FUEL
·
2025
·
IF 7.5
Miaolin Lv,Lunjing Yan,Huifang Niu,Cen Li,Meijun Wang,Jiao Kong,Weiren Bao,Jiancheng Wang,Liping Chang
In this paper, the transformation characteristics of coal tar asphalt with different structures (Medium-temperature asphalt (MCTP), High-temperature asphalt (HCTP), Coal liquefaction asphalt (CLP), and Refined asphalt (RCTP)) in the mesophase state were investigated, and the electrochemical performance of mesophase asphalt-based porous carbon was analyzed. The results show that the mesophase asphalt has a higher aromatic carbon ratio and lower aliphatic carbon ratio than the raw asphalt. CLP has the lowest aromaticity (f ar = 68.25 %), which is easy to condense but weak in reactivity. Although the aromaticity of MCTP is higher than that of CLP, its light component content is high and difficult to condense. Therefore, MCTP mesophase asphalt (MCTP-MP) has a larger interlayer spacing than CLP mesophase asphalt (CLP-MP). HCTP has abundant solid carbon and aromaticity, and the carbon layer structure of HCTP mesophase asphalt (HCTP-MP) tends to be more disordered (I D /I G = 0.6). RCTP has better condensation degree and suitable lightweight components (9.75 %) than other asphalts. This makes RCTP mesophase asphalt (RCTP-MP) have higher graphitization degree (I D /I G = 0.31) and good reactivity, and its derived porous carbon (RCTP-MPH) layer structure is efficiently stacked, which is more conducive to charge transport. The specific capacitance of RCTP-MPH is as high as 331F/g (0.5 A/g), and the power density of the RCTP-MPH electrode material is as high as 31.43 Wh/kg at a power density of 198.13 W/kg. After 10,000 cycles (5 A/g), the coulombic efficiency of the RCTP-MPH electrode material can reach 92.99 %.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Qun Lu,Aimin Sha,Wenxiu Jiao,Ke Shi,Ze Peng,Ruimeng Song
In response to the growing demand for energy-efficient and sustainable materials in road construction, this research presents a pioneering method to enhance the engineering application of bio-oil rejuvenated asphalt . Initially, aged asphalt was rejuvenated by blending with 6% castor oil . Subsequent modifications included introducing varying concentrations of polyphosphoric acid (PPA) (0%, 0.5%, 1.0%, 1.5%), combined with differing sulfur levels (15% and 30%). The rheological properties of the resulting asphalt binders were assessed using rotational viscometer (RV), asphalt binder crack device (ABCD), and dynamic shear rheometer (DSR) tests, while fourier transform infrared spectroscopy (FTIR) test was employed to reveal the interaction mechanism. The study’s key findings reveal that incorporating 15% sulfur significantly reduces asphalt viscosity , effectively lowering the mixing and compaction temperatures by approximately 17 °C and 15 °C, respectively. Besides, rutting factor ( G * / sin δ ) and fatigue life ( N f ) results unveil a positive connection between PPA content, high-temperature stability, and fatigue resistance. Furthermore, the grey relational analysis emphasizes a strong correlation between G * / sin δ and R 3.2 (grey relational degree of 0.986), indicating that the recovery rate partially reflects high-temperature performance. The FTIR analysis demonstrates that bio-oil primarily contributes through physical blending, whereas PPA undergoes chemical transformations, and the combination of sulfur with asphalt results in both physical and chemical reactions. In conclusion, this research emphasizes the synergistic potential of bio-oil, sulfur, and PPA in enhancing recycled asphalt performance. For optimal warm mix efficiency and road performance, incorporation of 15% sulfur and 1.0% PPA in bio-rejuvenated asphalt is recommended. These findings provide substantial advantages in reducing reliance on petroleum asphalt and mitigating carbon emissions , contributing to sustainable infrastructure development.
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
Materials Research Express
·
2021
·Vol. 8
·期 3
·035501
·
IF 1.62
Chao Li,Guodong Zeng,Min Zhou,Yang Fang,Zongwu Chen,Yishen Xu,Siyin Ding,Miao Yuan,Hao Li,Shaopeng Wu
Combination of styrene-butadiene-styrene (SBS) polymer and layered double hydroxides (LDHs) has commonly applied in asphalt to improve anti-ultraviolet aging performance, but it can not afford the reparation of cracks caused by aging of asphalt. Also, few researches focused on the structure and performance changes during synthesis of LDHs. Based on self-healing performance of asphalt, the produced cracks can be repaired by microwave heating. Therefore, the controllable synthesis of traditional microwave absorber SiC to wrap LDHs (SwL) at different temperatures was studied in this paper, and the effects of different SBS/SwL combination on the microwave absorption and exothermic properties of modified asphalt were studied. The SwL was firstly synthesized at 200 °C, 350 °C, 500 °C and 650 °C. Then morphology, phase composition, chemical structure of different SwL were evaluated. Finally, based on different combination of SBS and SwL, the effects of SBS/SwL on the microwave absorption in the frequency band from 1 GHz to 18 GHz and exothermic characteristics at 2.45 GHz of the modified asphalt were analyzed. The results show that SwL can be synthesized successfully, and the processing temperature significantly affects the structure of SwL. The SBS/SwL-200 modified asphalt has the best microwave absorption and exothermic properties. When used in self-healing asphalt, it is more advantageous to choose 200 °C as the synthesis temperature of SwL.
研究领域:
材料科学
·
土木工程
·
化学工程
✓ 已验证
DOI
高影响因子
Road Materials and Pavement Design
·
2022
·
IF 3.805
Gongying Ding,Xin Yu,Junyan Wang,Xingmin Liang
The influence of formulation components of cold-mixed epoxy asphalt (CMEA) on the corresponding mechanical properties was studied. For the purpose of minimising the number of experiments, the simplex-centroid design method was used as an effective tool for experimental design. Original asphalt, solvent, epoxy resin and additives were taken into consideration as important factors at different levels. Tensile strength and elongation at break at 25 ℃ and -10 ℃ were chosen as the key responses. Moreover, the workability performance and optimised CMEA were studied. Finally, the tensile cross-sectional fracture mechanism of CMEA was studied with scanning electron microscopy (SEM). The results indicated that the simplex-centroid design was an effective method for optimising the composition of the CMEA. Good agreement was found between the proposed model and experimental measurements. The CMEA pot life first increased and then decreased with increasing environmental temperature, and solvent in the CMEA could weaken the ductility.
研究领域:
材料科学
·
土木工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS AND STRUCTURES
·
2019
·Vol. 52
·期 4
·1-11
·
IF 2.548
Si Jingjing,Li Yang,Yu Xin
Cold-mixed epoxy asphalt (CEA) is an eco-friendly material for steel bridge deck pavements. The effects of the asphalt on the curing behavior and mechanical properties of the CEA were studied. The pot life, curing characteristics, and curing kinetics of CEA blends were investigated by rotational viscosity testing, dynamic shear rheological analysis, and fluorescence microscopy. The results showed that the CEA pot life increased with asphalt content, and the curing apparent activation energy \( E_{k} \) of CEA-0.4 was more than two times higher than that of the epoxy resin. The curing reaction between the epoxy resin and curing agent was hindered by the asphalt. According to the FTIR and DSC results, the curing degree of the CEAs decreased with asphalt content. The elongation at break of the CEAs increased, while the tensile and adhesion strength decreased with asphalt content.
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
Materials
·
2020
·Vol. 13
·期 23
·5580
·
IF 3.057
Gongying Ding,Xin Yu,Fuqiang Dong,Zezhong Ji,Junyan Wang
Acidic aggregates have the merits of high strength and good abrasion resistance capacity. However, its poor adhesion with asphalt binder constrains its application in pavement construction. Among these, the granite aggregate is the typical one. Therefore, this study modified granite aggregates’ surface to improve their adhesion property with the asphalt binder. Specifically, the silane coupling agent (SCA) KH-560 was adopted to achieve the modification purpose. Subsequently, asphalt mixtures with modified and unmodified granite, basalt, and limestone were subjected to the boiling test, immersion test, and freeze-thaw splitting test to estimate the asphalt adhesion property. Moreover, a molecular dynamic simulation was employed to characterize the asphalt-aggregate interface from the molecular scale. The radius distribution function (RDF) and interaction energy were used as the primary indicators. The results showed that the SCA could efficiently improve the adhesion between asphalt and granite aggregates, comparable with the alkaline aggregates. In terms of the molecular scale, the incorporation of SCA could significantly increase the concentration distribution of asphalt molecules on the aggregate surface. Meanwhile, the interaction energy was correspondingly increased due to the considerable growth of non-bond interaction.Keywords:acidic aggregate;silane coupling agent;asphalt mixture;asphalt-aggregate interface;molecular dynamics
研究领域:
材料科学
·
道路工程
·
计算模拟
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2018
·
IF 3.485
Jingjing Si,Zhaoxia Jia,Junyan Wang,Xin Yu,Yang Li,Fuqiang Dong,Ruiling Jiang
The research evaluated the properties of cold-mixed epoxy asphalt (EA) and cold-mixed epoxy styrene–butadiene–styrene (SBS)-modified asphalt (ESA) for paving steel-deck bridges. Compared with ESA, EA showed longer pot life and better processability at ambient temperature, as revealed by curing rheology analysis. The cured EA showed higher glass-transition temperature, superior thermal stability, tensile strength and elongation at breaking than ESA. These may be as a result of: (i) the high thermal stability of asphalt, (ii) the formation of a cross-linking network in the cured material, and (iii) the good compatibility between the epoxy resin and the asphalt.
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
CONSTRUCTION AND BUILDING MATERIALS
·
2023
·
IF 7.4
Haopeng Zhang,Qingshan Xie,Haibo Ding,Yanjun Qiu
In cold region, crystalline wax can continuously precipitate from the asphalt binder distilled from the crude oil after cooling, which seriously damages cracking resistance of the asphalt pavement at the low-temperature. Few researchers have developed wax inhibitors (WIs) to inhibit wax crystallization in the asphalt field and existing WIs only focus on direct interaction with wax crystals. Herein, the ionic liquid (IL) modified with different commonly used concentrations of graphene oxide (GO) (0.3 %, 0.6 %, 0.9 %, 1.2 % IL) was synthesized as novel WI through in situ polymerization from the new perspective that the dispersed asphaltenes could inhibit wax crystal network. The successfully synthesized nanocomposites at the optimal content (900 ppm) and component (IL-0.6 %GO) reduced wax precipitation temperature (WPT) of asphalt binders by 14 °C, and the synergistic effect of IL and GO in the nanocomposite has most significant effect on wax inhibition than the existing WIs (IL and Poly(methyl methacrylate) (PMMA)). IL indirectly inhibits wax crystal network by dispersing asphaltenes through π - π interactions and charge transfers from IL to asphaltenes, which is superior to the direct reduction of wax crystals by PMMA. Therefore, it is very effective and promising to synthesize nanocomposites as wax inhibitors from the new perspective of dispersing asphaltenes compared with existing WIs to improve the low-temperature performance of asphalt.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2022
·Vol. 9
·期 6
·065304
·
IF 2.025
Min Dai,Chang-ming Chen,Zhan Wang,Wen-hao Pan,Xiao-wei Sun,Ning Tang,Li-mei Wu
The performance of asphalt mixtures containing reclaimed asphalt pavement (RAP) are strongly influenced by the degree of blending between RAP and virgin bitumen. In the aim of revealing the blending interface, the present work reports an experimental investigation on the blending degree between modified bitumen and RAP (or aged bitumen). A montmorillonite-rhodamine composite modifier was prepared as a tracer, which has exclusive element and fluorescence. Using microscopic test technique, the blending process of and the crack process of RAP bitumen was observed, and the blending image of new reclaimed asphalt mixture was obtained. The interface was investigated through image processing and machine learning. Based on the results, the montmorillonite modifier slightly affected on the softening point and penetration of virgin bitumen after addition. The blending interface was engagement like gears. The optimal heating temperature range is 110 °C to 115 °C for forming a better adhesive interface between RAP and modified bitumen. Moreover, the interface transition zone thickness between RAP and modified bitumen was measured to be 4 to 8 μm.
研究领域:
材料科学
·
土木工程
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2020
·
IF 0
Xing Liu,Hong Yuan Xing,Gang Liu,Wei Fu,Wen Bo Zeng
Based on the rheological property master curve, a new definition of ageing index was proposed for styrene-butadiene-styrene block copolymer (SBS) modified bitumen. The UV ageing resistance of the combined-modifier modified SBS bitumen was evaluated. Twelve different methods of combined modification were designed with three kinds of modifiers: ultraviolet absorber (Tinuvin 770), organic montmorillonite (OMMT) and layered double hydroxide (LDHs). With modified SBS bitumen, short-term ageing (TFOT) and laboratory ultraviolet ageing (UV) were performed. The dynamic shear rheometer (DSR) was used to perform frequency sweep test on the samples before and after ageing. The rheological property master curve was obtained by fitting the constitutive model equation. Based on the rheological property master curve, a new definition ageing index was proposed for SBS bitumen to evaluate the modified bitumen with different combined-modifier. The results show that the ageing index could effectively evaluate the UV ageing resistance of SBS bitumen. The evaluation results show that the combined-modifier bitumen exhibits better anti-ultraviolet ageing effects than a single modifier. Among them, the combined-modifier modes of 0.3%Tinuvin770+5%OMMT and 0.6%Tinuvin770+2.5%LDHs performed.
研究领域:
材料科学
·
土木工程
✓ 已验证
DOI
Journal of Cleaner Production
·
2022
·
IF 11.072
Jingjing Si,Junyan Wang,Xin Yu,Gongying Ding,Wei Ruan,Miaomiao Xing,Renxuan Xie
High temperature and oxidation are two of the most critical factors that cause epoxy asphalt aging. This paper aims to clarify the variation of mechanical performance and structure of effect of cold-mixed epoxy asphalt (CEA) after thermal-oxidative (TO) aging. The mechanical properties of CEA were studied by tensile tests and dynamic mechanical analysis . The microstructure of CEA was studied by Fourier transform infrared spectrum , X-ray photoelectron spectroscopy, SEM , and fluorescence microscopy. The results indicated that the tensile strength of CEA increased to 5.16 MPa, the elongation at break decreased to 50.3%, and the T g decreased significantly after TO aging. TO aging made the epoxy resin in CEA post-cure, oxidate, degrade and the cross-linked network break. Furthermore, the asphalt particles in CEA agglomerated and oxidized.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Hang Yu,Yafeng Qian,Wenjing Xia,Tao Xu
The interfacial compatibility and fusion behaviors of emulsified asphalt and aged asphalt on reclaimed asphalt pavement (RAP) aggregates greatly affects cold recycled mixture’s properties. To evaluate the compatibility and reveal fusion mechanism between shape-memory hydrogenated epoxy modified emulsified asphalt (SHEA) and aged asphalt on RAP aggregates, fused asphalt specimens were prepared. The dynamic evolution changes in molecular weight, surficial morphology, micromechanical characteristics, chemical composition and phase structure of asphalt specimens during the fusion progress were investigated. Results indicate that a concentration gradient occurs between SHEA and aged asphalt, where high-molecular-weight components from aged asphalt diffuse into SHEA, promoting molecular-level compatibility. This compatibility exhibits a more uniform molecular distribution, enrichment of long-chain structures, reduced asphaltenes content, and improved overall performance. Also, long-chain SMHE molecules in SHEA form complex aggregations with aged asphalt. Three-dimensional SMHE network permeates into asphalt matrix, filling voids and contributing to reduced surface roughness, decreased hardness, and improved viscoelasticity. The surficial undulation of fused specimen is small, and its viscoelasticity is restored. The presence of –C–O– and sulfoxide absorption peaks indicates that chemical reaction between SHEA and aged asphalt occurs, resulting in uniform fusion at a molecular level. Next, X-ray diffraction reveals significant changes in interplanar spacing and crystallite size. Crystalline structures resembling MoS₂ and sodium silver chloride are identified in fused asphalt, further supporting molecular-level interaction between the above components. These findings offer a theoretical basis for performance enhancement of SHEA cold recycled mixture.
研究领域:
土木工程
·
材料科学
·
道路建设
·
高分子科学
·
化学工程
·
机械工程
✓ 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）