Article
Construction & Building Technology
Hongjie Hao, Zhihui Chen, Peiliang Cong, Zhiyu Han
Summary: The waste polyurethane (WPU) particles are used to modify asphalt binder in order to obtain modified asphalt binders with excellent properties. The addition of WPU particles improves the low temperature crack resistance of the base asphalt binder but impairs the property of SBS modified asphalt binder. The thermal storage stability of the WPU particles modified asphalt binder is poor but can be improved by using SBS. The rod-shaped WPU particles enhance the rutting resistance of the asphalt binder, however, their structure is destroyed during aging process.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Xiaolong Yang, Chunhong Peng, Jiangcai Chen, Guiyong Liu, Xinyi He
Summary: By analyzing the rheological properties of bio-asphalt, the effectiveness of bio-asphalt as a substitute for petroleum asphalt has been explored. The addition of bio-asphalt improves the low-temperature rheological properties of modified asphalt while reducing the high-temperature rheological properties. The combination of bio-asphalt, SBS, and PPA exhibits excellent performance in high and low-temperature conditions. This study reveals the mechanism of bio-asphalt improving the compatibility of SBS and PPA in asphalt.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Wenhui Zhao, Jiuguang Geng, Mingyuan Chen, Xu Li, Yanhui Niu
Summary: The content of SBS modifier in SBS modified asphalt greatly affects its physical and chemical characteristics, but determining the SBS content after aging is still a challenge. In this study, FTIR and potentiometric titration tests were used to detect the SBS content of aged binders, and it was found that these tests can effectively predict the SBS content and analyze the aging degree of SBS modified asphalt.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shengfeng Yang, Kezhen Yan, Wenyao Liu
Summary: This study extends the evaluation of aging performance in warm-mix-modified asphalt by combining rheological characterization and viscoelastic mechanical modeling. The results show that nanoparticles have no significant effect on the complex modulus of aged binders, but they do improve fatigue resistance. Furthermore, the viscoelastic mechanical characteristics of warm-mix-modified asphalt are not affected by aging durations.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Xiaobing Chen, Yunfeng Ning, Yongming Gu, Ronglong Zhao, Jinhu Tong, Juntian Wang, Xiaorui Zhang, Wei Wen
Summary: This study investigates the effects of multiple cycles of aging and rejuvenation on SBS-modified asphalt-binders, finding that three types of rejuvenators can soften the stiffness and restore microstructures of aged asphalt-binders. The Type I rejuvenator shows potential for achieving desired effects under multiple rejuvenation cycles. However, the aging resistance of SBSMA gradually decreases over these cycles, ultimately limiting the number of repeated rejuvenation cycles.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Shanglin Song, Meichen Liang, Linbing Wang, Dongna Li, Meng Guo, Luchun Yan, Xingjun Zhang, Weixun Ding
Summary: This study reveals the evolution law of natural aging of SBS-modified asphalt under the complex adverse climate environment in cold and arid regions, and analyzes the contribution rates of various environmental factors. The results show that natural aging deteriorates the viscoelastic properties of asphalt, increases the risk of fatigue cracking and low temperature cracking, but improves the deformation resistance and rutting resistance at high temperature.
Article
Green & Sustainable Science & Technology
Qishi Li, Henglong Zhang, Caijun Shi, Zihao Chen
Summary: The addition of Sasobit/epoxidized soybean oil (Sasobit/ESO) compound as a warm-mix additive has positive effects on the performance of styrene-butadiene rubber modified asphalt binder (SBRMA), reducing preparation temperature, increasing performance grade at intermediate and high temperatures, and improving short- and long-term aging resistance. The modifying effect of Sasobit/ESO is only physical, with enhanced short-term aging resistance particularly notable when considering its warm-mix effect.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Bangwei Wu, Chufan Luo, Zhaohui Pei, Chuangchuang Chen, Ji Xia, Peng Xiao
Summary: Polymer additives have been widely used, but their effects on the durability of asphalt binders have not been thoroughly investigated. Adding polymer modifiers to SBS asphalt binders improves aging resistance, with high viscosity modifier (HVM) showing the best results. Various aging indicators can predict the aging degree of polymer modified asphalt binders.
Article
Green & Sustainable Science & Technology
Yu Song, Shaopeng Wu, Anqi Chen, Yuanyuan Li
Summary: This paper investigated the physical, rheological, and UV aging resistance of LDHs + SBS MABs under various preparation parameters to determine their suitability for engineering applications. The results showed that the crystal and chemical structures of LDHs remained unchanged after asphalt modification. The optimal preparation parameters of LDHs + SBS MABs were determined. The addition of LDHs improved the high-temperature performance of MABs but slightly decreased the low-temperature performance. The UV aging resistance of LDHs + SBS MABs was significantly enhanced.
Article
Construction & Building Technology
Zeyang Chen, Wenke Huang, Kuanghuai Wu, Guihai Nie, Yuqi Zheng, Jianwen Song, Xu Cai, Jianbo Wu, Jiandong Huang
Summary: This study analyzes the aging performance of SBS modified asphalt binder used in fluid mastic asphalt (FMA). Through testing its macro and micro properties, it is found that heating the asphalt binder at ultra-high temperatures can lead to performance degradation, especially in the aging process at 225 degrees Celsius. This is of significance for the construction process of FMA.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Chemistry, Physical
Abdulrahman Hamid, Hassan Baaj, Mohab El-Hakim
Summary: Using geopolymer as a modifier for asphalt binders and mixtures has gained attention in recent decades. This study aimed to investigate the effect of geopolymer (GF) and styrene-butadiene-styrene (SBS) modifiers, as well as their combination, on the rheological properties and performance of asphalt binders. The findings showed that the additives reduced the temperature sensitivity of the binders and improved their fatigue resistance and tensile strength. The modified asphalt mixtures also exhibited enhanced resistance to cracking in dry and freeze-thaw conditions.
Article
Construction & Building Technology
Xiaolong Yang, Guiyong Liu, Hongliu Rong, Yongjun Meng, Chunhong Peng, Minqiang Pan, Zhikang Ning, Guangchen Wang
Summary: The mechanical properties of composite modified asphalt and the interaction mechanism of each modifier were investigated. The results showed that PPA and BA can improve the storage stability of SBS modified asphalt, and the composite modified asphalt with lower SBS content still has excellent performance.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Jing Xu, Jianzhong Pei, Jun Cai, Tao Liu, Yong Wen
Summary: The study demonstrates that adding oils can improve the performance of SBS modified asphalt, with bio-oil showing higher efficiency than REOB. Tests at different aging states indicate that low-temperature performance depends on the ability to relax internal stress. FTIR scanning and aging indices show that performance-related characteristics and chemical changes mainly occur during long-term aging.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Alireza Sadat Hosseini, Pouria Hajikarimi, Mostafa Gandomi, Fereidoon Moghadas Nejad, Amir H. Gandomi
Summary: This study aimed to develop prediction models for the complex shear modulus (G*) and phase angle (θ) of rubber-modified bitumens, using a robust genetic programming method. The developed models were found to accurately calculate G* and θ at different temperatures and loading frequencies, with the modifier dosage being the most influential input variable. The study also demonstrated the linear behavior of G* and θ of the original bitumen in reflecting the effect of temperature and loading frequency on the viscoelastic behavior of the modified bitumen.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Bo Liang, Yufan Chen, Fang Lan, Jianlong Zheng
Summary: This paper systematically explores the feasibility of evaluating the rheological and aging behavior of functionalized SBS-modified asphalt binders. The results show that SBS functionalization improves the performance and aging resistance of asphalt binders. The Ea values calculated based on RV tests provide a scientific and effective method for analyzing the viscous flow behavior and designing high capability materials for pavement.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Changyun Shi, Huanan Yu, Guoping Qian, Xi Li, Xuan Zhu, Ding Yao, Chao Zhang
Summary: This research focused on asphalt mixture gradation design and found that a proper gradation can provide excellent volumetric and mechanical properties. A two-parameter Weibull distribution model was proposed to describe the aggregate gradation, and the applicability of the Weibull model and the fractal model was compared for different gradations. The influence of gradation characteristics parameters on mixture volumetric indexes was evaluated through 332 groups of field and experimental gradation designs. Factors impacting the uniaxial compressive strength (UCS) of porous asphalt concrete were assessed using grey correlation analysis, and a multiple regression model for UCS of mixture was developed. The results showed linear correlations between gradation characteristics parameters and mixture volumetric indexes, and it was feasible to predict the UCS of asphalt mixture using known material parameters.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Huanan Yu, Hao Hu, Xuan Zhu, Guoping Qian, Chao Zhang, Ding Yao, Ping Li
Summary: Three tests were conducted to evaluate the fatigue-creep damage coupling effect of asphalt mixture under different loading frequencies. The elastic modulus was chosen as a damage variable for evaluation, and the Chaboche model and Kachanov model were used to analyze the evolution of fatigue damage and creep damage, respectively. The results showed that the damage decreased and the growth rate of the damage evolution curve decreased with the increase in loading frequency. It was found that the direct tensile fatigue damage of the asphalt mixture was a coupling effect of fatigue-creep damage, and the creep effect was more obvious during this coupling effect. The proposed model can better characterize the fatigue-creep damage coupling effect and damage evolution process of asphalt mixtures under different loading frequencies.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Construction & Building Technology
Tuo Huang, Zeqian Cao, Songtao Lv, Huanan Yu, Xinghai Peng, Haohao Jiang, Lu Wu
Summary: Antistripping agents (BWH551 and LY) and nanomaterial (Nano-SiO2) were used to improve the water damage resistance of SBS modified asphalt. Three types of compound modified asphalt were prepared by incorporating various modifiers into SBS modified asphalt. The physical and rheological properties were tested, and the adhesion of the specimen was evaluated. The test results showed that BWH551, LY, and Nano-SiO2 had favorable modification effects to obtain high-performance asphalt.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Huanan Yu, Hang Jiang, Guoping Qian, Xuan Zhu, Ding Yao, Chao Zhang, Jie Li, Huiping Zhong
Summary: Previous research found compatibility problems between epoxy and asphalt, which were improved by adding complex auxiliary agents. Carboxyl functional groups were added to MWCNTs under mixed acid conditions to reduce agglomeration and achieve better combination with epoxy. The optimal mixing ratios of MWCNTs and epoxy were determined to be 6% EP + 1.4% MWCNTs and 20% EP + 0.125% MWCNTs.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Huanan Yu, Jinguo Ge, Guoping Qian, Chao Zhang, Wan Dai, Ping Li
Summary: Waste cooking oil (WCO) can be used as a rejuvenator to restore the physical and rheological properties of aged SBS asphalt. The diffusion characteristics of WCO greatly affect its rejuvenation effect. A molecular dynamics method was used to evaluate the diffusion characteristics and rejuvenation mechanism of WCO in aged SBS asphalt. The results showed that temperature had a limited promoting effect on WCO diffusion, and smaller molecular weight led to faster diffusion rate. Sulfoxide group generated by asphalt aging increased intermolecular forces, resulting in self-aggregation and performance degradation. WCO molecules dispersed asphaltene and reduced the negative impact of asphalt aging.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Construction & Building Technology
Guoping Qian, Xinyue Luo, Huanan Yu, Changyun Shi, Chao Zhang, Ping Li
Summary: Although shear strength is important in asphalt mixtures, it is not included in traditional pavement design. The damage shape in uniaxial penetration and circle shear tests accurately reflects practical asphalt pavement damage. This study conducted various tests to evaluate shear strength in different conditions and found that SBS-modified asphalt mixtures have higher shear strength than conventional mixtures. The shear performance of mixtures is influenced by asphalt binders, aggregates, and mineral powder.
Article
Construction & Building Technology
Huanan Yu, Wan Dai, Guoping Qian, Chao Zhang, Jinguo Ge, Tangxin Xie
Summary: In this study, the microscopic contact characteristics of aggregates during asphalt mixture compaction process were evaluated using CT scanning and image processing techniques. A novel index of contact chains was proposed to analyze the characteristic parameters of contact chains during compaction. The results showed that the strength of the asphalt mixture mainly came from the contact chains formed by 4.75-9.5 mm and 9.5-13.2 mm grade aggregates.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Changyun Shi, Guoping Qian, Changhao Hu, Huanan Yu, Xiangbing Gong, Chao Zhang, Zichao Huang, Taojun Li
Summary: The permanent deformation diseases of asphalt pavement, such as rutting and slippage, are mainly influenced by its shear resistance. The shear properties of asphalt mixtures can more directly reflect the compaction quality of mixtures. This research evaluated the shear performance of asphalt mixtures through aggregate skeleton shear tests and investigated the effect of test conditions on shear properties.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Huanan Yu, Sihang Zhou, Guoping Qian, Chao Zhang, Changyun Shi, Ding Yao, Jinguo Ge
Summary: This research compared the performance of asphalt mixtures with different design methods and analyzed their void distribution and skeleton structure stability. The water stability and dynamic modulus of the mixtures were evaluated under different design methods. The results showed that the Balanced design method had a larger number of coarse aggregate contact points, while the Marshall and Superpave design methods had higher residual strength ratios. The research also revealed the influence of skeleton structure on the dynamic modulus of the mixtures. This study has important implications for improving the durability of asphalt mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Huanan Yu, Chao Zhang, Guoping Qian, Jinguo Ge, Xuan Zhu, Ding Yao, Changyun Shi
Summary: In this study, the impact of coarse aggregate morphology on the mechanical performance of asphalt mixture was evaluated. Coarse aggregates with different wearing times were prepared and corresponding asphalt mixture samples were compacted. The morphology characteristics of the aggregates were evaluated using an image measurement system. The viscoelastic properties and permanent deformation resistance of the asphalt mixture were evaluated through dynamic modulus tests and repeated loading creep tests. The research results can provide guidance for selecting coarse aggregate based on morphological characteristics and improving the performance of asphalt mixture.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Xuan Zhu, Huanan Yu, Guoping Qian, Ding Yao, Wan Dai, Hu Zhang, Jie Li, Huiping Zhong
Summary: In this study, a discrete element method (DEM) model was established to evaluate the micromechanical behavior of asphalt mixture. It was found that the movement of coarse aggregate was less than that of asphalt mortar in the uniaxial compression test, and the movement of coarse aggregate was affected by its particle size and location. Additionally, the change of direction in the contact force of coarse aggregate skeleton was the main reason for stress decrease when the asphalt mixture specimen exceeded the peak strength.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Zhiyang Liu, Haipeng Wang, Xiangbing Gong, Peng Cui, Hongrui Wei
Summary: This study aims to investigate the rheological characteristics of asphalt mastic affected by mineral aggregates and reveal the fundamental mechanism of interfacial interaction. The results suggest that the aggregates increase the stiffness and toughness of mastic within the linear and nonlinear viscoelastic regions. The macrorheological characteristics are closely related to the nanostructures and intermolecular interactions of bitumen-mineral systems.
Article
Construction & Building Technology
Huanan Yu, Jinguo Ge, Guoping Qian, Changyun Shi, Chao Zhang, Wan Dai, Tangxin Xie, Tengfei Nian
Summary: The bonding mechanism between SBS asphalt and aggregates under UV aging conditions was investigated using molecular and dynamic simulations. The study found that the adhesive strength between SBS asphalt and alkaline aggregates was higher, with limestone exhibiting the highest adhesive work. Van der Waals interactions were the main contributors to the adhesive work, while electrostatic interactions played a crucial role in influencing variations in adhesive work among different aggregates. Aging-induced fracture of SBS materials resulted in a reduction in adhesion effectiveness, but increased polarity of aged asphaltene and colloid enhanced electrostatic interactions and elevated adhesive work.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Zhongming He, Tangxin Xie, Huanan Yu, Jinguo Ge, Wan Dai
Summary: In this study, different nanoquantum dots were introduced to modify graphene/titanium dioxide in order to improve the ultraviolet absorption capacity of inorganic nanoparticles and slow down the aging of asphalt pavement caused by ultraviolet light. The results showed that the introduction of various quantum dots enhanced the ultraviolet absorption capacity of nano-TiO2 and improved the high-temperature rheological properties of asphalt. Moreover, it was found that the introduction of various quantum dots reduced the aging effect of ultraviolet light on asphalt by lowering the sulfoxide index, carbonyl index, and root mean square roughness Sq of modified asphalt.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
He Wang, Yu Lu, Shiqiang Li, Huanan Yu, Jing Bian
Summary: This paper proposes a method for pole-to-ground fault location in DC distribution network based on high-frequency zero-mode current sparsity. The method effectively solves the problem of poor fault location accuracy caused by the inconspicuous characteristics of pole-to-ground fault. It establishes the equivalent circuit of the fault and constructs an equation to obtain the vector of high-frequency zero-mode current. Simulation experiments show that the proposed method accurately locates fault points with low requirements for measurement points and has tolerance to transitional resistance and noise interference.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
