Laboratory evaluation on water-based and flexible epoxy/SiO&lt;sub&gt;2&lt;/sub&gt; nanocomposites to enhance anti-sliding effectiveness of pavement

Sun, Pan; Liang, Xiayi; Ding, Yue; Wang, Tingwei; Xiang, Shanglin; Cai, Dongyu

doi:10.1088/2053-1591/ab6e83

Cited by 3 publications

(2 citation statements)

References 39 publications

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“…XRD pattern in figure 2(d) shows that the concrete is composed of quartz (SiO 2 ), calcium silicate, calcium silicate hydrate, calcium hydroxide, ettringite and calcium carbonate. This was in the agreement with previous publications [27,28]. In the SEM images, it could be seen that the size of the bumpers on the surface of C-3 sample is less than 3 μm, which is smaller than of that of C-1 and C-2 samples.…”

Section: Resultssupporting

confidence: 93%

Integrated design of a robust superhydrophobic cement mortar layer via sizing sand grains

Lin,

Wu,

Wang

et al. 2023

Mater. Res. Express

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This work reported a facile route for fabricating super-hydrophobic cement mortar layer via sizing sand grains. It was found that mixing the sands with a size ranging from 150-180 µm into cement enabled the formation of a lotus-like surface with a papillary structure at micro-scale. SEM showed that the size of bumper was about 3 μm. When spraying a fluorocarbon solution onto this surface, the porous nature of the cement matrix showed the advantage of taking the fluorocarbon into the internal structure of the cement mortar layer via capillary force. As a result, the sub surface up to a depth of ~1.5 mm was transformed into a thick superhydrophobic layer directly. The contact angle (CA) of water droplets could reach 157o on this surface, and which could remain more than 150° after abrasion 100 cycles under a weight of 300 g at 360 grit sandpaper. This thick hydrophobic layer significantly reduced the corrosion rate of the steel at the Cl- environment by 620 times. The measurement of British pendulum number and compression strength revealed that this superhydrophobic layer was beneficial for maintaining the friction coefficient of the surface in wet condition without altering the mechanical integrity of the cement mortar layer.

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Section: Resultssupporting

confidence: 93%

Integrated design of a robust superhydrophobic cement mortar layer via sizing sand grains

Lin,

Wu,

Wang

et al. 2023

Mater. Res. Express

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“…Yan et al used WER with an epoxy value of 0.44 eq/100g to study the rheological properties of emulsified asphalt [21]. Sun et al reviewed the laboratory research on the skid resistance of asphalt pavement modified by WER with the epoxy value of 0.51 eq/100g and nano-silica composite [22]. Nevertheless, a single kind of WER-EA is usually used in previous studies, resulting in insufficient research on the differences in the effects of epoxy values on WER-EA.…”

Section: Plos Onementioning

confidence: 99%

Effect of epoxy value on the rheological properties and microcosmic mechanism of WER emulsified asphalt

Huang,

Shi,

Ouyang

2024

PLoS ONE

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Waterborne epoxy resin (WER), a cleaning material with exceptional high-temperature resistance, has attracted much attention to modify emulsified asphalt in the pavement material field. Epoxy value is the critical characteristic index of WER. In this research, three WER with the epoxy values of 0.20 eq/100g, 0.44 eq/100g, and 0.51 eq/100g were utilized as asphalt modifiers. The influence of epoxy value on WER-EA was investigated by comparing the rheological properties of three kinds of WER emulsified asphalt (WER-EA). The modification mechanism of WER-EA has been analyzed using FTIR and SEM. The results demonstrate that different WER-EA resulted in significantly different rheological properties. WER-EA with the epoxy value of 0.20 eq/100g (E20) performed best at high temperatures, with a maximum increase of 17477% in G*/sinδ compared to the neat asphalt and a maximum increase of 66.3% in G*/sinδ compared to the other two WER-EA. WER-EA with 0.44 eq/100g epoxy value (E44) performed best at low temperatures, with a maximum increase in m value of 39.4% and a maximum decrease in S value of 33.3% compared to the other two WER-EA. In addition, the interpenetrating polymer network (IPN) in E20 was observed to be more solid and stable, and IPN in E44 was more uniform. To summarize, lower epoxy value led to a higher degree of WER reaction and higher content of rigid groups, which is more conducive to optimizing the high-temperature property of WER-EA. WER with moderate epoxy value resulted in a low content of polar bonds and thus high content of flexible segments, which helps emulsified asphalt to form a more uniform IPN.

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Effect of fly ash chemical components on epoxy mortar composite material performance

Cao,

Liang,

2024

Journal of Reinforced Plastics and Composites

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This study focuses on the application of fly ash (FA)-filled epoxy mortar composite material (EMCM) as a bed material for precision machine tools, emphasizing the impact of fly ash’s primary chemical components (SiO2, Al2O3, Fe2O3, and CaO) as mono-component or two-component fillers on the mechanical properties of EMCM composite material. The research thoroughly analyzed the porosity, macroscopic mechanical properties, and microstructure of the EMCM. The results revealed that increasing the filler content up to 40% significantly enhances the elastic modulus and compressive strength of the EMCM specimens, despite an increase in porosity. Specific filler combinations, such as SiO2/CaO and CaO/Fe2O3, exhibit superior performance. Additionally, Fe2O3 helps prevent sedimentation, enhancing the material’s uniformity. A comprehensive performance evaluation using the Entropy Weighted Technique for Order Preference by Similarity to Ideal Solution (EW-TOPSIS) method showed that specimens containing CaO/Fe2O3 exhibited optimal performance, even when considering cost factors.

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Laboratory evaluation on water-based and flexible epoxy/SiO<sub>2</sub> nanocomposites to enhance anti-sliding effectiveness of pavement

Cited by 3 publications

References 39 publications

Integrated design of a robust superhydrophobic cement mortar layer via sizing sand grains

Integrated design of a robust superhydrophobic cement mortar layer via sizing sand grains

Effect of epoxy value on the rheological properties and microcosmic mechanism of WER emulsified asphalt

Effect of fly ash chemical components on epoxy mortar composite material performance

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