Article
Engineering, Civil
Chae-Rim Im, Keun-Hyeok Yang, Sanghee Kim, Ju-Hyun Mun
Summary: The study found that the seismic performance of reinforced concrete columns is affected by the concrete unit weight - lightweight aggregate concrete columns have lower moment capacity and ductility compared to normal-weight concrete columns. This suggests that lightweight aggregate concrete columns require more transverse reinforcement to achieve similar seismic ductility under the same design conditions.
ENGINEERING STRUCTURES
(2022)
Article
Green & Sustainable Science & Technology
Zhuang Liu, Robert Worley, Fen Du, Courtney D. Giles, Mandar Dewoolkar, Dryver Huston, Ting Tan
Summary: This study investigated stress variations during flexure of early age basalt fiber reinforced concrete beams using high resolution temporal measurements. Different types of avalanches were detected, and good agreement was obtained between measured avalanche statistics or dynamics and predictions from the mean field model.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Zhuang Liu, Robert Worley, Fen Du, Dryver Huston, Mandar Dewoolkar, Ting Tan
Summary: This study investigated stress variations of polypropylene fiber reinforced concrete beams during flexure, using a new experimental system to collect stress-time curves and predicting statistics and dynamics of avalanches. Different types of avalanches were observed, providing insights into the essential failure mechanisms of concrete beams during flexure.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Mohammad Alshannag, Mansur Alshmalani, Abdulaziz Alsaif, Mahmoud Higazey
Summary: This paper presents the flexural response of lightweight high strength concrete beams reinforced with different combinations of steel fibers, crimped polypropylene fibers, and recycled plastic fibers. The results show that the fiber reinforced beams exhibit significantly increased load carrying capacity, flexural toughness, and ductility compared to beams without fibers. The beams reinforced with 0.5% of 60 mm long steel fibers and 0.25% of crimped polypropylene fibers showed the largest increase in load carrying capacity and flexural toughness. Furthermore, the use of recycled plastic fibers successfully enhanced the flexural performance of the beams without compromising their load carrying capacity.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Ahmed T. Omar, Assem A. A. Hassan
Summary: This study investigates the structural performance of large-scale lightweight self-consolidating concrete (LWSCC) and lightweight vibrated concrete (LWVC) beams made with expanded slate coarse aggregates (ESCAs) and expanded slate fine aggregates (ESFAs). The results show that using ESFA can improve the cracking moment capacity, deformability, ductility, and energy absorption capacity of the beams. The measured crack widths satisfy the durability requirements specified by design codes.
ACI MATERIALS JOURNAL
(2022)
Article
Engineering, Civil
Chuanjing Li, Hassan Aoude
Summary: Ultra-high performance concrete (UHPC) is an advanced material that has superior mechanical properties compared to conventional concrete. This paper investigates the use of UHPC to enhance the shear and flexural performance of high-strength concrete beams. Experimental results show that the application of a thin UHPC jacket significantly increases the shear capacity and enhances the flexural performance of the retrofitted beams.
Article
Green & Sustainable Science & Technology
Veerappan Sathish Kumar, Namasivayam Ganesan, Pookattu Vattarambath Indira, Gunasekaran Murali, Nikolai Ivanovich Vatin
Summary: Geopolymer concrete is considered as an excellent alternative to conventional cement concrete. This study investigates the flexural behavior of ternary blend geopolymer concrete with different proportions of hybrid fibers. The results show that the addition of hybrid fibers significantly improves the flexural properties of geopolymer concrete.
Article
Construction & Building Technology
Ramin Tolou Jouyandeh, Ali Hemmati, Alireza Mortezaei
Summary: The modern lifestyle and advancement in technology have resulted in a significant amount of plastic waste, making recycling of these waste materials a crucial challenge for human societies. This study explores the use of woven recycled plastic fibers as a replacement for steel reinforcements in reinforced concrete beams. Experimental results demonstrate that this method increases the ductility of the concrete beams.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Sang-Woo Kim, Hyo-Jun Chang
Summary: This study evaluated the structural performance of reinforced concrete interior beam-column joints with high-strength screw-type steel bars connected with couplers. The experiment showed that flexural cracks near the couplers slightly influenced initial stiffness and yielding point of longitudinal reinforcement, but did not significantly affect load-versus-drift relationship, peak load, and ductility capacity. The analytical results were similar to the experimental results.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Construction & Building Technology
Amgad Elbehiry, Omar Elnawawy, Magdy Kassem, Amr Zaher, Marwan Mostafa
Summary: This study investigates the use of banana fibers in concrete beams, finding that they significantly reduce cracking and increase flexural strength, leading to a more efficient reinforcement technique.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Ralph Jabbour, Joseph J. Assaad, Bilal Hamad
Summary: Polyvinyl alcohol (PVA) fibers are polymeric filaments that improve ductility and strain-hardening of cementitious composite mortars and grouts, showing a good compromise between cost and performance despite their higher unit price compared to polypropylene or steel fibers. The use of steel fibers resulted in a significant cost increase while achieving lower overall concrete performance than that achieved using PVA fibers.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Review
Construction & Building Technology
Mugahed Amran, Roman Fediuk, Hakim S. Abdelgader, G. Murali, Togay Ozbakkaloglu, Y. Huei Lee, Y. Yong Lee
Summary: Alkali-activated materials (AAMs) and steel fibers together have great potential in modern construction due to their superior bond strength and good interaction, leading to improved tensile strength and durability. Additional research is needed to further explore the application possibilities of fiber-reinforced alkali-activated concrete (FR-AAC) in different environmental conditions.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Mechanics
Farid Abed, Mohamad Kusay Sabbagh, Abdul Saboor Karzad
Summary: This study experimentally investigated the effect of adding basalt microfibers to BFRP reinforced short beams on shear response, revealing that the presence of microfibers can significantly enhance the stiffness, toughness, and ultimate shear strength of the beams.
COMPOSITE STRUCTURES
(2021)
Article
Construction & Building Technology
Muhammad Ahmad Farooq, Muhammad Fahad, Babar Ali, Shahid Ullah, Mohamed Hechmi El Ouni, Ahmed Babeker Elhag
Summary: This study assessed the influence of recycled nylon fiber (RNF) on the properties of medium-strength concrete. The findings showed that higher volume fractions of RNF reduced the compressive strength, while recommended doses of RNF improved splitting-tensile strength and flexural-tensile strength. RNF also helped in minimizing water absorption and chloride penetration depth of the concrete.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
M. Talha Junaid, Ahmed Shweiki, Samer Barakat, Mohamad Alhalabi, Omar Mostafa
Summary: Additive Manufacturing (AM) is a new technology that has attracted tremendous attention in many scientific fields in recent years. This research explores the application of AM in civil engineering, investigating the reinforcement of small-scale cement mortar prisms with 3D-printed thermoplastics. The results show that the introduction of lugs can increase the load-carrying capacity and ductility of the specimens, and thermoplastics can effectively reinforce mortar beams.
