Article
Engineering, Mechanical
Chao Wang, Yanguang Sun, Zhengyang Ren
Summary: This paper presents a viscoelastic fatigue and fracture (VEFF) modeling and its preliminary application to asphalt binder under cyclic loading. Both traditional time sweep (TS) fatigue test and linear amplitude sweep (LAS) test are performed. The failure definition is unified from the peak of fracture energy. The binder fatigue performance is dominated by its resistance to crack propagation. A mechanistic criterion paradigm is established to be independent of the strain ramping rate in LAS and strain amplitude in TS tests. The proposed model is verified by various binders, demonstrating the reasonable use of the LAS as an accelerated fatigue protocol.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Construction & Building Technology
Ziyang Wang, Weiwei Lu, Kai Liu, Songtao Lv, Xinghai Peng, Shuo Yang, Sha Ding
Summary: In this research, two high-content RAP recycled asphalt mixtures (50% and 60% RAP-RAM) were prepared using Styreneic Methyl Copolymer (SMC) regenerant. The relationships between strength and temperature/loading rate were investigated through indirect tensile (IDT) strength and fatigue tests. A master curve model of indirect tensile strength and loading rate was established using linear and Sigmoidal functions. The fatigue equation based on the fatigue stress ratio took into account factors such as temperature and loading rate, providing a more realistic reflection of the mix's fatigue performance.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Mechanics
Hui Li, Xue Luo, Yuqing Zhang, Zhen Leng
Summary: This study proposes a viscoelastic fracture mechanics-based fatigue life model to predict the fatigue failure life of asphalt-based composites. The model parameters were obtained and verified through various tests on the composites. The results show that the fatigue life of the composites is affected by temperature and loading level.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Xin An, Riran Wang, Xiaolong Kang, Jinchao Yue
Summary: The non-linear viscoelastic behavior of asphalt materials at high load levels is often disregarded, resulting in underestimated fatigue durability. This study conducted incremental stress sweep tests to determine the threshold load amplitudes of graphene oxide-modified asphalt binders in the non-linear viscoelastic domain. The fatigue life of the binders was quantified using a simplified viscoelastic continuum damage model, incorporating both linear and non-linear dynamic shear modulus. The results showed that the addition of graphene oxide nanoparticles improved the fatigue life of the asphalt binder, and considering non-linear viscoelastic behavior and aging effects increased the prediction accuracy of fatigue life for both the base binder and graphene oxide-modified asphalt binders.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Civil
Song Zhou, Yan Li, Kunkun Fu, Xiaodi Wu
Summary: The paper models fatigue progressive damage in fiber-reinforced composite materials, successfully predicts fatigue life under different layup sequences, and simulates delamination behavior. The proposed fatigue finite element model shows good agreements with experimental data.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Chao Wang, Guanyu Gong, Yifang Chen, Yanguang Sun
Summary: Understanding the healing behavior of asphalt binder is crucial for fatigue modeling. This study compares the damage-healing behavior of various binders using the newly developed LASH procedure and proposes a simplified S-LASH procedure for efficient evaluation. The results demonstrate the impact of penetration grade and aging on healing performance and suggest critical testing conditions for reliable assessment of healing characteristics.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Engineering, Mechanical
Zeyu Zhang, Markus Oeser
Summary: The study found that cyclic nonlinear viscoelastic loads have a negative impact on the fatigue life of asphalt binder, and the proposed damage accumulation model (Oeser and Zhang model) showed good agreement with experimental results, indicating its reliability and effectiveness.
INTERNATIONAL JOURNAL OF FATIGUE
(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
Yang Zhang, Jinglin Zhang, Tao Ma, Haonan Qi, Conglin Chen
Summary: Applying the VECD method to predict the fatigue life of asphalt mixtures has limitations in terms of temperature and loading frequency. By introducing the time-strain superstition principle and frequency-strain superstition principle, fitting errors can be reduced and more accurate predictions can be obtained.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Chemistry, Physical
Kwanho Lee, Seongkyum Kim
Summary: The generation of waste tires is increasing, and waste tire pyrolysis is an alternative method for recycling. In this study, carbon black from pyrolysis was used to improve the permanent deformation properties of asphalt binder. Laboratory tests showed positive effects on asphalt performance, except in extremely low temperatures.
Article
Construction & Building Technology
Yanqiu Bi, Fucheng Guo, Jiupeng Zhang, Jianzhong Pei, Rui Li
Summary: The study investigates the correlations between asphalt binder/mastic properties and dynamic modulus of asphalt mixture, as well as the influence of various asphalt and aggregate parameters on the dynamic modulus master curve.
Results show that the type of binder and ratio of filler to binder significantly affect the dynamic modulus master curve of asphalt mixture, while the type of gradation, aggregate, and filler have a slight impact.
Among the prediction models, the improved Hirsch model shows the most consistent results, while the M-vertical bar E*vertical bar models predict lower values than measured values, and both models perform well under certain conditions such as dense gradation and appropriate filler-to-binder ratio.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Yunliang Li, Xin He, Haijiao Sun, Yiqiu Tan
Summary: A viscoelastic-plastic constitutive model was constructed to study the viscoelastic-plastic damage of CACB, analyzing the effects of material composition and microstructure on the damage process. It was found that stress ratio and temperature have significant effects on plastic damage, while CACB with A/C = 0.8 exhibits more stable mechanical properties.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Yue Xiao, Xiwen Chang, Boxiang Yan, Xiaoshan Zhang, Mujaheed Yunusa, Ruien Yu, Zongwu Chen
Summary: Fluorescence microscopy technology was used to characterize the microscopic morphology of SBS modifier in asphalt binder and the impact of different SBS content, shear temperature, and shear rate on the SBS modifier was discussed. Results show that the area ratio of SBS particle is linearly related to SBS content, and shear temperature and rate also affect the size of SBS particles significantly.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Navid Hemmati, Jihyeon Yun, Hyunhwan Kim, Moon-Sup Lee, Soon-Jae Lee
Summary: This study investigates the effectiveness of processed oil in modifying PG 64-22 and PG 76-22 binders. The results show that the addition of processed oil decreases the viscosity of the binders, negatively affects the rutting resistance, improves the fatigue cracking performance, and significantly enhances the thermal cracking properties.
Article
Engineering, Mechanical
Zhe Zeng, Y. Richard Kim, B. Shane Underwood, Murthy Guddati
Summary: Fatigue cracking is a common distress in asphalt pavement, and various models have been developed to predict its life using laboratory tests. The simplified viscoelastic continuum damage (S-VECD) model has been widely used and continuously improved. However, its ability to predict material response and the impact of different fitting procedures on prediction accuracy are still uncertain.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)