Article
Green & Sustainable Science & Technology
Kwabena Boakye, Morteza Khorami
Summary: This study investigates the effectiveness of calcined clay as a precursor for geopolymer mortar and finds that adding 20% calcined clay to the mixture can improve the performance of the geopolymer mortar. The study also highlights the mutual reliance between the two precursors for producing desirable geopolymer mortar.
Article
Construction & Building Technology
Fatmanur Ates, Kyu Tae Park, Kyeong Woo Kim, Byeong-Hun Woo, Hong Gi Kim
Summary: The use of biomass for energy production is common, but the ash produced in the process is a problem. Previous studies have explored using residual biomass ashes in cement-treated materials, but their low properties negatively impact strength. This study investigates treating biomass waste materials for use in concrete made with geopolymer composite as a binder. The results show considerable improvements in the physical and mechanical characteristics of treated mortars.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Olajumoke L. Oladele, Elijah D. Adesanya, Arantxa Arbe, Amaia Iturrospe, Mary B. Ogundiran
Summary: The aim of this study was to produce geopolymers with improved durability and sustainability using local kaolin clay as precursor, cocoapods-ash (CPA) as alternative alkali hydroxide activator, periwinkle-shells-ash (PSA) as hardener and quarrydust (QD) as filler. The geopolymers were characterized for physical, mechanical and durability properties, and the results showed that the addition of PSA reduced the setting time and improved compressive strength. The CPA-containing geopolymers also exhibited reduced efflorescence tendencies compared to the reference geopolymer.
APPLIED CLAY SCIENCE
(2023)
Article
Construction & Building Technology
Sakchai Naenudon, Anousit Vilaivong, Yuwadee Zaetang, Weerachart Tangchirapat, Ampol Wongsa, Vanchai Sata, Prinya Chindaprasirt
Summary: This study investigated the use of waste fiber cement in making high flexural strength lightweight fly ash geopolymer mortar. The results showed that the workability, density, and strength of mortars decreased with an increase in waste fiber cement content. Incorporating 30-40% waste fiber cement resulted in high flexural strength mortar with thermal and sound insulating properties.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Temple Chimuanya Odimegwu, A. B. M. A. Kaish, Maslina Jamil, M. F. M. Zain, Asset Turlanbekov, Ahmed W. Al Zand
Summary: This study evaluates the use of alum sludge as a substitute for fly ash in producing geopolymer paste and mortar. The blending of these industrial wastes can contribute to sustainable construction and disposal of industrial waste, as well as reduce CO2 emissions from the cement production industry. Laboratory investigations show that geopolymer paste and mortar with alum sludge replacement have good flowability and workability, especially at higher replacement contents. The addition of alum sludge improves properties such as density, strength, water absorption, and high-temperature behavior, with the optimal replacement level at 50%.
Article
Materials Science, Ceramics
D. Kioupis, A. Zisimopoulou, S. Tsivilis, G. Kakali
Summary: The study found that the foaming agent content is the determining factor of geopolymer properties, while alkali concentration plays a crucial role in pore morphology and strength development. Foaming with Aluminum is more effective than Zinc powder due to the release of more gases. Additionally, the incorporation of potassium ions contributes to the development of porous structures.
CERAMICS INTERNATIONAL
(2021)
Article
Construction & Building Technology
M. O. M. Mashri, Megat Azmi Megat Johari, Zainal Arifin Ahmad, M. J. A. Mijarsh
Summary: The aim of this study was to utilize a large amount of ultrafine palm oil fuel ash (UPOFA) to produce geopolymer mortar, with the incorporation of additives and the use of a statistical design program. The study examined four factors and three levels for each in order to obtain an optimal mixture. The results showed that a mixture consisting of 77 wt% UPOFA, 11.5 wt% ESA, and 11.5 wt% SF achieved a high compressive strength of 125.4 MPa after 28 days of curing.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Prinya Chindaprasirt, Jakkapong Lao-un, Yuwadee Zaetang, Athika Wongkvanklom, Tanakorn Phoo-ngernkham, Ampol Wongsa, Vanchai Sata
Summary: This research investigates the use of auto glass waste as fine aggregates in high-calcium fly ash geopolymer mortar. The results show that the inclusion of auto glass waste has a slight effect on workability and strength, but significantly improves thermal insulation and fire resistance. Despite a decrease in compressive strength, using 100% auto glass waste still provides acceptable strength and very low thermal conductivity. This research provides a reference for the development of green building materials with excellent thermal insulation and fire-resistant properties.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Materials Science, Ceramics
Serhat Celikten, Gulay Erdogan
Summary: This paper investigated the mechanical and microstructural properties of geopolymer mortars made from RP and FA blends before and after exposure to elevated temperatures. The results showed that the mortars with a RP/FA mass ratio of 25/75 exhibited better performance after high temperature exposure, with higher flexural and compressive strength values at 800 degrees C compared to 600 degrees C.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
Miljana Mirkovic, Ljiljana Kljajevic, Sabina Dolenec, Milos Nenadovic, Vladimir Pavlovic, Milica Rajacic, Snezana Nenadovic
Summary: This study investigates the potential use of fly ash from the Nikola Tesla thermal power plant in Serbia to develop hybrid geopolymeric materials. The addition of 1 wt% PVA in the geopolymeric matrix results in the best mechanical properties, and all geopolymer samples showed a 50% decrease in radiological activity concentrations compared to fly ash. The research focuses on structural, morphological, mechanical, and radiological properties of the hybrid materials during 28 days of aging at room temperature.
Article
Chemistry, Physical
Ikmal Hakem A. Aziz, Mohd Mustafa Al Bakri Abdullah, Rafiza Abd Razak, Zarina Yahya, Mohd Arif Anuar Mohd Salleh, Jitrin Chaiprapa, Catleya Rojviriya, Petrica Vizureanu, Andrei Victor Sandu, Muhammad FaheemMohd Tahir, Alida Abdullah, Liyana Jamaludin
Summary: This study compares the mechanical performance and microstructure of fly ash geopolymer after 28 days and 10 years of curing, showing that the 10-year aged geopolymer exhibits improved strength development and denser microstructure. The formation of anorthite leads to reduced total porosity and a decrease in pore distribution in the range of 5-30 μm.
Article
Green & Sustainable Science & Technology
Mohamed Rabie, Mohammad R. Irshidat, Nasser Al-Nuaimi
Summary: The feasibility and environmental impact of producing sustainable cement-free composites were investigated in this research. The study examined the behavior of geopolymer composites under different synthesis parameters and curing conditions. The results demonstrated the potential of geopolymer composites with positive environmental impacts over traditional cementitious composites. Heat curing was necessary for achieving high early strength in geopolymer mortar, but ambient curing showed better strength development with age. The optimum fluid to binder ratio was 0.6, and higher molarity and greater amount of reacted FA particles resulted in a better microstructure and fewer pores in the geopolymer mortar.
Article
Environmental Sciences
K. Arunkumar, M. Muthukannan, A. Suresh Kumar, A. Chithambar Ganesh
Summary: The world-class trend is focused on finding an alternative for cement to reduce environmental pollution. Geopolymer is considered as an ideal option for utilizing industrial waste, although it requires high alkaline solution and high temperature curing. The addition of waste rubber fiber improved the mechanical properties of low calcium geopolymer mix significantly, but exceeding 1% may decrease the strength parameters.
ENVIRONMENTAL RESEARCH
(2021)
Article
Construction & Building Technology
Laura Silvestro, Taylana Piccinini Scolaro, Artur Spat Ruviaro, Geannina Terezinha dos Santos Lima, Philippe Jean Paul Gleize, Fernando Pelisser
Summary: Biomass is a sustainable energy source, and its ash can be used to produce geopolymers as an alternative to Portland cement. This study investigated the production of geopolymer systems with metakaolin (MK) replaced by different biomass wood ashes (WA-A, WA-B, and WA-C). The specific surface area of the ashes played a crucial role in the rheological parameters and hydration kinetics of the geopolymers. Geopolymers with WA-A and WA-C showed comparable compressive strength to the control samples for MK to WA replacement percentages of up to 20% and 10%, respectively. The WA-based geopolymers also exhibited lower CO2 emissions compared to MK.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Polymer Science
Rajab Abousnina, Haifa Ibrahim Alsalmi, Allan Manalo, Rochstad Lim Allister, Omar Alajarmeh, Wahid Ferdous, Khouloud Jlassi
Summary: This study demonstrates that adding short fibers can improve the mechanical properties of geopolymer mortar containing light crude oil, especially when using straight PP fibers and a fiber dosage of 0.5%. This new material can be used for building and construction applications.
Article
Construction & Building Technology
Mohammed A. Khalaf, Chee Ban Cheah, Mahyuddin Ramli, Naser M. Ahmed, Ahmed Mohammed Abid Al-Asady, Amal Mohamed Ahmed Ali, Abdullah Al-Shwaiter, Weerachart Tangchirapat
Summary: The study focuses on using nanomaterials such as nano-silica slurry and nano-calcium carbonate as additives to improve the properties of steel furnace-slag heavyweight concrete, including durability, mechanical strength, and gamma-ray attenuation properties. The combined use of nanosilica slurry and nano-calcium carbonate was found to enhance the mechanical strength, fluid transport, and gamma-ray shielding properties of the concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Mohammed A. Khalaf, Chee Ban Cheah, Mahyuddin Ramli, Naser M. Ahmed, Abdullah Al-Shwaiter
Summary: The addition of 1.5% nano zinc oxide and 3% nano-silica enhances gamma-ray shielding and compressive strength of concrete by 16.3% and 6.6% respectively compared to the control mix at 28 days. Furthermore, all mechanical and fluid transport properties of the concrete were improved. The combined use of nano-silica and nano zinc oxide is suitable to enhance mechanical strength, fluid transport, and high energy radiation attenuation performance of steel furnace-slag heavyweight concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Construction & Building Technology
Chee Ban Cheah, Leng Ee Tan, Mahyuddin Ramli
Summary: This paper provides a comprehensive review on the effects of different types of alkali activators on GGBFS-based concrete. Commercial alkali activators include hydroxide-based, silicate-based, carbonate-based, and oxide-based activators. By-product activators can be directly obtained or derived from industrial by-products. By-product derived sodium silicate has shown similar mechanical properties to commercial sodium silicate, making it an effective alternative activator. Lime kiln dust exhibits similar properties to oxide and carbonate-based alkali activators.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Environmental
Narendra Kumar, Sudhir S. Amritphale, John C. Matthews, Joan G. Lynam, Shaurav Alam, A. Abdulkareem Omar
Summary: The study aims to combine wastes from the steel industry, the galvanizing industry, and the pulp and paper industry to create two new useful products, reducing the need for virgin materials. By using spent sulfuric acid to precipitate lignin from black liquor and combining it with steel industry wastes, sustainable reducing materials for steelmaking furnaces were successfully produced. The investigated wastes have the potential to increase recycling in the steel industry and improve geopolymeric products.
Article
Construction & Building Technology
Hongfang Lu, Tom Iseley, John Matthews, Wei Liao
Summary: This study introduces a hybrid machine learning model that combines NSGA-II and SVM to predict the pullback force in HDD construction accurately, with validation in practical projects.
AUTOMATION IN CONSTRUCTION
(2021)
Article
Energy & Fuels
Hongfang Lu, Tom Iseley, John Matthews, Wei Liao, Mohammadamin Azimi
Summary: The study proposed an ensemble data-driven model to predict burst pressure of pipelines with high accuracy and stability. In the model design, relevance vector machine was utilized as the basic predictor and optimized with multi-objective salp swarm algorithm to improve prediction accuracy.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Civil
Shaurav Alam, Tanvir Manzur, John Matthews, Chris Bartlett, Erez N. Allouche
Summary: This study conducted an experimental research on deteriorated and retrofitted corrugated metal pipes (CMPs), and found that rehabilitation can restore the structural health of CMPs, providing significant implications for design guidelines.
KSCE JOURNAL OF CIVIL ENGINEERING
(2021)
Article
Soil Science
Shaurav Alam, Tanvir Manzur, Eric Borquist, Joseph Williams, Cody Rogers, David Hall, William B. Patterson, Joseph Higuera, Erik Eklund, Jay Wang, John Matthews
Summary: Research suggests that seawalls can control coastal soil erosion, but they can also cause water clarity deterioration and algae growth. Using controlled cultivation of plants as an environmentally friendly solution may be more effective, as plant root tensile strength directly impacts soil shear strength. The In-situ Smart Testing Apparatus (ISTA) developed in this study has the potential to measure, store, and distribute real-time data to aid professionals in preventing soil erosion and ensuring sustainable coastal ecosystems.
SOIL & TILLAGE RESEARCH
(2021)
Review
Engineering, Civil
Jason M. Howell, Elizabeth Matthews, John Matthews, Shaurav Alam, Anthony Bednar, Charles Laber, Sven Eklund
Summary: This research compares styrene emissions produced during steam-cured, styrene-based cured-in-place pipe (CIPP) installation with data from other relevant studies, analyzing differences and similarities in conclusions and measurements, and identifying common findings and trends.
JOURNAL OF PIPELINE SYSTEMS ENGINEERING AND PRACTICE
(2022)
Article
Construction & Building Technology
Cheah Chee Ban, Tan Leng Ee, Mahyuddin Ramli, Hazizan Bin Md Akil, Kim Hung Mo
Summary: This study aimed to develop a low embodied carbon alkali activator for sustainable production of alkali-activated binder (AAB). Lime kiln dust (LKD) was used as an alternative alkali activator, which improved the mechanical and durability performance of alkali-activated mortar (AAM). The optimum ratio of FA to GGBS was 3:2.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Civil
He Jin, Kalyan R. R. Piratla, John C. C. Matthews, Jonghoon Kim
Summary: This study presents the Culvert Renewal Selection Tool (CREST), which provides guidance for transportation agencies in selecting the optimal culvert renewal technique based on various criteria. The CREST tool consists of 12 renewal techniques and utilizes the principles of the analytical hierarchy process for decision-making. The results of this study, obtained through Monte Carlo simulation procedures, offer valuable guidance for transportation agencies in choosing culvert renewal techniques.
JOURNAL OF PIPELINE SYSTEMS ENGINEERING AND PRACTICE
(2023)
Article
Engineering, Civil
Sai Nethra Betgeri, John C. C. Matthews, Greta Vladeanu
Summary: The Pipeline Assessment and Certification Program (PACP) is the industry-accepted protocol for condition rating sewer pipes in the US. It relies on visual inspections using closed-circuit television (CCTV) but does not consider various pipe characteristics and maintenance history. To address this limitation, a new wastewater pipe rating system called the comprehensive rating (CR) system was developed, which incorporates pipe characteristics, external characteristics, and hydraulic characteristics. However, the validity percentage of the CR model was below average due to the assumption of linear regression. Improvements can be made by involving more experts, enhancing geospatial data accuracy, and establishing evaluation standards for inspectors. Further research is needed to determine a suitable nonlinear relationship for modeling data from the CR system.
JOURNAL OF PIPELINE SYSTEMS ENGINEERING AND PRACTICE
(2023)
Article
Engineering, Civil
Hongfang Lu, Zhao-Dong Xu, Xulei Zang, Dongmin Xi, Tom Iseley, John C. Matthews, Niannian Wang
Summary: Pipeline condition assessment is a cost-effective method for determining the status of pipeline structure and predicting failure probability. Recent advances in machine learning techniques have enabled more effective assessment. This paper provides a comprehensive review of machine learning applications in pipeline condition assessment, covering fault diagnosis, risk prediction, parameter prediction, and visual defect recognition. The review highlights the need for more hybrid models, as well as the potential of transfer learning and reinforcement learning for future research.
JOURNAL OF PIPELINE SYSTEMS ENGINEERING AND PRACTICE
(2023)
Article
Water Resources
M. Amin Azimi, John C. Matthews, Asal Bagherpour, Alhossin Alsadi, John J. Kraft, Shaurav Alam, Urso Campos
Summary: Many utility owners in the United States are actively searching for new and innovative rehabilitation techniques for their aging pipeline systems, with SIPP lining being a promising solution to this issue. This study investigated the mechanical properties of a reinforced SIPP lining material, demonstrating that using carbon fiber reinforcement significantly improves the material's mechanical performance.
FRONTIERS IN WATER
(2021)
Article
Multidisciplinary Sciences
Omar A. Abdulkareem, John C. Matthews
Summary: The study found that basalt fibers and carbon fibers have a significant reinforcing effect on the mechanical strengths of a hybrid binary waste ash geopolymer matrix, resulting in improved strength characteristics and toughness of the composites.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Keyu Zhu, Xitao Zheng, Jing Peng, Jiaming Sun, Ruilin Huang, Leilei Yan
Summary: This paper discusses the influence of multiple impacts on the compression strength of honeycomb sandwich structures with composite face sheets. It is found that the size of the impactor affects the turning point of the compression strength. Additionally, high impact energy leads to damage in the bottom face sheet and reduces the overall compression strength.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Danqian Wang, Yanfei Yue, Jueshi Qian
Summary: Magnesium Potassium Phosphate Cement (MKPC) as a binder for steel rebars shows improved corrosion resistance when subjected to carbonation, due to the increase in pH and the formation of a more protective oxide film.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Zhibin Li, Wenyu Wang, Pengcheng Xue, Xingyu Wei, Jian Xiong
Summary: This work proposes a design approach and manufacturing method for carbon fiber reinforced plastic (CFRP) corrugated sandwich truncated cones (CSTC) to improve their anti-debonding ability and ensure reliability. The study establishes theoretical models for CSTCs' stiffness and failure modes, which are verified through experiments and finite element analysis (FEA). The research reveals the effect of geometric parameters on failure modes and performs an optimal design for CSTC structures. The findings have significant implications for the design and application of lightweight CSTCs in constructions, such as launch vehicle adapters.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mingyu Zhang, Lei Chu, Jiahua Chen, Fuxun Qi, Xiaoyan Li, Xinliang Chen, Deng-Guang Yu
Summary: This review summarizes the different structures and construction methods of fibrous membranes with asymmetric wettability. It also reviews the biological applications of these membranes and suggests future challenges.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
E. Mofakhami, L. Gervat, B. Fayolle, G. Miquelard-Garnier, C. Ovalle, L. Laiarinandrasana
Summary: This study investigates the effects of fibre concentration on the mechanical response of welded glass-fibre-reinforced polypropylene (GF-PP). Experimental observations reveal a significant reduction in weld ratio, up to 60%, indicating a decreased strength compared to the bulk material. Increasing fibre content in the welded material results in a decrease in stress at break and strain at the maximum stress. The use of DIC technique and X-ray microtomography further confirms the localized strain amplification in the welded zone due to the significant increase in fibre density.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Emad Pourahmadi, Farjad Shadmehri, Rajamohan Ganesan
Summary: This research compares the mechanical properties of laminates manufactured using automated fiber placement and conventional autoclave curing methods. The results show that laminates manufactured using automated fiber placement have a lower interlaminar shear strength compared to laminates reconsolidated using autoclave curing. A finite element simulation method is proposed to quantitatively analyze these differences.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Johnny Jakobsen, Benny Endelt, Fahimeh Shakibapour
Summary: This study proposes a new bolted/pinned joining method for composite applications, which improves load transfer by introducing a patch-type reinforcement. Experimental results demonstrate significant improvements in both static and fatigue load conditions compared to existing methods. Finite element simulations highlight the advantage of this method, as it creates a more efficient load-transferring mechanism through different stress distributions.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Gisele G. Cintra, Janine D. Vieira, Daniel C. T. Cardoso, Thomas Keller
Summary: This paper proposes a novel approach to assess multi-crack behavior in layered fiber-polymer composites. The generated Compliance and R-curves provide useful insights into understanding the multiple delamination process and allow for separate evaluation of strain energy release rate (SERR) for each crack. The developed cohesive zone model successfully simulates the failure process zone of three parallel cracks, showing good agreement between the numerical model and experimental results.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Renil Thomas Kidangan, Sreedhar Unnikrishnakurup, C. Krishnamurthy, Krishnan Balasubramaniam
Summary: The induction heating process can accurately identify fiber orientation and stacking order, making it a valuable tool for large-area inspection and quality control in manufacturing fiber-reinforced composites.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Sungjun Hwang, Yousoo Han, Douglas J. Gardner
Summary: Bleached Kraft pulp, unbleached Kraft pulp, and old corrugated cardboard pulp are suitable for producing cellulose nanofibril suspensions. Spray drying is a fast, simple, cost-effective, and scalable drying method. Spray-dried cellulose nanofibrils can be used as reinforcing materials in polypropylene matrices. The particle size of cellulose nanofibrils affects the material properties.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mehdi Mahdavi, Abbas Zolfaghari
Summary: This study aims to improve the recovery forces of shape memory polymers (SMPs) through material extrusion additive manufacturing. By using glass fiber (GF) as reinforcement and manufacturing multi-layer composite specimens, it was found that PLA with 6.62% GF exhibited the best recovery force, which was further optimized through annealing heat treatment.
COMPOSITES PART B-ENGINEERING
(2024)
Review
Engineering, Multidisciplinary
Xiang Ao, Antonio Vazquez-Lopez, Davide Mocerino, Carlos Gonzalez, De-Yi Wang
Summary: The vulnerability of natural fibers to heat and fire poses a significant challenge for their substitution of traditional fiber reinforcements in composite materials. Natural fiber/polymer composites (NFCs) are regarded as potential candidates for engineering applications due to their environmental friendliness and low-impact sourcing. Thus, appropriate approaches need to be implemented to enhance the fire safety of NFCs. This review summarizes and discusses the latest understanding of flammability and thermal properties of natural fibers, with a special focus on their interaction with polymer matrix in fire behavior. Additionally, the latest developments in flame-retardant approaches for NFCs are reviewed, covering both flame retardancy and fire structural integrity. Finally, future prospects and perspectives on fire safety of NFCs are proposed, providing insights into further advancements of NFCs.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Cheng Wang, Siqi Huo, Guofeng Ye, Bingtao Wang, Zhenghong Guo, Qi Zhang, Pingan Song, Hao Wang, Zhitian Liu
Summary: The demand for multifunctional, transparent epoxy resin with superior dielectric, mechanical, and fire-safety performances is increasing in modern industries. Researchers have developed an epoxidized, phosphaphenanthrene-containing poly(styrene butadiene styrene) (ESD) for advanced fire-safe epoxy resin, which maintains high transparency and improves UV-blocking property. The addition of 10 wt% ESD results in improved mechanical properties, decreased dielectric constant and loss, and outperformance compared to other fire-safe epoxy resins. This research provides an effective method for developing multifunctional flame-retardant epoxy resin.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Bo Pang, Heping Zheng, Zuquan Jin, Dongshuai Hou, Yunsheng Zhang, Xiaoyun Song, Yanan Sun, Zhiyong Liu, Wei She, Lin Yang, Mengyuan Li
Summary: This study develops an internal superhydrophobic material (ISM) using waste denitrification fly ash, which maintains stable hydrophobicity under harsh conditions of use and does not rely on expensive fluor-based surface modifications. The synthesized ISM has excellent matrix strength, strong waterproof properties, and retains superhydrophobicity even at damaged or friction interfaces.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Meirbek Mussatayev, Qiuji Yi, Mark Fitzgerald, Vincent K. Maes, Paul Wilcox, Robert Hughes
Summary: Real-time monitoring of carbon fibre composites during Automated Fibre Placement (AFP) manufacturing remains a challenge for non-destructive evaluation (NDE) techniques. This study designed a directional eddy-current (EC) probe to evaluate the detectability of out-of-plane wrinkles. Experimental evaluations and finite element modeling were conducted to better understand the relationship between eddy-current density and defect detection. The findings suggest that the probe configuration with an asymmetric driver coil and differential pickup coils shows the best capability for wrinkle detection.
COMPOSITES PART B-ENGINEERING
(2024)
