Article
Construction & Building Technology
Anoop Kallamalayil Nassar, Parthiban Kathirvel
Summary: This research proposes a novel method to develop an activator for one-part geopolymer binders in order to overcome the sustainability issues related to conventional sodium silicate. The developed activator, produced using a thermo-mechano-chemical technique, enhances the mechanical strength of geopolymers and offers similar workability to Portland cement.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Faping Li, Defeng Chen, Zheming Yang, Yiyan Lu, Haojun Zhang, Shan Li
Summary: This study analyzed the resistance of mixed fiber reinforced fly ash-based geopolymer against carbonation using the accelerated carbonation test. The results showed that the incorporation of modified multi-walled carbon nanotubes (MWCNTs) and polyvinyl alcohol (PVA) fibers can enhance the resistance of the geopolymer. Additionally, the addition of these materials can also improve the compressive strength of the geopolymer.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Peem Nuaklong, Kit Janprasit, Pitcha Jongvivatsakul
Summary: Incorporating rice husk ash led to an improvement in compressive strength of high-calcium fly ash geopolymer modified with borax, while using borax instead of sodium silicate resulted in decreased strength. The decrease in strength when using borax was attributed to the increase in crystalline nature of reaction products caused by lower Si/Al ratios in the gel phases formed.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Chemistry, Physical
Hatice oznur Oz, Neslihan Dogan-Saglamtimur, Ahmet Bilgil, Aykut Tamer, Kadir Gunaydin
Summary: This study investigated the effects of design parameters on class F fly ash-based geopolymer composites, including L/S ratio, Na2SiO3/NaOH weight ratio, and curing temperature. The results showed that the geopolymer with an L/S ratio of 0.2 and Na2SiO3/NaOH ratio of 2 exhibited the highest compressive strength. Furthermore, the optimal thermal curing temperature for achieving the best strength characteristics was found to be 100 degrees C.
Article
Environmental Sciences
Lizia Thankam Gnanadurai, Neelakantan Thruvas Renganathan, Christopher Gnanaraj Selvaraj
Summary: This study aims to synthesize fine aggregates from industrial byproducts through geopolymerization to replace natural sand, reducing the use of river sand, minimizing land pollution, and enhancing the practicality of fine aggregates.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Ceramics
Faping Li, Yiyan Lu, Zhenzhen Liu, Li Shan
Summary: The carbonation resistance of high ductility fly ash-based geopolymer was studied through accelerated carbonation experiment. The addition of modified MWCNTs and PVA fibers improved the carbonation resistance of the geopolymer at both micron and nanoscale. Under natural carbonation conditions, a reverse-diffusion phenomenon was observed, and the pH value of the carbonized zone increased from 8.1 to 11.5, indicating a significant improvement in carbonation resistance.
CERAMICS INTERNATIONAL
(2023)
Review
Polymer Science
Fatheali A. Shilar, Sharanabasava V. Ganachari, Veerabhadragouda B. Patil, T. M. Yunus Khan, Naif Mana Almakayeel, Saleh Alghamdi
Summary: This paper investigates the impact of important nanomaterials on the performance of geopolymer concrete. The study reveals that increasing the alkaline to binder and sodium silicate to sodium hydroxide ratios can enhance the strength development of geopolymer concrete. The addition of small quantities of nanomaterials further improves the strength and structural stability of the concrete, enhancing its durability.
Article
Materials Science, Multidisciplinary
Faping Li, Zheming Yang, Haifeng Lu, Shan Li
Summary: Geopolymer, as a green cementing material, addresses issues of environmental pollution and waste of building resources. The study evaluated the working performance and selected a basic mix proportion of geopolymer. The addition of functionalized multi-walled carbon nanotubes (MWCNTs) improved the impermeability and mechanical strength of the geopolymer composite (EGC) by refining the pore structure and enhancing compactness of the internal structure.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Peng Zhang, Kexun Wang, Juan Wang, Jinjun Guo, Yifeng Ling
Summary: Through macroscopic and microscopic analyses, this study illustrated the mechanisms of the interaction between nanosilica and polyvinyl alcohol fibers on the mechanical performance of metakaolin/fly ash based geopolymer mortar. It was found that an appropriate amount of nanosilica promoted geopolymerization and improved mechanical properties, while excessive nanosilica negatively impacted the hydration reactions of the materials, leading to reduced strength of the geopolymer mortar.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Shaik Numan Mahdi, Dushyanth V. R. Babu, Nabil Hossiney, Mohd Mustafa Al Bakri Abdullah
Summary: The utilization of rice husk ash in development of geopolymer binders in India can help alleviate environmental problems. This study focuses on developing GEOPAV blocks using brick kiln rice husk ash (BKRHA), which showed improvements in split tensile strength and flexural strength, as well as enhanced resistance to acid and frost attack compared to commercially available paver blocks. The addition of BKRHA contributes towards forming a dense geopolymer matrix with high amounts of amorphous silica, leading to improved performance of GEOPAV blocks.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Chemistry, Physical
Salim Barbhuiya, Edmund Pang
Summary: This study examines the strength and microstructure of geopolymer based on fly ash and a combination of metakaolin and fly ash, exploring ways to limit or eliminate the usage of Portland cement in concrete.
Article
Materials Science, Textiles
P. Manimaran, S. P. Saravanan, M. Prithiviraj
Summary: The study characterizes the fibers from the bark of Ficus racemosa, revealing them as suitable for polymer composite reinforcement due to their composition of cellulose, hemicellulose, and lignin, specific thermal properties, and crystalline structure.
JOURNAL OF NATURAL FIBERS
(2021)
Article
Chemistry, Physical
Canan Turan, Akbar A. Javadi, Raffaele Vinai, Giacomo Russo
Summary: This study found that the addition of alkali-activated fly ash as a stabilising agent significantly improved the behaviour of clay soil. The optimal activation parameters were alkali dosages in the range of 12% to 16% and a silica modulus of 1.25. The alkali-activated fly ash increased the compressive strength of the stabilised soil and altered its mineral composition and microstructure.
Article
Construction & Building Technology
Saloni Arora, Parveen Jangra, Thong M. Pham
Summary: Utilizing industrial by-products in concrete can help reduce the depletion of raw materials, but it may affect the concrete's performance. This study focused on geopolymer concrete developed from fly ash and fine rice husk ash, with partial OPC substitution. Various properties were investigated to assess the strength and durability of the concrete. The results showed that 20% OPC substitution improved workability, while 15% OPC substitution achieved the highest compressive strength and durability performance.
STRUCTURAL CONCRETE
(2023)
Article
Chemistry, Multidisciplinary
Tuan Anh Le, Sinh Hoang Le, Thuy Ninh Nguyen, Khoa Tan Nguyen
Summary: The research demonstrates the significant impact of FCC residue on the mechanical properties of geopolymer concrete, including compressive strength, flexural strength, and elastic modulus. With increasing FCC residue content, a decrease in compressive and flexural strength was observed at AL:GS ratios of 0.4 and 0.5, but an improvement in strength was seen at an AL:GS ratio of 0.65.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Huajie Liu, Yuhuan Bu, Ali Nazari, Jay G. Sanjayan, Zhonghou Shen
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2017)
Article
Energy & Fuels
Alireza Tashakori Abkenar, Ali Nazari, Shantha D. Gamini Jayasinghe, Ajay Kapoor, Michael Negnevitsky
IEEE TRANSACTIONS ON ENERGY CONVERSION
(2017)
Article
Materials Science, Ceramics
Ali Bagheri, Ali Nazari, Jay G. Sanjayan
CERAMICS INTERNATIONAL
(2018)
Article
Materials Science, Ceramics
Ahmed Graytee, Jay G. Sanjayan, Ali Nazari
CERAMICS INTERNATIONAL
(2018)
Article
Construction & Building Technology
Sarah Al-Qutaifi, Ali Nazari, Ali Bagheri
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Construction & Building Technology
A. Mohammed, J. G. Sanjayan, A. Nazari, N. T. K. Al-Saadi
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Green & Sustainable Science & Technology
Ali Bagheri, Ali Nazari, Ailar Hajimohammadi, Jay G. Sanjayan, Pathmanathan Rajeev, Mostafa Nikzad, Tuan Ngo, Priyan Mendis
JOURNAL OF CLEANER PRODUCTION
(2018)
Article
Construction & Building Technology
Hsiao Yun Leong, Dominic Ek Leong Ong, Jay G. Sanjayan, Ali Nazari, Sze Miang Kueh
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2018)
Article
Construction & Building Technology
Hsiao Yun Leong, Dominic Ek Leong Ong, Jay G. Sanjayan, Ali Nazari
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2018)
Article
Materials Science, Ceramics
Ali Bagheri, Ali Nazari, Jay G. Sanjayan, Wenhui Duan
CERAMICS INTERNATIONAL
(2018)
Article
Construction & Building Technology
Ali Nazari, Ali Bagheri, Jay G. Sanjayan, Melissa Dao, Chathumini Mallawa, Peita Zannis, Samuel Zumbo
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Chemistry, Physical
Behzad Nematollahi, Praful Vijay, Jay Sanjayan, Ali Nazari, Ming Xia, Venkatesh Naidu Nerella, Viktor Mechtcherine
Article
Materials Science, Multidisciplinary
Shin Hau Bong, Behzad Nematollahi, Ming Xia, Ali Nazari, Jay Sanjayan
Proceedings Paper
Construction & Building Technology
Shin Hau Bong, Behzad Nematollahi, Ali Nazari, Ming Xia, Jay G. Sanjayan
FIRST RILEM INTERNATIONAL CONFERENCE ON CONCRETE AND DIGITAL FABRICATION - DIGITAL CONCRETE 2018
(2019)
Article
Construction & Building Technology
Alyaa Mohammed, Jay Sanjayan, Ali Nazari, Nihad T. K. Al-Saadi, Wenhui Duan
ACI MATERIALS JOURNAL
(2017)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
