ENERGY AND BUILDINGS
·
2023
·
IF 6.7
Meng Jia,Aimin Sha,Wei Jiang,Xinzhou Li,Wenxiu Jiao
Currently, functional pavement materials become a research hotpot for road researchers. This paper aims to develop a phase change heat storage asphalt pavement material and then design phase change heat storage asphalt mixtures with active cooling ability. The synthesized polyurethane-based solid–solid phase change material (PUSSPCM) with suitable phase change temperatures, desirable thermal energy storage capacity and excellent phase change cycling stability can meet the active cooling demand of asphalt pavement. There are also excellent leakage resistance, volume stability and chemical stability that enable withstanding the harsh condition of asphalt pavement. Therefore, the PUSSPCM can be considered as a promising phase change filler. Subsequently, the phase change heat storage asphalt mixtures are prepared by the equal volume replacements of limestone filler with PUSSPCM. The replacements can improve the high-temperature stability and low-temperature cracking resistance whereas weaken the water stability of an asphalt mixture. When the replacement amount is no more than 40 vol%, the phase change mixtures can satisfy the pavement performance requirements. The replacements increase the heat absorption capacity but decrease the heat transfer rate, which leads to decrease in the temperature rising rate of the asphalt mixture with more PUSSPCM.
研究领域:
材料科学
·
土木工程
·
热能工程
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Wenxiu Jiao,Jiaxing Zhang,Zhiyong Zhang,Aimin Sha,Meng Jia
Adding phase change materials (PCMs) to asphalt pavements can effectively reduce temperature sensitivity and delay snow and ice accumulation. This study aims to develop solid-solid phase change materials (SSPCMs) for asphalt pavements, with a focus on winter road de-icing. First, the suitability of polyethylene glycol (PEG) and polytetramethylene ether glycol (PTMEG) with varying molecular weights as soft segments was systematically evaluated based on phase change performance, thermal stability, phase change cycling stability, and specific heat capacity. SSPCMs were synthesized using a two-step solution polymerization method, with successful synthesis confirmed by FTIR analysis. The influence of different soft-to-hard segment ratios on phase change performance was also examined. PTMEG2000 exhibited excellent performance, with an exothermic phase change temperature range from 8.5°C to -1.2°C and an enthalpy of 94.3 J/g. Its thermal decomposition onset temperature was 266.05°C, and its performance remained stable after 20 thermal cycles. The incorporation of hard segments led to a reduction in both phase change enthalpy and the initial phase change temperature. At a molar ratio of 4,4′-diphenylmethane diisocyanate (MDI) to PTMEG2000 of 2.4:1, the phase change temperature range was 4.1°C to -5.1°C, with an enthalpy of 37.1 J/g, demonstrating great potential as a de-icing material for roads in cold climates.
研究领域:
材料科学
·
土木工程
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Enhui Yang,Bonan Ma,Wentao Jia,Yunchuan Du,Hai Yuan,Haibo Ding,Haibo Di,Feiyun Yuan,Yanjun Qiu
The formation of ice on pavement in winter has a negative impact on road traffic safety . This study improves the anti-icing property of pavements by preparing a superhydrophobic coating for asphalt pavements to ensure traffic safety. Here, a superhydrophobic coating with a hierarchical structure (SCH) was prepared using a resin, nano-silica powder, and other materials. The maximum contact angle was 160.5°. Through scanning electron microscope , confocal 3D microscope, and contact angle tests , it was observed that the SCH has the most complex surface texture ( R a =16.69 μm, R z =65.02 μm) and significant hydrophobic performance (contact angle=160.5°) than the superhydrophobic coating with a single-level structure surface (SCM, SCN). Based on the ice-road shear adhesion theoretical results and ice-road shear test results, it can be concluded that, at a temperature of −10 °C, SCH with a hierarchical surface structure has stronger anti-icing property than SCM and SCN. Pavement friction tests reveal that SCH has a minimal impact on the friction coefficient ( μ =0.643), still meeting the requirements for anti-skid property. Furthermore, accelerated wear tests indicate that SCH maintains sufficient wear resistance on the pavement. After accelerated wear tests, compared with SCM and SCN, it still has the best anti-icing property. SCH exhibits significant hydrophobic, anti-icing, anti-skid, and anti-wear properties, providing reference for the development and implementation of novel anti-icing technologies for pavement.
研究领域:
材料科学
·
交通工程
✓ 已验证
产品关联
DOI
高影响因子
Road Materials and Pavement Design
·
2019
·
IF 1.98
Xuejuan Cao,Mei Deng,Boming Tang,Yongjie Ding,Xiaoyu Yang
Nitric oxide (NO) emitted from vehicle exhausts are associated with adverse health effects on the public. This study prepared a graphitic carbon nitride (g-C3N4)/TiO2 composite using melamine and titanium dioxide (TiO2) and then applied the composite on chip seal for the photocatalytic removal of NO. The g-C3N4/TiO2 composite was synthesised by an ultrasonic-assisted solid-phase synthetic method. The results of X-ray powder diffraction, Fourier-transform infrared spectroscopy, and a scanning electron microscope indicated that g-C3N4 and TiO2 were successfully synthesised and most of the sheet structures of g-C3N4 were attached by approximately spherical TiO2 particles. The UV–Vis and PL characterisation suggested that optical absorption range of TiO2 was broadened and the separation of electronic-holes was hindered, which contributed significantly to the enhancement of the visible-light photocatalytic activity. The loading capacity of 0.0092 kg/m2 g-C3N4/TiO2 composite on chip seal specimens had the highest NO removal efficiency of 31.41% within 30 min.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Kun Xiong,Jiupeng Zhang,Yinzhang He,Junbo Li,Mingliang Zhang,Rui Li,Jianzhong Pei,Yuanyuan Li,Lei Lyu
Cracking in asphalt pavement may lead to structural distress while existing crack repair materials have significant shortcomings in terms of cost and construction efficiency. This study incorporates mineral powder into the polyurethane grouting materials to provide a more economical and durable solution for repairing cracks in asphalt pavement. The results of bonding and tensile tests show that excessive mineral powder may deteriorate the mechanical properties of polyurethane grouting materials, which is caused by the agglomeration of mineral powder observed by the microscale characterization. Characterization tests indicate that ultraviolet exposure results in the evolution of the chemical components and thermal stability of polyurethane grouting materials, subsequently causing the degeneration in the mechanical properties. The addition of mineral powders was found to increase the tensile strength of polyurethane grouting materials after Ultraviolet aging by 12 %, while the elongation at break measured in tensile tests remained essentially unchanged. The results of the splitting test, bending test, and immersion Marshall test prove the enhanced low-temperature property and moisture resistance of mineral powder-modified polyurethane grouting materials as compared to the styrene-butadiene-styrene emulsified asphalt. The economic analysis shows that this study presents a practical approach to cost-effective asphalt pavement crack repair, offering insights for enhancing the durability of asphalt pavements.
研究领域:
土木工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY AND BUILDINGS
·
2022
·
IF 7.201
Aimin Sha,Jin Zhang,Meng Jia,Wei Jiang,Wenxiu Jiao
Effective cool pavement technologies with using phase change materials (PCMs) are of great significance to alleviate Urban Heat Island (UHI) effect and improve the functionality, safety and service life of asphalt pavements. This study focuses on the development of polyurethanes (PUs) as solid–solid PCMs (s-s PCMs) that are suitable for asphalt pavement cooling utilizations. First, a range of PUs were synthesized through two-step polymerization reactions. Successful synthesis was confirmed by the Fourier transform infrared (FTIR) spectroscopy test. Next, characterizations were performed on the synthesized PUs. It is demonstrated that a PU with a larger isocyanate content usually sustains a higher temperature without liquid leakage. The applicable s-s PCM among the synthesized PUs is M_PU5 with 4,4′-diphenylmethane diisocyanate (MDI) as the isocyanate and the molar ratio of MDI and polyethylene glycol (PEG) being 5, due to its desirable latent heat storage capacity of 93.5 J·g −1 and phase change temperatures of 36–48.3 °C, excellent thermal stability and reliability, and its strong ability to withstand harsh conditions of asphalt pavements. Finally, the feasibility of M_PU5 for actively cooling asphalt pavements has been verified by outdoor test. The investigated results provide a basis and reference for building cool asphalt pavement systems with using s-s PCMs.
研究领域:
土木工程
·
材料科学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2020
·Vol. 7
·期 2
·025303
·
IF 1.929
Pan Sun,Xiayi Liang,Yue Ding,Tingwei Wang,Shanglin Xiang,Dongyu Cai
The anti-slip (AS) layer of the cement concrete pavement (CCP) can probability decrease traffic accidents and extend the service life of the road. Epoxy resin has excellent adhesion and mechanical strength, making it possible in this field. Herein, a flexible waterborne epoxy resin (WER) without a small molecule emulsifier was synthesized by bisphenol A epoxy resin, poly (propylene glycol) diglycidyl ether (PDE), diethylenetriamine (DETA). The mechanism of the group reaction was characterized by fourier transform infrared (FTIR), and dynamic scanning calorimetry (DSC) determined the heat of curing of WER. Then, the physical properties of WER were enhanced by the silane coupling agent modified nano-silica (SCA-NS) and the composite's water absorption rate and mechanical propriety were evaluated. Finally, the pavement performance of the AS layer was prepared and tested as well as compared with the commercial waterborne epoxy resin (CWER) and emulsified asphalt (EA). The result shows EA has low durability and adhesion strength than epoxy resin. The small molecule emulsifier and low-flexible resistance of CWER decrease water stability and anti-sliding durability of the AS layer. Due to applied nanomaterial reinforced and without small molecule emulsifiers, the WER base AS layer shows extremely high adhesion strength, water stability, and skid-resistance durability at addition 3 wt% of SCA-NS, which have a great potential for CCP.
研究领域:
材料科学
·
土木工程
·
交通运输工程
✓ 已验证
DOI
高影响因子
Thermal Science and Engineering Progress
·
2024
·
IF 5.1
Weijie Mao,Biao Ma,Siyuan Guo,Xiaoqing Wang
The melting of permafrost can cause serious damage to road structures. This study prepares a phase change geotextile (PCG) with heat absorption and waterproofing properties and proposes a new type of cooling structure called a phase change energy storage embankment (PCESE). A finite element model of the road is established to quantify the artificial permafrost table (APT), mean annual ground temperature (MAGT) at the bottom of the embankment, and mean daily cooling rate (MDCR) of the asphalt pavement surface under different PCESE structures. This study focuses on exploring the effects of the type of epoxy resin composite phase change material (ERPCM), dosage of ERPCM , and position of the PCG on various indices. The Entropy-TOPSIS method is used to evaluate the comprehensive performance of the PCESE and determine the optimal structure and optimization strategy. The results demonstrate that the addition of PCG to an embankment always improves the APT and MDCR, but does not necessarily reduce the MAGT. The optimal type of ERPCM , dosage of ERPCM , and position of PCG are ERPCM2, 12 kg/m 2 , and 3.0 m, respectively. The dosage of the ERPCM had the highest positive correlation with comprehensive performance. Considering the distribution of comprehensive performance and coefficient of variation under different structures, the recommended type of ERPCM, dosage of ERPCM, and position of the PCG are ERPCM1, 12 kg/m 2 , and 2.5 m, respectively.
研究领域:
土木工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Dong Zhang,Meizhu Chen,Zongwu Chen,Pengxiang Li,Zhuhai Shao,Xingfei Liu,Pinpin Liu
Polyethylene glycol (PEG) demonstrates significant advantages in asphalt pavement thermal regulation owing to high latent heat and adjustable phase transition temperatures. However, its limitations, including liquid-phase leakage and low thermal conductivity, restrict practical applications. This study developed a functionalized expanded graphite (FEG) matrix via acid oxidation, where oxygen-containing groups establish hydrogen bonds with PEG, forming PEG/FEG CPCM with enhanced thermal conductivity and encapsulation stability. Structural characterization showed FEG interlayer spacing increased from 0.3379 nm to 0.3439 nm, with surface oxygen content rising from 2.66 % to 12.33 % (predominantly −OH/−COOH groups). Hydrogen bonds forming between FEG and PEG restrict molecular chain migration, thereby improving encapsulation stability. The optimized PEG/FEG CPCM exhibited latent heats of 141.60 J/g (melting) and 134.12 J/g (crystallization), a 24.9 % lower supercooling degree (11.39°C vs. 15.17°C), and 11.58-fold higher thermal conductivity (3.6257 W/(m·K) vs. 0.3132 W/(m·K)) compared to pure PEG. Hydrogen bonding increased the decomposition temperature of PEG/FEG CPCM by 10.7°C to 306.4°C, with only a 0.9 % reduction in phase transition temperature and a 1.0 % latent heat loss after 100 thermal cycles. Field tests showed that PEG/FEG-modified asphalt mixtures extended heating/cooling durations by 2.1 %/15.0 %, mitigating pavement thermal distress. The study advances the application of PEG-based CPCMs to enhance pavement durability, mitigate UHI effects, and conserve energy.
研究领域:
材料科学
·
土木工程
·
热工学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Hang Diao,Bo Peng,Wenjing Kuang,Tianqing Ling,Ying Gao,Kaiyuan Luo
The escalating urban air pollution caused by vehicular nitrogen oxides (NO x ) necessitates sustainable solutions. Solar-driven photocatalytic NO removal represents a green approach, yet challenges remain in developing cost-effective photocatalysts with high removal efficiency. This study through the Fe-TiO 2 combined with thermal polycondensation method with g-C 3 N 4 build heterojunction generated Fe-TiO 2 /g-C 3 N 4 photocatalyst, in order to improve its NO catalytic efficiency. The optimized photocatalyst achieves a single-cycle NO removal rate of 52.3 %, demonstrating the 10.7 % improvement compared to pure TiO 2 . Following five cycles, the decay rate is only 5.52 %, which is significantly lower than the 12.45 % of TiO 2 , thus indicating superior long-term stability. Microscopic characterization shows that Fe can induce the generation of oxygen defects inside TiO 2 to promote the separation of photogenerated electron-hole pairs; and induce the formation of a built-in electric field to enhance the separation of photogenerated charges with the heterojunction formed by the construction of g-C 3 N 4 . Moreover, the designed photocatalytic semi-flexible pavement incorporating this photocatalyst exhibits 65.33 % NO removal efficiency per cycle, 10.95 % higher than traditional TiO 2 based systems, with a total decay rate of 1.71 % after five cycles. Additionally, the pavement demonstrates excellent mechanical properties, including fivefold higher rutting resistance than conventional asphalt pavements. This study provides a new sustainable pavement removal scheme for mitigating urban exhaust agglomeration pollution.
研究领域:
环境科学
·
材料工程
·
催化化学
·
土木工程
·
城市可持续发展
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Meng Jia,Fan Zhang,Aimin Sha,Zhe Li,Wentong Wang,Wenxiu Jiao
Phase change materials (PCMs) hold promising potential for regulating asphalt pavement temperatures during the summer. To enhance the suitability of polyurethane-based solid–solid phase change materials (PUSSPCMs), this study focuses on optimizing their structure and performance. A series of PUSSPCMs were synthesized with varying soft-to-hard segment ratios and soft segment molecular weights. Their high-temperature leakage resistance, phase change behavior and thermal stability were systematically evaluated, to identify the optimal formulations. Subsequently, a SMA-13 phase change asphalt mixture incorporating a selected PUSSPCM was designed. The effect of the PUSSPCM, as a functional filler, on both the pavement and thermal properties of the mixture was evaluated. Results indicate that the PUSSPCM structure critically affects leakage resistance at elevated temperatures. Increasing the hard segment content significantly improves leakage resistance, enabling the PUSSPCM to maintain structural integrity during the high-temperature paving of phase change asphalt mixtures. A higher molecular weight of polyethylene glycol (PEG) requires a correspondingly higher proportion of hard segments for leakage prevention. An increase in PEG molecular weight or soft-to-hard segment ratio usually leads to elevated phase change temperature and enthalpy. Irrespective of the composition, PUSSPCMs can perform excellent volumetric, chemical, and phase transition stability during hot-mix asphalt construction. P8000–6 as a preferred PUSSPCM enhances high-temperature stability and low-temperature crack resistance, but reduces the moisture resistance of the asphalt mixture. The phase change asphalt mixture exhibits a reduced heating rate, maintaining a temperature difference of over 3 °C for up to 250 min, with a maximum difference of 3.7 °C. The addition of P8000–6 functional filler has minimal impact on the thermal conductivity of the asphalt mixture. However, it effectively moderates temperature fluctuations during heating by increasing the heat absorption capacity.
研究领域:
土木工程
·
材料科学
·
高分子科学
·
热工学
·
交通基础设施
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Peng Yang,Xiao-Nan Su,Jun-Feng Su,Qin-Yu Xing,Xin-Yu Wang,Qian Sun,Zhi-Yong Tan
Bitumen oxidative aging leads to pavement deterioration through increased stiffness and cracking, necessitating effective rejuvenation strategies. Current approaches utilizing waste soybean cooking oil (WSCO) are limited by rapid evaporation and leaching. This study presents an innovative solution through silica microencapsulation of waste soybean cooking oil (microWSCOs) synthesized via optimized oil-in-water emulsion with tetraethyl orthosilicate. The microcapsules exhibit uniform spherical morphology (10-50 μm diameter) with high encapsulation efficiency (92±3%) and thermal stability (<5% mass loss at 180°C for 2 h). Controlled release kinetics under simulated traffic loading (0.7 MPa, 10 Hz) demonstrate 62.4±2.1% cumulative rejuvenator release after 10,000 cycles, effectively restoring aged bitumen properties: softening point reduction of 15.2±0.8°C, penetration increase of 28.3±1.5%, and complex modulus decrease of 34.7±2.3%. Environmental resistance testing reveals 89.2±3.5% WSCO retention following 500 h UV irradiation (0.89 W/m²) and 7-day water immersion. The microencapsulation system demonstrates dual sustainability benefits by valorizing waste oil while significantly extending pavement service life through targeted, long-term rejuvenation.
研究领域:
材料科学
·
土木工程
·
可持续能源
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）