The Performance of Super Absorbent Polymer (SAP) Water-Retaining Asphalt Mixture

Geng, Jiuguang; Chen, Mingyuan; Shang, Tao; Li, Xun; Kim, Youngsoo Richard; Kuang, Dongliang

doi:10.3390/ma12121964

Cited by 19 publications

(6 citation statements)

References 18 publications

(19 reference statements)

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“…The heat absorption rate of asphalt pavements is so high that their daytime temperature exceeds 60 • C and, thus, the ambient temperature of the road is also significant [7]; the heat stored in the pavement is released at night, contributing to increasing the ambient temperature. In turn, the high temperature of the road surface is the main cause of rutting deformation [8]. Therefore, reducing the heat absorption of asphalt pavements has become crucial for preventing the urban heat island effect and reducing the rutting deformation of roads [9].…”

Section: Introductionmentioning

confidence: 99%

Development of Super Road Heat-Reflective Coating and Its Field Application

Yi¹,

Jiang²,

Li³

et al. 2019

Coatings

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Heat-reflective coatings, used to reduce the asphalt pavement temperature and urban heat island effect, have a good cooling effect; coating development, however, generally focuses on cooling. This study aims to design a heat-reflective coating with both durability and cooling effect by considering the functions of each component, improving the coating bond strength and abrasion resistance, and conducting laboratory tests and test section verification. The coating developed exhibits bond strength and abrasion resistance 20% and 49%, respectively, higher than those of ordinary coatings. The experiments reveal a cooling effect of red coating up to 10.2 °C, a bond strength of up to 1.20 MPa at 25 °C, and an abrasion rate of up to 25% after 60 min; the cooling effect is basically the same as that for traditional heat-reflective coatings, but the bond strength and abrasion resistance significantly improved. In the analysis of the test section, the cooling effect reaches 7.0 °C, the performance of anti-skid decreases little, and the coating is still usable normally after 4 months.

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Section: Introductionmentioning

confidence: 99%

Development of Super Road Heat-Reflective Coating and Its Field Application

Yi¹,

Jiang²,

Li³

et al. 2019

Coatings

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“…The permeable asphalt pavement has been widely used because it has multiple functions, such as noise mitigation [106] and safety enhancement in the rain [107]. It doesn't need any adjustment to the structure and materials of permeable pavement for evaporative cooling in practice, which will not damage the original pavement performance.…”

Section: Evaporative Coolingmentioning

confidence: 99%

“…It doesn't need any adjustment to the structure and materials of permeable pavement for evaporative cooling in practice, which will not damage the original pavement performance. For water retaining asphalt pavements, researchers mainly focused on the water-retaining materials and pavement performance [107]. Jiang et al (2016) [90] obtained a water retaining asphalt pavement through grouting a water-retaining slurry, prepared using fly ash and calcium hydroxide, into porous asphalt pavement.…”

Section: Evaporative Coolingmentioning

confidence: 99%

Review of regulation techniques of asphalt pavement high temperature for climate change adaptation

Gong

Zhang

et al. 2022

J Infrastruct Preserv Resil

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Asphalt pavement is vulnerable to the temperature rising and extremely high-temperature weather caused by climate change. The regulation techniques of asphalt pavement high temperature have become a growing concern to adapt to climate change. This paper reviewed the state of the art on regulating asphalt pavement high temperature. Firstly, the influencing factors and potential regulation paths of asphalt pavement temperature were summarized. The regulation techniques were categorized into two categories. One is to regulate the heat transfer process, including enhancing reflection, increasing thermal resistance, and evaporation cooling. The other is to regulate through heat collection and transfer or conversion, including embedded heat exchange system, phase change asphalt pavement, and thermoelectric system. Then, the regulation techniques in the literature were reviewed one by one in terms of cooling effects and pavement performance. The issues that still need to be improved were also discussed. Finally, the regulation techniques were compared from the perspectives of theoretical cooling effects, construction convenience, and required maintenance. It can provide reference for understanding the development status of asphalt pavement high temperature regulation techniques and technique selection in practice.

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“…It is soluble in neither inorganic nor organic solvents and has a speci c crosslinking degree (CD) and network structure [2]. SARs have a good adsorption performance, water retention capacity, pressure resistance, and heat resistance and have been used widely used in agriculture, forestry, and horticulture [3,4], industry [5][6][7], health supplies [8], and other elds [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of a Novel Bentonite Composite Superabsorbent Resin Based on Starch

Guo

Wang

et al. 2022

Advances in Materials Science and Engineering

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A superabsorbent resin (SAR) is a functional polymer with a high water absorption capacity, which has been widely used in many fields. In this study, a modified aqueous solution polymerization process was adopted to synthesize a SAR. The optimum synthetical mass ratios of starch, bentonite, potassium persulfate (K2S2O8), and N,N′-methylene-bis-acrylamide to acrylic acid (AA) were 7.14%, 3.57%, 0.29%, and 0.057%, respectively, and the neutralization degree of AA was 50%. The molecular structure and the surface morphologies of the SAR were confirmed using Fourier transform infrared spectroscopy and scanning electron microscopy. The SAR had a water absorbency of 1300 mL/g in distilled water and 56 mL/g in 0.9 wt.% NaCl solution. The water absorption rate reached 72.65% of the maximum water absorption in 1 hour and swelled to equilibrium in 4 hours. The water retention rate was 45.86% after heating and evaporation at 150°C for 1 hour. The moisture absorption rate reached 28.2% after 10 days of placement. The modified technology provides a new synthetic method for production of SARs, which is characterized by a lack of nitrogen protection, the direct use of raw AA and potato starch, a simplified synthesis process, substantially improved efficiency, and lower production costs.

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The Performance of Super Absorbent Polymer (SAP) Water-Retaining Asphalt Mixture

Cited by 19 publications

References 18 publications

Development of Super Road Heat-Reflective Coating and Its Field Application

Development of Super Road Heat-Reflective Coating and Its Field Application

Review of regulation techniques of asphalt pavement high temperature for climate change adaptation

Synthesis and Characterization of a Novel Bentonite Composite Superabsorbent Resin Based on Starch

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