Article
Construction & Building Technology
Maryam Hojati, Ali M. Memari, Mehrzad Zahabi, Zhengyu Wu, Zhanzhao Li, Keunhyoung Park, Shadi Nazarian, Jose P. Duarte
Summary: This study proposes the use of barbed wires as a reinforcing component in 3D-printed concrete to improve its mechanical performance, especially moment capacity and bond strengths. The twisting of wires and the unique geometry of the 4-point barbs contribute to the enhancement of mechanical properties in 3D-printed concrete reinforcement.
AUTOMATION IN CONSTRUCTION
(2022)
Article
Construction & Building Technology
Maryam Hojati, Ali M. Memari, Mehrzad Zahabi, Zhengyu Wu, Zhanzhao Li, Keunhyoung Park, Shadi Nazarian, Jose P. Duarte
Summary: This study proposes a new reinforcement method for 3D-printed concrete, using barbed wires with sharp thorn-like projections, which successfully improves the mechanical performance. This method allows for in-process reinforcement during 3D printing and has the potential for further automation.
AUTOMATION IN CONSTRUCTION
(2022)
Article
Construction & Building Technology
Yiwei Weng, Mingyang Li, Teck Neng Wong, Ming Jen Tan
Summary: The proposed synchronized concrete and bonding agent deposition system addresses the weak interlayer bond strength issue in extrusion-based 3D concrete printing. By using cement paste as the bonding agent, a relative bond strength as high as 267% can be achieved through the system.
AUTOMATION IN CONSTRUCTION
(2021)
Review
Engineering, Civil
Sara Alonso-Canon, Elena Blanco-Fernandez, Daniel Castro-Fresno, Adrian Yoris-Nobile, Laura Castanon-Jano
Summary: This article reviews the current limitations of 3D printing of concrete structures, particularly the challenges in incorporating reinforcements. It focuses on the methods employed for reinforcement, specifically through the use of fibers. The study analyzes the properties, lengths, and percentages of fibers in mixtures, and compares the test results between printed and molded materials. The findings highlight the improvements in test results achieved by incorporating fibers.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
M. Parker, N. Ezeokeke, R. Matsuzaki, D. Arola
Summary: This study characterized the strength distribution of selected thermoplastic matrix composites as a function of printing via fused filament fabrication (FFF). The strength of the printed material was significantly reduced compared to the unprinted condition, regardless of reinforcement type, fiber volume fraction, or printer used. Damage introduced during filament extrusion and fiber failures induced during material deposition were the most detrimental factors.
MATERIALS & DESIGN
(2023)
Article
Construction & Building Technology
Tinghong Pan, Rongxin Guo, Chaoshu Fu, Xuping Ji, Zhuo Liu, Yong Yan
Summary: This study investigates the impact of flow direction on the distribution of material mass, deformation behavior, and interlayer bond strength in printed structures. The results show that increasing flow direction leads to higher deformation ratios, improved interlayer bond strength, and increased printing pressure. However, it also reduces the area ratio of deposited filament. Achieving a balance between buildability and interlayer bond properties solely by adjusting flow direction may be challenging.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Construction & Building Technology
Adil K. K. Al-Tamimi, Habib H. H. Alqamish, Ahlam Khaldoune, Haidar Alhaidary, Kamyar Shirvanimoghaddam
Summary: The technology of additive manufacturing, specifically 3D concrete printing, is being considered as an alternative to traditional construction methods in the construction industry. However, certain limitations still need to be addressed before the technology can be widely used. This paper explores the fundamentals of 3D printing, recommended materials and reinforcement methods, as well as the effect of different extrusion systems on the final product. It also discusses the application of additive construction systems with Building Information Modeling (BIM)-integrated algorithms.
Article
Chemistry, Physical
Izabela Hager, Marcin Maroszek, Katarzyna Mroz, Rafal Kesek, Marek Hebda, Leonid Dvorkin, Vitaliy Marchuk
Summary: This paper presents a research methodology for evaluating the interlayer bond strength of 3D-printed mineral materials. Three test methods, including direct tensile, splitting, and shear tests, were compared. The results indicate that the splitting test is the most effective method for assessing layer adhesion.
Article
Construction & Building Technology
A. Aramburu, I. Calderon-Uriszar-Aldaca, I. Puente
Summary: This study tests the bonding strength of passive rebars within a 3D-printed mortar structure by inserting the rebars into interior hollow channels and bonding them with filling mortar. Test results show that the bonding strengths range from 16.75 MPa to 18 MPa, depending on the rebar diameter, and the bonding mortar exhibits good early strength development of at least 14 MPa during the first week. No specimen failed due to debonding between the filling mortar and the 3D-printed cylinder, or between the cylinder and the concrete poured around its exterior.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Review
Construction & Building Technology
Senthil Kumar Kaliyavaradhan, P. S. Ambily, Prabhat Ranjan Prem, Swapnil Balasaheb Ghodke
Summary: This paper provides a comprehensive review of the test methods used to characterize the fresh and hardened properties of 3DPC and discusses the factors influencing test techniques and future research directions for standardizing the test methods. The extensive information provided in this review will assist the engineering community and 3DPC manufacturers in selecting suitable methods or standards to test 3DPC.
AUTOMATION IN CONSTRUCTION
(2022)
Article
Construction & Building Technology
J. Archez, N. Texier-Mandoki, X. Bourbon, J. F. Caron, S. Rossignol
Summary: This study investigates the use of geopolymer and 3D printing to create hollow cylinders, achieving success by adding small amounts of specific materials and adjusting printing speed.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Engineering, Manufacturing
Luong Pham, Guoxing Lu, Phuong Tran
Summary: This study investigates the influence of different architectural arrangements on the mechanical properties of hardened concrete. The experimental results show significant improvements in the flexural strengths of nontraditional specimens without steel fibers. The quasi-isotropic pattern demonstrates significant influences on both compressive and flexural responses.
3D PRINTING AND ADDITIVE MANUFACTURING
(2022)
Article
Construction & Building Technology
Goncalo Duarte, Nathan Brown, Ali Memari, Jose Pinto Duarte
Summary: This paper reviews and learns from historic buildings that rely on compression to resist gravity loads, in order to guide the construction of affordable housing and shelters using 3D printed concrete. By analyzing the form, structural principle, materials, and construction process of historic structures, the authors identify shapes suitable for 3D printing of concrete and propose strategies for addressing printability issues. The paper also provides insights into existing construction scale printing processes and material considerations to ensure successful printing of the identified forms.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Pathmanathan Rajeev, Akilesh Ramesh, Satheeskumar Navaratnam, Jay Sanjayan
Summary: Surgical face mask usage has increased due to the COVID-19 pandemic, leading to excessive plastic waste. This study explores the use of recycled face mask fibre in 3D concrete printing to improve printability and reduce landfill waste. The addition of face mask fibre improved rheological properties and strength, with significant increases in compressive and flexural strength.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Dentistry, Oral Surgery & Medicine
Yichen Xu, Alexander B. Xepapadeas, Bernd Koos, Juergen Geis-Gerstorfer, Ping Li, Sebastian Spintzyk
Summary: The study found that extending the post-rinsing time did not improve the cytocompatibility of SLA-printed orthodontic splint material, and may result in a decrease in flexural strength.
Article
Biotechnology & Applied Microbiology
Isam Al Zubaidi, Adil Al Tamimi, Mustafa Al-Zubaidi
Summary: The environmental impact of the de-oiling and reactivation process of spent clay from the oil industry was evaluated. The process includes multiple technical steps, with solvents used for de-oiling and acid treatment followed by thermal treatment for reactivation.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Civil
Haidar Alhaidary, Adil K. Al-Tamimi
Summary: This study found that ETA-approved anchors performed better under suboptimal site conditions, while non-approved anchors retained only a portion of their strength in common scenarios, posing safety risks.
Article
Environmental Sciences
Hamed Assaf, Sahar Idwan, Abdul Halim Jallad, Madiha Z. J. Ammari, Aktham Al Chaar, Mahmoud Kouja
Summary: This study assessed the public environmental values of mangrove wetlands in Ras Al Khaimah city, United Arab Emirates, taking into consideration factors such as gender, age, education, income, length of residency, knowledge of mangroves, and awareness of sustainability. The results showed that value orientations towards mangroves were strongly associated with length of residency and awareness of sustainability. Age, knowledge of mangroves, and education had weaker associations, while gender and income were largely independent. The majority of respondents supported the preservation of mangroves, even at the expense of economic development.
JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Kamyar Shirvanimoghaddam, Bozena Czech, Ram Yadav, Cemile Gokce, Laura Fusco, Lucia Gemma Delogu, Acelya Yilmazer, Graham Brodie, Amani Al-Othman, Adil K. Al-Tamimi, Jarret Grout, Minoo Naebe
Summary: Coronavirus disease (COVID-19) is a rapidly spreading pandemic that poses a severe threat to global public health. Human-to-human transmission of the virus is well established, primarily through aerosols and droplets. This review highlights the environmental challenges and risks associated with the surge in facemask production during the pandemic. It also discusses the potential of nanomaterial-based antiviral and self-cleaning facemasks as a sustainable solution.
Article
Green & Sustainable Science & Technology
Magdi El-Emam, Adil Al-Tamimi
Summary: This paper presents a study on the strength and deformation evaluation of earth blocks reinforced with different types of fiber. The results show that the addition of fiber significantly improves the compressive strength of the blocks, and the fiber content also affects the pre- and post-peak strength behavior of the blocks. Additionally, the addition of a small amount of cement improves the early stage stiffness of the blocks.
Review
Construction & Building Technology
Adil K. K. Al-Tamimi, Habib H. H. Alqamish, Ahlam Khaldoune, Haidar Alhaidary, Kamyar Shirvanimoghaddam
Summary: The technology of additive manufacturing, specifically 3D concrete printing, is being considered as an alternative to traditional construction methods in the construction industry. However, certain limitations still need to be addressed before the technology can be widely used. This paper explores the fundamentals of 3D printing, recommended materials and reinforcement methods, as well as the effect of different extrusion systems on the final product. It also discusses the application of additive construction systems with Building Information Modeling (BIM)-integrated algorithms.
Article
Green & Sustainable Science & Technology
Wisam J. Abushama, Adil K. Tamimi, Sami W. Tabsh, Magdi M. El-Emam, Ahmad Ibrahim, Taghreed Kh Mohammed Ali
Summary: This research investigates the potential of producing eco-friendly concrete using locally available materials in the UAE market. Supplementary cementitious materials, including GGBS and SF, are used to enhance particle size distribution and improve packing. The study demonstrates the improved properties of the concrete, and highlights the decreased carbon dioxide emissions and financial feasibility of eco-friendly concrete in the UAE.
Article
Construction & Building Technology
Haidar Alhaidary, Adil K. Al-Tamimi, Hashim Al-Wakil
Summary: Climate change has driven the development of energy conservation in buildings, with this research proposing a new method for creating an energy model of modern office buildings using a BIM-IRT-HFS framework. The study focuses on investigating passive heat-gain reduction measures through the building envelope, highlighting the significant impact of window replacement in conserving energy. The research also evaluates some BIM interoperability challenges in the context of the United Arab Emirates climate.
ADVANCES IN BUILDING ENERGY RESEARCH
(2021)
Article
Construction & Building Technology
Aktham Alchaar, Farid Abed
JOURNAL OF BUILDING ENGINEERING
(2020)
Article
Green & Sustainable Science & Technology
Ghina M. Zannerni, Kazi P. Fattah, Adil K. Al-Tamimi
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2020)
Article
Construction & Building Technology
Haitham Al Ajmani, Ferass Suleiman, Ismail Abuzayed, Adil Tamimi
Article
Biotechnology & Applied Microbiology
Isam Al Zubaidi, Adil Al Tamimi
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2018)
Article
Construction & Building Technology
Ahmed Al-Abdwais, Riadh Al-Mahaidi, Adil Al-Tamimi
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)
