Article
Construction & Building Technology
Omid Youse, Kambiz Narmashiri, Amir Ahmad Hedayat, Ali Karbakhsh
Summary: Corrosion significantly reduces the load bearing capacity and ductility of slender steel columns, leading to global buckling under compressive loading. Retrofitting corroded columns with CFRP increases their ultimate load capacity and ductility, delays buckling of the corroded area, controls fractures, and reduces stresses in the damaged zone.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Engineering, Civil
Yue Li, Jianglin Liu, Zigeng Wang, Caiyun Jin, Ji Hao, Hongwen Li
Summary: The study found that under different dechlorination current densities and periods, RC columns strengthened by MPC-CFRP could effectively enhance cumulative energy dissipation capacity, but increasing dechlorination current density and period significantly reduced the chloride ion content between rebar and concrete.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Nazar K. Oukaili, Hammad D. Merie
Summary: This paper investigates the influence of creating an opening near a column on the punching shear resistance of reinforced concrete bubbled slabs and the effectiveness of strengthening with CFRP sheets. The results show that openings decrease the load-carrying capacity of bubbled slabs, but CFRP strengthening can improve it.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Polymer Science
Bu Wang, Xianhui Wu, Qi Liu, Yueyue Wu, Fei Huang, Linfeng Xu, Xing Wu, Yuanxin Deng
Summary: In this study, the feasible carbon fiber reinforced polymer (CFRP) retrofit schemes for shear strengthening of three-dimensional reinforced concrete (RC) beam-column joints were investigated. Various parameters, such as CFRP reinforcement ratio, layout, and the number and location of transverse beams, were numerically analyzed. The introduction of a new dimensionless index, strengthening efficiency, helped evaluate the residual effect of the CFRP-strengthening system. The effectiveness of the CFRP strengthening technique and the significant differences among parameter's roles were confirmed.
Article
Construction & Building Technology
Khaled Samy, Mohamed Attia Fouda, Ahmed Fawzy, Tark Elsayed
Summary: This paper investigates the effectiveness of carbon fiber reinforced polymers (CFRP) wraps in strengthening reinforced concrete (R.C) columns. By increasing the contact area between the column's surface and CFRP, the efficiency of the strengthening technique is significantly improved. The experimental results show that the proposed method enhances the load capacity of columns by about 80%, surpassing the traditional CFRP jacket wrapping method by 60%.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
Davood Mostofinejad, Mohammad Sadegh Salimian, Maryam Taherirani, Masood Noroozolyaee
Summary: The study found that the grooving method effectively enhanced the performance and load-bearing capacity of the columns. For different eccentricity ratios, columns strengthened with the EBROG method showed a significant increase in load-carrying capacity.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2021)
Article
Mechanics
Yasir M. Saeed, Wisam A. Aules, Franz N. Rad
Summary: This study compares the effectiveness of externally bonded (EB) and near-surface-mounted (NSM) systems in flexural strengthening of reinforced concrete (RC) columns. The results show that both EB-CFRP and NSM-CFRP techniques can improve the flexural resistance of RC columns, with limited slippage of NSM-CFRP rods being an advantage.
COMPOSITE STRUCTURES
(2022)
Article
Construction & Building Technology
Ala' Taleb Obaidat, Ahmed M. Ashteyat, Yasmeen Taleb Obaidat, Aseel Yousef Al-Btoush, Shadi Hanandeh
Summary: The research found that the compressive capacity of reinforced concrete circular columns strengthened and repaired using a hybrid system of CFRP significantly increased when considering the effect of heat and repair technique. The strength of the specimens decreased as the temperature increased. The results from finite element modeling were in good agreement with experimental results, indicating the model's capability to predict compression behavior of the RC circular column.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Multidisciplinary Sciences
Tesfaye Alemu Mohammed, Solomon Abebe
Summary: This study investigated the performance of as-built and strengthened RC columns under blast loading using numerical simulations. The results showed that strengthened columns exhibited better blast resistance compared to as-built columns. The details of transverse reinforcement had a significant effect on the lateral displacement and failure modes of the columns.
Article
Chemistry, Physical
Zheng-Nan Jing, Rong-Gui Liu, Gui-Hua Xie, Dan Liu
Summary: Experimental tests show that the performance features of deep T-beams do not meet the assumption of plane cross-section, and the 'strut-and-tie' model is applicable in such structures. Optimizing reinforcement systems can significantly improve the shear capacity of deep T-beams.
Article
Engineering, Civil
Yasir M. Saeed, Wisam A. Aules, Franz N. Rad
Summary: This study investigated a rapid FRP confinement technique for repairing previously strengthened columns. The proposed technique was found to effectively restore the original strength and significantly improve the strength of the repaired columns, with a repair time of only three days. This technique shows promise as a permanent repair technique.
Article
Construction & Building Technology
Dia Alwash, Robin Kalfat, Riadh Al-Mahaidi, Hongjian Du
Summary: This study tested fourteen RC beams strengthened in shear using NSM CFRP textile bonded with CBA, showing a significant improvement in shear capacity. The use of CBA in NSM CFRP strengthening techniques demonstrated comparable results to epoxy resins, making it a good substitute for bonding CFRP to concrete members.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
Jia-Qi Yang, Peng Feng, Bin Liu, Husheng Wang, Weiping Zhao, Lili Hu
Summary: This paper proposes a novel method for strengthening reinforced concrete (RC) beams using prestressed carbon fibre-reinforced polymer (CFRP) plates. The method is fast and easy to apply without the need for hydraulic jacks or adhesives. Test results showed that the proposed method effectively enhanced the beam strength and improved its ductility.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Ye Hu, Li Chen, Qin Fang, Xiangzhen Kong, Yanchao Shi, Jian Cui
Summary: This study proposed three different retrofitting methods using CFRP sheets to improve the anti-blast performance of current RC structures. Field tests showed that the methods enhanced the lateral resistance and local damage of RC columns to different extents. The study also identified brittle failure at column ends as a vulnerable point for axial bearing capacity, where CFRP wrapping was inconvenient. Finally, a new formula based on residual bearing capacity was proposed to quantitatively calculate the retrofitting contribution to blast resistance of RC columns.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Yaroslav Blikharskyy, Jacek Selejdak, Rostyslav Vashkevych, Nadiia Kopiika, Zinoviy Blikharskyy
Summary: This paper presents the results of a study on the behavior of columns strengthened with CFRP laminates under eccentrically applied axial loading. The study found that pre-loading during the strengthening process can affect the behavior of the columns. Large-scale column specimens were tested and the effect of different levels of pre-loading on the behavior was investigated. It was found that higher levels of initial loading decreased the strengthening effect and reduced the ultimate displacement at ultimate load. The stiffness increased and deflections decreased due to CFRP strengthening. The presence of initial loading slightly decreased the ductility of CFRP strengthened columns. The findings highlight the specific features of CFRP effectiveness that should be considered in engineering practice.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Irem Sanal, Nilufer Ozyurt Zihnioglu, Ardalan Hosseini
CONSTRUCTION AND BUILDING MATERIALS
(2015)
Article
Engineering, Civil
Davood Mostofinejad, Amirhomayoon Tabatabaei Kashani, Ardalan Hosseini
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2016)
Article
Engineering, Chemical
Ardalan Hosseini, Davood Mostofinejad, Mehran Emami
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2015)
Article
Engineering, Multidisciplinary
Irem Sanal, Nilufer Ozyurt, Ardalan Hosseini
COMPOSITES PART B-ENGINEERING
(2016)
Article
Engineering, Civil
Majid Ghorbani, Davood Mostofinejad, Ardalan Hosseini
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2017)
Article
Polymer Science
Ardalan Hosseini, Elyas Ghafoori, Masoud Motavalli, Alain Nussbaumer, Xiao-Ling Zhao, Roland Koller
Article
Engineering, Chemical
Ardalan Hosseini, Davood Mostofinejad
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2014)
Article
Engineering, Mechanical
Ardalan Hosseini, Davood Mostofinejad, Masoud Hajialilue-Bonab
JOURNAL OF ENGINEERING MECHANICS
(2014)
Article
Construction & Building Technology
Ardalan Hosseini, Elyas Ghafoori, Riadh Al-Mahaidi, Xiao-Ling Zhao, Masoud Motavalli
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Construction & Building Technology
Ardalan Hosseini, Julien Michels, Mohammadreza Izadi, Elyas Ghafoori
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Engineering, Mechanical
Ardalan Hosseini, Alain Nussbaumer, Masoud Motavalli, Xiao-Ling Zhao, Elyas Ghafoori
INTERNATIONAL JOURNAL OF FATIGUE
(2019)
Article
Engineering, Multidisciplinary
Niloufar Moshiri, Christoph Czaderski, Davood Mostofinejad, Ardalan Hosseini, Khaled Sanginabadi, Matteo Breveglieri, Masoud Motavalli
COMPOSITES PART B-ENGINEERING
(2020)
Article
Mechanics
Ardalan Hosseini, Elyas Ghafoori, Masoud Motavalli, Alain Nussbaumer, Xiao-Ling Zhao
COMPOSITE STRUCTURES
(2017)
Article
Construction & Building Technology
Majid Ghorbani, Davood Mostofinejad, Ardalan Hosseini
CONSTRUCTION AND BUILDING MATERIALS
(2017)
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)