Article
Construction & Building Technology
Zuzhong Li, Huijie Liu, Weixi Chen, Yuan Li, Zepeng Zhao, Yanping Yin, Mengyuan Li
Summary: In this study, four types of SBS copolymers with different residual SB di-block content were incorporated into base asphalt to prepare SBSMA. The effects of aging on the molecular weight, chemical structure evolution, thermal stability, and rheological properties of the asphalt binders were investigated. The results showed that asphalt with lower residual SB content had better high temperature performance, and the molecular weight and chemical structure of SBS and SBSMA changed after aging.
MATERIALS AND STRUCTURES
(2022)
Article
Construction & Building Technology
Shuai Zhang, Haokai Hong, Henglong Zhang, Zihao Chen
Summary: This study aimed to improve the anti-aging properties of asphalt by adding multi-dimensional nanomaterials. The experiments showed that MDN can decrease the increase of softening point, viscosity aging index, and complex modulus aging index of asphalt, while increasing retained penetration and phase angle aging index.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Jing Xu, Lijun Sun, Jianzhong Pei, Bin Xue, Tao Liu, Rui Li
Summary: Using AFM, researchers studied the aging effects on SBSMA and base binder at micro-scale. Results showed differences in microstructure and macro-properties between SBSMA and base binder during aging process, with observable aging hardening in both micro- and macro-scale. Adhesion evolution and chemical changes were also observed, with long-term aging contributing the most to SBS polymer degradation and asphalt binder oxidation.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Chemical
Huiqiang Chen, Ge Tang, Xiong Wang
Summary: By comparing and analyzing the viscosity and creep tests, the study explores the performance degradation of new and old asphalt during the aging process in thermal regeneration. The results show that the aging speed of recycled asphalt is faster, with some technical indicators changing significantly, and there is an induced aging effect between new and old asphalt.
Article
Environmental Sciences
Osires de Medeiros Melo Neto, Leda Christiane de Figueiredo Lopes Lucena, Ingridy Minervina Silva, Luciana de Figueiredo Lopes Lucena, Ana Maria Goncalves Duarte Mendonca, Albaniza Maria da Silva Lopes, Flavia Maria Mendes da Silva, Alex Guedes de Amorim, Hugo Ribeiro de Oliveira Neto
Summary: Recycling agents contribute to the improvement of new asphalt mixtures by adding reclaimed asphalt pavement (RAP). Soybean oil sludge fatty acid, a waste byproduct of soybean oil refining, was used to modify the asphalt binder PG 64-XX. The use of fatty acid significantly reduced the stiffness and viscosity of the control asphalt binder, leading to lower mixing temperatures.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Construction & Building Technology
Naipeng Tang, Weidong Huang, Gengren Hao
Summary: The study investigated the aging mechanism of HPMBs with different formulations, revealing that both polymer and sulfur contribute to improving rheological properties and aging resistance of HPMBs, but excessive polymer and sulfur may not be beneficial. Additionally, potential bias should be considered when using GPC curves and FTIR spectra to evaluate chemical properties changes of HPMBs during aging.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Yuanyuan Pan, Dongdong Han, Tao Yang, Dong Tang, Yuxia Huang, Ningxing Tang, Yongli Zhao
Summary: The short- and long-term effectiveness of hot in-place recycling (HIR) was evaluated through field measurements and laboratory tests. The results show that HIR with good construction quality effectively restores high-temperature stability and maintains low-temperature performance and moisture susceptibility. The study emphasizes the importance of rejuvenator application, construction control, and longer monitoring of pavement conditions to optimize maintenance decisions.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Yuetan Ma, Pawel Polaczyk, Wei Hu, Miaomiao Zhang, Baoshan Huang
Summary: A new method called the ignition oven method was developed to quantify the effective mobilized RAP content during HIR procedures, which has been proven effective and comparable to the FTIR methods. The temperatures and dosage of additives play a critical role in improving the mobilization of RAP and should be optimized for achieving sustainable pavement.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Yuquan Yao, Jiangang Yang, Jie Gao, Mulian Zheng, Jing Xu, Wei Zhang, Liang Song
Summary: In this study, a systematic procedure for designing the material composition of hot in-place recycling asphalt mixture (HIRAM) and a strategy for optimizing construction parameters were proposed. RAP variability, construction costs, and carbon emissions were considered in the design process. The proposed strategy was successfully validated in engineering practice, improving the accuracy of HIRAM gradation design and reducing construction costs and CO2 emissions.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Chuanqi Yan, Weidong Huang, Quan Lv, Peng Lin
Summary: This study investigates the impact of field short-term aging on HCPMA binders, finding that the actual field aging level lies between RTFOT and STOA. The degradation of polymer in HCPMA exerts more influence on the binder's viscoelastic response rather than its stiffness.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2021)
Article
Engineering, Civil
Jianwei Fan, Tao Ma, Guangji Xu, Yajing Zhu, Chengjia Han, Yiming Zhang
Summary: This paper proposes a micro-macro evaluation method for the diffusion of rejuvenator into aged asphalt in hot in-place recycling, considering the cooling process of the recycled layer after paving. The material parameters are calculated using the backward regression method, and the temperature field of the recycled layer is obtained through finite-element simulation. The cooling process is incorporated into a laboratory diffusion experiment using the time-domain inverse method. The study finds that the thermophysical parameters of the recycled and original asphalt mixtures have a significant influence on the cooling process and rejuvenator diffusion. The nonuniformity of the diffusion on the surface and inside the recycled layer can be eliminated over time.
JOURNAL OF TRANSPORTATION ENGINEERING PART B-PAVEMENTS
(2022)
Article
Construction & Building Technology
Martin Hugener, Di Wang, Augusto Cannone Falchetto, Laurent Porot, Patricia Kara De Maeijer, Marko Oreskovic, Margarida Sa-da-Costa, Hassan Tabatabaee, Edoardo Bocci, Atsushi Kawakami, Bernhard Hofko, Andrea Grilli, Emiliano Pasquini, Marco Pasetto, Huachun Zhai, Hilde Soenen, Wim Van den Bergh, Fabrizio Cardone, Alan Carter, Kamilla Vasconcelos, Xavier Carbonneau, Aurelie Lorserie, Goran Mladenovic, Tomas Koudelka, Pavel Coufalik, Runhua Zhang, Eshan Dave, Gabriele Tebaldi
Summary: This study, organised by the RILEM technical committee, evaluated the effect of asphalt recycling agent (ARA) on the binder properties of recycled asphalt mixture. The results highlighted the importance of using a dynamic shear rheometer to evaluate binder blends containing ARA. The study recommended restoring the original material properties while balancing high-temperature characteristics and cracking resistance.
MATERIALS AND STRUCTURES
(2022)
Article
Green & Sustainable Science & Technology
Songtao Lv, Long Hu, Chengdong Xia, Milkos Borges Cabrera, Yanpeng Guo, Chaochao Liu, Lingyun You
Summary: This study investigates the effect of fish scale powder (FSP) on the performance of asphalt binders, finding that FSP enhances adhesion, viscoelastic properties, temperature susceptibility, and resistance to permanent deformation of asphalt, with little effect on aging and cracking resistance at low content. The physical mixing between FSP and asphalt binder results in a storage-stable product, indicating promising and feasible utilization of FSP as a bio-modifier for asphalt binders.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Albaniza Maria da Silva Lopes, Osires de Medeiros Melo Neto, Leda Christiane de Figueiredo Lopes Lucena, Maria das Vitorias do Nascimento, Mateus Valdevino de Siqueira, Talita Miranda de Sousa, Arthur Felipe de Farias Monteiro
Summary: This study focused on the analysis of asphalt binder aging, exploring the effects of thermal-oxidative aging, photo-oxidative aging, and moisture on the physical and chemical properties of asphalt binders. The results revealed different reaction mechanisms during thermal and photochemical aging processes, with greater oxidation observed under UV radiation. Aging led to an increase in binder stiffness and a decrease in fatigue resistance and permanent deformations. The effects of UV radiation were found to be less pronounced than expected, but the study emphasized the importance of including UV radiation and moisture in laboratory aging studies.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Environmental Sciences
Francesca Russo, Rosa Veropalumbo, Ludovico Pontoni, Cristina Oreto, Salvatore Antonio Biancardo, Nunzio Viscione, Francesco Pirozzi, Marco Race
Summary: The continuous growth of waste is causing increasing environmental concerns globally, leading to the loss of raw materials and production factors. This research explored the potential of using different waste materials as fillers for hot asphalt mastics, finding that certain waste materials performed better in terms of mechanical and environmental efficiency compared to traditional limestone fillers.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Transportation
Yue Hu, Lijun Sun, Huailei Cheng, Yi Li
Summary: This research aimed to investigate the attenuation mode of the layer modulus of asphalt pavement in accelerated pavement testing (APT). Two non-destructive testing (NDT) methods, FWD and PSPA, were used to obtain the layer moduli of asphalt pavement. The variation patterns of layer moduli obtained by FWD and PSPA tests were compared and it was found that the surface layer modulus increases and then decreases with the APT load repetitions, while the base layer modulus always declines. The backcalculated base layer modulus decline is described by Eb = 128000 * N ^ 0.1096.
INTERNATIONAL JOURNAL OF TRANSPORTATION SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Tianfei Chen, Dongliang Zhao, Lijun Sun, Shi Li, Binbin Feng
Summary: This paper proposes a new model based on the RPCA framework for detecting moving objects, using non-convex low-rank approximation and total variational regularization. Experimental results show that the proposed method outperforms existing methods in terms of moving object detection and foreground extraction.
SIGNAL IMAGE AND VIDEO PROCESSING
(2023)
Article
Chemistry, Analytical
Lijun Sun, Binbin Wang, Yaoming Ma, Xingdong Shi, Yan Wang
Summary: Using satellite monitoring and temperature data, this study analyzed the ice phenology events of 40 high-elevation lakes on the Tibetan Plateau and their influencing factors. The results showed that with climate warming, the freeze-up start date of 24 lakes was delayed, the break-up end date of 7 lakes was advanced, and the ice coverage duration of 13 lakes was shortened.
Article
Chemistry, Multidisciplinary
Xiao Hu, Jiahao Li, Yue Hu, Lijun Sun
Summary: The paper conducts a pavement deflection test on an in-service highway asphalt pavement at different temperatures in different seasons. It establishes a more suitable temperature correction model for the deflection basin of asphalt pavement by determining the representative temperature of the asphalt layer and the effective influence distance of temperature on the deflection basin. The results show that the temperature at the middle layer depth of the asphalt layer is more suitable as the representative temperature, and the deflection change rate before and after the temperature correction at a radial distance of 20 cm is more appropriate for the temperature correction.
APPLIED SCIENCES-BASEL
(2023)
Article
Green & Sustainable Science & Technology
Weiying Wang, Huailei Cheng, Lijun Sun, Bin Xu
Summary: This study regards asphalt rubber (AR) binder as a two-phase system to clarify the aging and rejuvenation mechanisms. The particle effect (PE) plays a dominant role in affecting unaged AR binders, while the liquid effect (LE) dominates the aging AR binders. Statistical analysis reveals that the rheological properties of liquid phases are mainly affected by chemical fractions.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Computer Science, Artificial Intelligence
Lixun Huang, Lijun Sun, Tianfei Chen, Qiuwen Zhang, Linlin Huo, Weihua Liu
Summary: This paper investigates the impact of compensation measures on the convergence speed of iterative learning control (ILC) systems with data dropouts and time delays. A predictor is developed to calculate the input not received on time due to data dropouts and time delays, based solely on the prior knowledge of both ILC controllers and transmission channels. Simulation results demonstrate that the object with prediction compensation outperforms the one with input-hold compensation, as it tracks the expected trajectory faster.
JOURNAL OF INTELLIGENT & FUZZY SYSTEMS
(2023)
Article
Construction & Building Technology
Zhanchuang Han, Dongyu Jiang, Liping Liu, Lijun Sun
Summary: This study aims to clarify the manufacturing process of low-temperature beam specimens by simulating the secondary thermal compaction of the overlying hot mix asphalt mixture layer. The applicability of indirect tensile tests, low-temperature bend tests, and SCB tests to low-temperature performance evaluation of cold recycled mixture (CRM) is evaluated. Different design schemes of emulsified asphalt CRM are analyzed, and the mixture design scheme of 3% latex +5% regenerant is found to significantly improve the low-temperature performance of CRM.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Yunyi Li, Minhua Shao, Lijun Sun, Xinmiao Wang, Shizhao Song
Summary: This research examines the impact of adjusting expressway rates on the traffic flow of cars with seven seats or less from the perspective of price elasticity of demand. The study utilizes data from the Shanghai Expressway Electronic Toll Collection (ETC) from 2019 to 2020 and applies Empirical Mode Decomposition (EMD) to optimize the data. The findings indicate that demand's price elasticity increases with the increase in charge amount (distance).
Article
Chemistry, Multidisciplinary
Tianfei Chen, Qinghua Xiang, Dongliang Zhao, Lijun Sun
Summary: This paper proposes a robust PCA method for image denoising based on nonconvex low-rank approximation and total variational regularization (TV). The method improves the denoising performance by accurately approximating the low-rank matrix and utilizing the robustness of the method. It is noteworthy that the method does not require labeled images and can be applied to different scenarios.
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Tu Ha, Shengjun Liu, Libin Lin, Wei Liu, Hongwei Zhang, Lijun Sun, Xuemin Zhao
Summary: A large number of tunnels are built in permafrost regions in China every year. Most of these tunnels in cold regions suffer from freezing damages. Therefore, there are many technical problems that urgently need to be solved in the design, construction, operation, and maintenance of tunnels in cold regions, with insulation, antifreeze, and anti-drainage being key technical problems. This paper focuses on the completed highway tunnels in Inner Mongolia and designs thermal insulation, antifreeze, and anti-drainage technology for tunnels in the cold area of Jinpen Bay. The research in this paper can effectively reduce the probability of tunnel freezing damage, ensure the safety of the long-term operation of the tunnel lining structure, and greatly reduce maintenance costs, leading to good economic and social benefits.
Review
Construction & Building Technology
Ziming Liu, Lijun Sun
Summary: The application of recycled asphalt materials in pavement rehabilitation has been developed over the past decades. Cold recycling, as a recycling technology, has gained more attention. This paper focuses on the effect of compaction methods on cold recycling mixtures (CRM) and reviews various topics related to laboratory compaction methods, mechanical performance, microstructure, relation to field compaction, and environmental and economic benefits of CRM. The results show that gyratory and vibratory specimens have more air voids but smaller average air void size. The vibratory compaction method has higher evaluation in terms of environmental and economic benefits. However, the internal structure and mechanical properties of laboratory CRM cannot fully replicate those of field cores. Further studies should consider optimizing the compaction process.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lianfang Wang, Lijun Sun, Quan Lv
Summary: This study aims to enhance the modulus and low-temperature properties of high-modulus asphalt mixes. By incorporating rubber powder and rock asphalt, composite-modified asphalts and mixes were prepared and their mechanical and viscoelastic properties were investigated. The results showed that the combination of rubber powder and rock asphalt improved the high-temperature performance and low-temperature weakening of the mixes.
APPLIED SCIENCES-BASEL
(2023)
Article
Computer Science, Artificial Intelligence
Di Wang, Haiyang Shi, Lijun Sun, Yutian Du
Summary: In the warehousing procedure of fresh agricultural products in rural cold chain warehouses, the allocation decision of sorting resources is crucial and complicated, as it affects the loss reduction and cost savings. This paper proposes a Multi-Agent Reinforcement Learning System for Multi-type Sorting Resources Collaborative Allocation (MARLS-MSRCA) to improve the collaborative allocation of sorting resources. Through interactive learning and continuous interaction with the sorting environment, the MARLS-MSRCA achieves a significant reduction in order completion time and sorting cost in rural cold chain warehouses, promoting effective collaboration in the sorting procedure.
INTERNATIONAL JOURNAL OF INNOVATIVE COMPUTING INFORMATION AND CONTROL
(2023)
Article
Business
Fangfang Li, Lijun Sun, Nan Kong, Hang Zhang, Lipo Mo
Summary: Accurate sales forecasting is crucial for inventory replenishment systems in vehicle energy stations. Traditional methods often underestimate or overestimate sales due to their uncertainty and different patterns at different periods. We propose a novel method that combines fuzzy recognition of sales patterns with deep learning-based forecasting technique to achieve high prediction accuracy and reduce costs while preventing stockouts.
IEEE TRANSACTIONS ON ENGINEERING MANAGEMENT
(2023)
Article
Computer Science, Information Systems
Haishi Wang, Benqing Guo, Yao Wang, Runwu Fan, Lijun Sun
Summary: In this paper, a CMOS mixer-first analog receiver with power reduction is proposed, utilizing baseband noise cancellation. By applying positive capacitive feedback to manipulate poles/zeros location, a wide baseband bandwidth and out-of-band second-order filtering profile are achieved. Additional RF N-path filtering and baseband 40dB/dec roll-off are used to absorb out-of-band interferences. The fabricated receiver shows a minimal noise figure of 2.2 dB, an average voltage gain of 32.2 dB, and in-band/out-of-band third-order input intercept points of -12.8 dBm and 15.5 dBm respectively. The receiver circuit consumes approximately 32 mW at a typical 1 GHz local oscillator stimulus.
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)
