm to ensure fully homogenous. Finally, the modified bitumen was poured into molds to conduct related experiments and tests.…”

Section: Preparation Of Modified Bitumenmentioning

confidence: 99%

Investigation of the ultraviolet aging resistance of organic layered double hydroxides modified bitumen

et al. 2015

Construction and Building Materials

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Section: Preparation Of Modified Bitumenmentioning

confidence: 99%

Investigation of the ultraviolet aging resistance of organic layered double hydroxides modified bitumen

et al. 2015

Construction and Building Materials

Self Cite

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“…Several works have studied the impact of these environmental conditions on the degradation and accelerated aging processes of the BS. However, these works have focused on the physical and mechanical properties of the BS [39][40][41][42], ignoring the environmental aspects that these degradation processes may have, such as the emission of pollutants to the environment. Since the main purpose of BS is to physically seal the roof surfaces, it is well understood why the physical properties of the sheets are so important and well-studied.…”

Section: Bitumen Sheets and Water Qualitymentioning

confidence: 99%

“…As aforementioned, sun radiation is assumed to have an important role in the degradation processes of the BS [40,41,46], which may affect the release of different components to the roof water. Therefore, the 'Sun' and 'Shade' setups were examined under the conditions of exposure to direct and indirect sun radiation, which were measured throughout the period of the study at a meteorological station of the Israeli Meteorological Service, located ~1 km north of roof #3, where the experiment was conducted (data available on line https://ims.data.gov.il/he/ims/6 (accessed on 13 September 2021)).…”

Section: Controlled Experimental Studymentioning

confidence: 99%

Dynamic Release of Solutes from Roof Bitumen Sheets Used for Rainwater Harvesting

Nachshon

Ben‐Hur

Kurtzman

et al. 2021

Water

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Bitumen waterproof sheets are widely used to seal building roofs. Previous works have focused on the mechanical-physical properties of bitumen sheets, as well as their aging and degradation processes, and their impact on sealing properties of the buildings. Due to a growing need over recent years to use rooftops in urban environments for rainwater harvesting purposes, it is highly important to better characterize the quality of the harvested water from the bitumen covered roofs, and to shed more light on the impact of bitumen degradation processes on the release of various components to the harvested roof water. In the present study, the extracted organic and inorganic solutes from bitumen-covered roofs by water flow on the bitumen sheets were examined through a series of experiments, including measurements from the roofs of buildings in the center of Israel during the winter of 2019–2020. The results indicated high levels of organic and inorganic solute loads in the roof water during the first flush of the first rain of the winter, with maximal electric conductivity readings at the order of 4 dS/m. However, it was shown that following the first flush, a ~20 mm of cumulative rainfall was sufficient to wash off all the summers’ accumulated solutes from the roof. After this solute flushing of the roof, harvested rainwater along the winter was of good quality, with electric conductivity readings in the range of 0.04–0.85 dS/m. Moreover, it was shown that bitumen sheets which were exposed to direct sun radiation emitted greater loads of solutes, likely a result of elevated aging and degradation processes. The findings of the present research point to the need to find efficient ways to isolate roof bitumen sheets from direct sun radiation and to design rainwater harvesting systems that will not collect the water drained from the first flush.

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“…Wu et al [ 20 ] proved that LDHs can alleviate the damaging effects of UV light on the rheological properties, and strengthen the anti-UV aging properties of bitumen. Xu et al [ 21 ] found that LDHs can reduce bitumen aging and reduce SBS degradation. However, as an inorganic material, the strong hydrophilicity of LDHs can result in poor storage stability in bitumen [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

SBS Modified Bitumen with Organic Layered Double Hydroxides: Compatibility and Aging Effects on Rheological Properties

et al. 2021

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SBS-modified bitumen (SMB) is susceptible to aging, which seriously influences its service performance and life. In order to strengthen the anti-aging ability of SMB, triethoxyvinylsilane was designed to organically modify layered double hydroxides (LDHs) and was applied to modify SMB. The dispersibility and storage stability of LDHs in SMB were markedly enhanced after triethoxyvinylsilane organic modification, and the compatibility and storage stability of SBS in bitumen were simultaneously enhanced. Compared with SMB, the introduction of LDHs and organic LDHs (OLDHs) could ameliorate the high-temperature properties of SMB, and the thermostability of SBS in bitumen at a high temperature was also distinctly improved, especially OLDHs. After aging, due to the oxidation of molecular bitumen and the degradation of molecular SBS, SMB became hardened and brittle, and the rheological properties were significantly deteriorated, which had serious impacts on the performance of SMB. LDHs can mitigate the detriment of aging to bitumen and SBS, and the deterioration of the rheological properties of SMB is obviously alleviated. As a result of the better dispersibility and storage stability, OLDHs exerted superior reinforcement of the anti-aging ability of SMB.

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Effect of layered double hydroxides on ultraviolet aging resistance of SBS modified bitumen membrane

Cited by 16 publications

References 24 publications

Investigation of the ultraviolet aging resistance of organic layered double hydroxides modified bitumen

Investigation of the ultraviolet aging resistance of organic layered double hydroxides modified bitumen

Dynamic Release of Solutes from Roof Bitumen Sheets Used for Rainwater Harvesting

SBS Modified Bitumen with Organic Layered Double Hydroxides: Compatibility and Aging Effects on Rheological Properties

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