Article
Construction & Building Technology
Junlong Du, Xiaosheng Wei, Cong Tian
Summary: In this research, the shrinkage cracking and fracture properties of fiber-reinforced cementitious composites (FRCC) were studied. It was found that increasing the polyvinyl alcohol (PVA) fiber content can effectively reduce crack width, delay cracking time, and enhance fracture toughness and fracture energy. PVA fibers play a crucial role in extending the intermediate stage of cementitious materials and delaying energy release rate during failure.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Mechanical
Hua Rong, Wei Dong, Wenyan Yuan, Xiangming Zhou
Summary: In the improved ring test, shrinkage cracks first initiate from the preset crack and then propagate towards the outer circumference, with self-restraint providing crack insistence and steel ring restraint driving the shrinkage cracking. The non-uniform moisture distribution causes a bending effect along the radial direction. The elliptical geometry increases the restraining level, offering advantages in advancing shrinkage cracking and enhancing steel ring restraint.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Nanoscience & Nanotechnology
Dianbo Zhang, Minyue Zhang, Jingwen Wang, Hongling Sun, Hu Liu, Liwei Mi, Chuntai Liu, Changyu Shen
Summary: This study investigates the impedance sensing mechanism of an axon-like ionic conductive hydrogel strain sensor, which exhibits a negative ion concentration-dependent impedance sensing behavior. The hydrogel sensor shows good strain amplitude identifiability, ultralow detection limit, excellent rate independence, and outstanding long-term fatigue resistance. An equivalent circuit model is built to understand the internal sensing mechanism, and the skin-core structure is designed to improve impedance responsivity.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Graziella Scandurra, Emanuele Cardillo, Carmine Ciofi, Luigi Ferro
Summary: This paper presents a method using Electrical Impedance Spectroscopy to characterize different commercial milks, allowing for classification of types and detection of lactose-free milk. It also has the capability to identify milk degradation before it is visible and distinguish between storage conditions and expiry.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Minfei Liang, Zhenming Li, Shan He, Ze Chang, Yidong Gan, Erik Schlangen, Branko Savija
Summary: This study examines the early-age stress evolution of GGBFS concrete through experiments and numerical modeling, finding that the high autogenous expansion of GGBFS leads to initial compressive stress and the codes underestimate the early-age creep of GGBFS. The proposed Bayesian Optimization inverse modeling method can effectively adjust the aging terms to improve modeling accuracy.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Maha A. Abusogi, Mudthir Bakri
Summary: This study introduces a new eccentric ring test method to investigate the cracking behavior of restrained cement materials and improve the cracking properties of cementitious composites using polypropylene fibers. Through experiments and regression modeling, the cracking behavior was successfully predicted.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Review
Biochemical Research Methods
Yang Liu, DongMing Li, Ji Qian, Bao Di, Gang Zhang, ZhenHui Ren
Summary: This review summarizes the application of electrical impedance spectroscopy (EIS) in plant root measurement, discussing experimental schemes, instruments, electrode, excitation frequency range, root electrical characteristics, equivalent circuit, and the combination of EIS with artificial intelligence. It suggests future research should focus on the miniaturization of measurement equipment, standardization of planting environment, and intelligentization of root diagnosis.
Article
Construction & Building Technology
Porsiem Tang, Ali Amin, R. Ian Gilbert, Walter Kaufmann
Summary: This paper presents a rational approach to describe the cracking behavior of fully- and partially restrained fiber reinforced concrete members under the influence of axial force caused by shrinkage. The proposed model extends the existing approach to account for post-cracking strength offered by the fibers and the effects of partial end-restraint, providing a better understanding of the cracking mechanism.
STRUCTURAL CONCRETE
(2023)
Article
Polymer Science
Jung Heum Yeon
Summary: The study demonstrates that internal curing through SAP effectively mitigates early-age residual stress build-up from autogenous shrinkage. However, the addition of SAP, regardless of type and content, does not significantly improve the shrinkage cracking resistance of mortar directly exposed to drying conditions.
Article
Construction & Building Technology
Miao Hong, Dong Lei, Feipeng Zhu, Pengxiang Bai, Jintao He
Summary: This study conducted mesoscale experimental research to investigate the effect of aggregate restraint on local deformation and cracking of early-age cement. The digital image correlation (DIC) method and a microscope were utilized to measure the deformation and cracking of the specimens. The principal strain was analyzed, and the effect of aggregate geometries and the interface transition zone (ITZ) on restrained shrinkage was discussed. Additionally, a cracking index was proposed to quantify the degree of cracking.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Construction & Building Technology
Jinsheng Han, Jingming Cai, Jinlong Pan, Yuqin Sun
Summary: The study successfully developed a self-sensing high ductility cementitious composite by adding carbon fibers. The material's conductivity decreases with curing age when CF content is below the percolation threshold, but increases with moisture content and temperature. When CF content is above the percolation threshold, electronic conduction dominates the conductive behavior.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Jianwen Shao, Han Zhu, Gang Xue, Yong Yu, Said Mirgan Borito, Wenlixia Jiang
Summary: The study found that the combination of rubber particles and United Expansive Agent (UEA) has significantly improved the reduction of cracking risks in concrete. The incorporation of smaller-sized rubber particles reduces strength loss and contributes more to shrinkage reduction. Additionally, cracks in specimens are mostly restricted to the expected areas.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Ceramics
Yanyan Huo, Qiang Yang, Sian Chen, Songhe Meng, Jingyu Zhao, Jieyu Jiang
Summary: The AC impedance response to damage in C/SiC composites was investigated. Results showed that the longitudinal deformation increases the impedance magnitude and the phase angle, while the damage causes the impedance magnitude to increase and the phase angle to decrease. The phase angle is significantly sensitive to fiber breakage, making AC-based method more suitable for online damage monitoring and final failure warning.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
V. Kavaliuk, T. Salkus, A. Kezionis, M. M. Pop, I. P. Studenyak
Summary: The electrical properties of the 90% Ag3AsS3-10% As2S3 composite and Proustite (Ag3AsS3) were investigated using impedance spectroscopy. The electrical conductivity mechanism in the Ag3AsS3-As2S3 composite was explained by proposing an equivalent circuit, considering the microstructure of the sample and the interrelation of the composite constituents. It was suggested that the overall electrical conductivity of the composite can be increased by doping a small amount of As2S3 with Ag+ ions from Ag3AsS3.
SOLID STATE IONICS
(2022)
Article
Mathematics, Interdisciplinary Applications
Todd J. Freeborn, Shelby Critcher
Summary: This study showed statistically significant differences in the Cole-impedance model parameters between different body segments, indicating a need for further research into the physiological or geometric features of biological tissues linked with the fractional-order (alpha) represented by the Cole-impedance model.
FRACTAL AND FRACTIONAL
(2021)
Article
Construction & Building Technology
O. Burkan Isgor, W. Jason Weiss
MATERIALS AND STRUCTURES
(2019)
Article
Construction & Building Technology
Chunyu Qiao, Prannoy Suraneni, Then Nathalene Wei Ying, Antara Choudhary, Jason Weiss
CEMENT & CONCRETE COMPOSITES
(2019)
Editorial Material
Green & Sustainable Science & Technology
Aleksandra Radlinska, Jason Weiss
Article
Construction & Building Technology
Ali Riza Erbektas, O. Burkan Isgor, W. Jason Weiss
CEMENT & CONCRETE COMPOSITES
(2019)
Article
Construction & Building Technology
Jedadiah F. Burroughs, Jason Weiss, John E. Haddock
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Construction & Building Technology
Hadi S. Esmaeeli, Mehdi Shishehbor, W. Jason Weiss, Pablo D. Zavattieri
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Construction & Building Technology
Chunyu Qiao, Mehdi Khanzadeh Moradllo, Hope Hall, M. Tyler Ley, W. Jason Weiss
ACI MATERIALS JOURNAL
(2019)
Article
Construction & Building Technology
Deborah Glosser, Antara Choudhary, O. Burkan Isgor, W. Jason Weiss
ACI MATERIALS JOURNAL
(2019)
Review
Construction & Building Technology
Scott H. Smith, Chunyu Qiao, Prannoy Suraneni, Kimberly E. Kurtis, William J. Weiss
CEMENT AND CONCRETE RESEARCH
(2019)
Article
Construction & Building Technology
Ali Riza Erbektas, O. Burkan Isgor, W. Jason Weiss
ACI MATERIALS JOURNAL
(2020)
Article
Construction & Building Technology
Francisco Montes, Tengfei Fu, Jeffrey P. Youngblood, Jason Weiss
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Ghazal Sokhansefat, Masoud Moradian, Mark Finnell, Amir Behravan, M. Tyler Ley, Catherine Lucero, Jason Weiss
CEMENT & CONCRETE COMPOSITES
(2020)
Article
Engineering, Civil
Mallory A. Westbrook, Rita M. Ghantous, W. Jason Weiss, Jon S. Belkowitz
Summary: This paper examines the use of two nano silica materials as an additive to reduce the susceptibility of concrete to deicing salt damage. It shows that the addition of nano silica can effectively reduce the formation of calcium oxychloride in concrete, thus improving its resistance to deicing salts.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Materials Science, Multidisciplinary
Mitch House, Liqiu Cheng, Kathy Banks, Jason Weiss
ADVANCES IN CIVIL ENGINEERING MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Alex T. Coyle, Robert P. Spragg, Prannoy Suraneni, Armen N. Amirkhanian, Marisol Tsui-Chang, William Jason Weiss
ADVANCES IN CIVIL ENGINEERING MATERIALS
(2019)
Article
Construction & Building Technology
Diego J. De Souza, Leandro F. M. Sanchez, Juarez Hoppe Filho, Marcelo H. F. Medeiros
Summary: This paper evaluates the physical and chemical properties of mortar mixtures with different binders and exposed to different sulphate solutions. A theoretical approach to describe the susceptibility of cementitious mixtures against sulphate attack is proposed. The results show that the amount of portlandite and the potential of ettringite formation are well correlated with the expansion and damage caused by sulphate attack.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Yu Chen, Hossein Rahmani, Erik Schlangen, Og uzhan Copurog
Summary: This study presents a method to accelerate the production of limestone-calcined clay-based cementitious materials using Ca(NO3)2 solution in 3D printing, and investigates the effects of adding Ca(NO3)2 solution on the material's properties. The results show that adding Ca(NO3)2 solution can improve buildability, accelerate initial setting, and increase compressive strength.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jing Xu, Xianzhi Wang, Wu Yao, Qing Chen, Hehua Zhu, Surendra P. Shah
Summary: Concrete cracks in marine engineering are caused by the hostile seawater environment, leading to serious deterioration of infrastructures. Microbial induced carbonate precipitation (MICP) is an effective and environmentally friendly approach for self-healing of concrete cracks. However, the formation and structure of MICP products for crack healing in seawater are still unclear, which hinders the application of MICP in marine structures.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhenbo Wang, Peng Sun, Yurun Fan, Yudong Han, Yudong Hu
Summary: This study investigates the potential use of engineered cementitious composites (ECCs) with strain-hardening and self-healing characteristics as a cover material in wet coral sand exposure. The results show that ECCs can effectively close cracks, reduce water permeability, and restore the load-carrying capacity of structures. Additionally, lower strain levels are associated with decreased rebar corrosion.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhengxian Yang, Xiaoli Xiong, Kang Li, Bruno Briseghella, Giuseppe Carlo Marano, Shanghong Chen
Summary: This study investigates the long-term volume stability and strength development of engineered cementitious composites (ECC) containing high-volume steel slag (SS). It is found that the strength of ECC with SS starts to decline after 90 days, while the decline is more significant compared to the matrix. The expansion of SS reduces the fracture toughness of the matrix, leading to an increase in toughness and ductility of the ECC. The introduction of ground granulated blast furnace slag (GGBFS) and PVA fibers can reduce the volume expansion and strength loss caused by SS expansion.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Bin Xi, Zhewen Huang, Salam Al-Obaidi, Liberato Ferrara
Summary: This study investigates the self-healing capabilities of Ultra-High Performance Concrete (UHPC) under the combined influence of mechanical and environmental factors. The results reveal that UHPC with narrow cracks exhibits a higher degree of self-healing, especially when exposed to tap water. Furthermore, prolonged exposure mitigates the inhibitory effect of aggressive ions on self-healing.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhichao Xu, Huayang Sun, Yanlin Huo, Minjie Jia, Zhitao Chen, Yingzi Yang
Summary: In this study, MXene was used to modify the surface of polyethylene fiber, improving the interfacial properties and tensile properties of strain hardening cementitious composites. The MXene-coated fiber showed increased tensile stress and strain, reduced crack width and spacing, and enhanced frictional bond strength between the fiber and matrix.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Bao Lu, Yeqiang Zhou, Lei Jiang, Zhensen Liu, Guihua Hou
Summary: This study investigated the leaching rate of Ca2+ from magnesium slag (MS) and developed a leaching-carbonation method to convert MS into high-purity vaterite and supplementary cementitious materials. The wet carbonation process with glycine as a crystal modifier successfully produced spherical vaterite with high purity and surface area. The leachate solid residue (LSR) obtained from the leaching process of MS showed a smaller size destruction and higher surface area compared to Portland cement, leading to accelerated hydration process and improved compressive strength and pore structure development. This work provides a novel treatment method for MS and enables its high value-added utilization.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Gustavo Henrique Nalon, Jose Carlos Lopes Ribeiro, Leonardo Goncalves Pedroti, Roberto Marcio da Silva, Eduardo Nery Duarte de Araujo, Gustavo Emilio Soares de Lima
Summary: The mechanical behavior of mortar joints is crucial for masonry's structural performance. This study investigated the effects of different lime/cement ratios and carbon black nanoparticles content on the properties of mortars. The results showed that increasing lime content decreased mortar strength but increased self-sensing properties at the end of the percolation zone.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Yifei Wang, Lei Lei, Caijun Shi
Summary: The effects of DEIPA and EDIPA at dosages of 0.02% and 0.05% on the hydration and strength development of cement-fly ash-limestone ternary blend were investigated. It was found that both dosages of DEIPA and EDIPA promote the chemical effect of limestone and the hydration of aluminates from cement and fly ash. The hydration of silicates was accelerated by 0.02% of DEIPA or EDIPA but delayed by 0.05% due to excessive aluminates hydration. DEIPA and EDIPA also refine the pore structure and increase compressive strength of the blend mortar.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Du Pan, Ditao Niu, Zongjin Li
Summary: A thick-walled cylinder model was developed in this study to analyze the cracking behavior of seawater sea-sand concrete (SSC) cover. Damage variables were introduced to determine the extent of damage for each cracked ring, and a predictive model for the cracking time of SSC cover was established. The accuracy of the model was verified using the Digital Image Correlation (DIC) technique.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jiangyu Wu, Hong S. Wong, Hao Zhang, Qian Yin, Hongwen Jing, Dan Ma
Summary: This study explores a method of strengthening cemented rockfill by using well-graded gangue and partially replacing Portland cement with fly ash and a premixed low-alkalinity activator. The research investigated the effects of activator dosage and curing time on the mechanical properties, composition, and microstructure of cemented rockfill. Results show improved performance with low cement content and the use of a low-cost activator. The addition of premixed activator to fly ash enhanced the formation of specific minerals and caused densification of the microstructure. The study reveals an effective and low-cost method for recycling mining wastes and reducing cement.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Juntao Dang, Xiaosong Tang, Jianzhuang Xiao, Aihong Han
Summary: This study proposes a solution to improve the fresh stability and thermal insulation of alkali-activated foamed concrete by adding recycled brick powder. The study investigates the effects of activator modulus and Na2O concentration on the properties of alkali-activated foamed concrete with different bases. The presence of alkaline activator negatively affects the foamability and foam stability, but adjusting the activator concentration can achieve shorter initial setting time and higher fluidity loss. In addition, the increased activator concentration resulted in changes in the pore structure of the foamed concrete.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jiandong Zuo, Bo Wu, Biqin Dong, Feng Xing, Jun Ma, Guanqi Wei
Summary: Nitrite ion intercalated Ca-Al and Mg-Al layered double hydroxides (LDHs) were successfully synthesized using two modified methods. The Ca-Al LDH synthesized by hydrothermal method (H-C-LDH) exhibited the best properties. The intercalated LDHs improved the mechanical properties, chloride penetration resistance, and permeability resistance of cement mortars without affecting the fluidity. Additionally, the intercalated LDHs provided better corrosion resistance.
CEMENT & CONCRETE COMPOSITES
(2024)
Review
Construction & Building Technology
Jingbin Yang, Zhenping Sun, Nele De Belie, Didier Snoeck
Summary: This review paper provides an overview of internal curing mechanism, common internal curing agents, and the most promising agent-superabsorbent polymers in alkali-activated materials (AAM) systems. The introduction of voids by internal curing agents typically has a negative impact on mechanical properties, but continuous water release during internal curing counteracts this effect by promoting hydration. While the effect of internal curing in reducing autogenous shrinkage of AAM systems has been well-established, the impact on drying shrinkage varies widely in different studies.
CEMENT & CONCRETE COMPOSITES
(2024)