Article
Construction & Building Technology
Qi-Fang Liu, Ray Kai Leung Su, Fei Xu
Summary: This study quantifies the relationship between actual expansion and rust deposition under a certain amount of corrosion by directly monitoring concrete displacement, defining a new parameter called the deposition coefficient of rust to evaluate the actual expansion capacity of rust, and proposing a three-stage conceptual model to predict the deposition coefficient throughout the corrosion process. The research findings suggest that the ratio between concrete displacement caused by the rust layer and the depth of corrosion or thickness of deposited rust is nearly constant before concrete cracking, gradually increasing until reaching a maximum value.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Liusheng Chu, Ye Tian, Danda Li, Yuexi He, Hu Feng
Summary: This paper studied and compared the existing calculation methods for shear capacity of SRC column-steel beam joints from different standards. Through experiments, it was found that the main design parameters were axial compression ratio and concrete slab width, with an increase in the axial compression ratio leading to higher shear capacity of the joints. Additionally, the presence of an RC slab greatly increased the shear capacity of the joints.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Woongik Hwang, Ki Yong Ann
Summary: This study developed a model to simulate the formation of rust and quantify its structural impact in steel reinforced concrete. Variables such as interfacial gap, cover depth, and steel rebar diameter were considered in the model. The results showed that the interfacial gap had the most significant influence on the structural limitation caused by steel corrosion, followed by steel diameter and cover depth. Under a cover depth of 75mm and a steel diameter of 20mm, the rust amount needed to reach yielding varied from 2.66-11.58μm for an interfacial gap of 1-10μm, while the equivalent rust formation ranged from 16.95-27.69μm.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Construction & Building Technology
Xia Qin, Sakdirat Kaewunruen
Summary: This paper provides a comprehensive evaluation of the use of recycled steel fibres in the construction industry, comparing their mechanical properties with industrial steel fibres. It also investigates their contribution to sustainable development and the economy based on global warming potential and price data.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Ivan Trabucchi, Giuseppe Tiberti, Antonio Conforti, Filippo Medeghini, Giovanni A. Plizzari
Summary: Reinforcement solutions, such as steel fibers and rebars, play a crucial role in handling tensile stresses in concrete structures with partially loaded areas. Experimental studies on SFRC specimens have shown that steel fibers enhance the splitting bearing capacity and the orientation of fibers is vital in determining structural performance.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Lu Zhang, Ditao Niu, Hui Li, Bo Wen, Ying Wang
Summary: The rust expansion cracking behavior of Cr alloy-reinforced coral aggregate concrete (CAC) was investigated to analyze the serviceability limit state. The composition of corrosion products on Cr alloy rebar was analyzed to determine the stability and protection of the rust layer. A critical corrosion ratio model for Cr alloy-reinforced concrete was established, considering various factors. The results showed that adding Cr alloy to carbon rebar improved the stability and protection of the rust layer, resulting in prolonged reinforcement corrosion time and delayed concrete cracking.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Fakhri Javahershenas, Morteza Sohrabi Gilani, Mohammad Hajforoush
Summary: This experimental study investigated the effect of uniform magnetic field (UMF) exposure time on the mechanical and microstructural behaviors of steel fiber-reinforced concrete (SFRC). The results showed an increase in mechanical strength of SFRC with longer UMF exposure time, particularly in specimens containing 0.7% steel fibers. Additionally, ultrasonic testing revealed an enhanced bond between cement paste and steel fibers with increasing UMF exposure time.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Yueming Wang, Changdan Wang, Shunhua Zhou, Mou Sun, Kaiwei Liu, Wenjie Ma, Haoran Xu
Summary: In this study, an electrophoretic deposition repair method using a high-performance colloid solution containing water-based cationic epoxy resin was proposed to address the rusting and cracking of reinforced concrete structures. The effect of electrophoretic deposition on rust-cracked reinforced concrete was studied, and the mesoscopic and microscopic morphologies of the repaired concrete surface, cracks, and defects at the interface of reinforced concrete were examined. The results showed that electrophoretic deposition successfully improved the internal compactness, compressive strength, and tensile strength of reinforced concrete while reducing water absorption and carbonation depth.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Construction & Building Technology
Huy Tang Bui, Kang Hai Tan
Summary: This paper proposes a mathematical model based on the Asymmetrical Generalised von Mises distribution (AGvM model) to simulate the distribution of multi-peak asymmetrical rust layer around the steel bar. An advanced 3D finite element (FE) model is developed to simulate corrosion-induced concrete cracking, incorporating the rust distribution obtained from the AGvM model. Experimental validation shows that the proposed AGvM model outperforms the existing mathematical models in simulating rust distribution, especially in cases of two peaks and highly asymmetrical distribution. The 3D FE model can reasonably predict internal and surface crack patterns, as well as the evolution of surface crack width.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Construction & Building Technology
Alisson Clay Rios da Silva, Bianca Mendes Almeida, Mathaus Moraes Lucas, Veronica Scarpini Candido, Kamila Sindy Pinheiro da Cruz, Michelle Souza Oliveira, Afonso Rangel Garcez de Azevedo, Sergio Neves Monteiro
Summary: Geopolymer concrete (GCC) is a high-performance concrete that uses a geopolymer mass to bond materials, and its development is crucial for producing eco-friendly concrete. Experimental results show that GCC reinforced with steel fiber has better fatigue behavior compared to ordinary Portland concrete (OPCC).
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Crystallography
Fahed Alrshoudi
Summary: The study investigated the effectiveness of textile-reinforced concrete (TRC) and steel-reinforced concrete (SRC) in the flexural performance of rectangular concrete beams. It found that anchoring the textiles at both ends enhanced load resistance and prevented sliding, and that TRC beams exhibited higher ultimate load and lower deflection compared to SRC beams. The ideal cover thickness was determined to be 30 mm for TRC beams.
Article
Construction & Building Technology
Lijie Chen, Ray Kai Leung Su
Summary: The geometry of rebars, such as rib shape and diameter, has significant effects on the steel-concrete interface. Corrosion initiation of vertical rebars is associated with interfacial porosity and the local water content near horizontal rebars is influenced by rebar diameter.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Mechanics
Wenyuan Kong, Wenbo Zhou, Libo Chen, Qinglong Liao, Yao Zhu, Yu Chen
Summary: The filling position of steel fiber reinforced concrete (SFRC) has a significant influence on the flexural behavior of stainless steel tubular truss. Filling the chord with SFRC can improve the bearing capacity of the truss, and the optimal filling method can be determined through stress analysis.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Fahed Alrshoudi
Summary: Experimental investigation on textile-reinforced concrete (TRC) beams showed differences in failure behavior and tension stiffening compared to conventional steel-reinforced concrete (SRC) beams, with TRC beams exhibiting 56% higher moment capacity and 7 times higher tension stiffening.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Wenda Xu, Lin Yang, Danying Gao, Jiyu Tang, Guowen Sun, Yunsheng Zhang
Summary: This study investigates the mechanical properties of seawater-SFRC exposed to a high humidity environment for 27 months, considering the carbonation effect. The results show that the mechanical properties of non-carbonized SFRC specimens improve and stabilize after 15 months of exposure. However, pre-carbonized SFRC specimens exhibit a decrease in axial compressive toughness and flexural properties after 15 months, with corrosion of steel fibers near the surface. This study provides valuable evidence for the potential application of seawater-SFRC.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Zhichao Shang, Xiaoping Cai, Farshid Pahlevani, Yan Zheng, Akbar Hojjati-Najafabadi, Xinran Gao, Baojing Zhang, Peizhong Feng
Summary: High porosity Co-Al-Fe intermetallics with 3D-microstructures were successfully synthesized in one step via a thermal explosion reaction. The link between pore structure and permeability was investigated using 3D-XRM technology. The corrosion resistance of the samples with different Fe contents was studied at 900 degrees C under an oxygen/sulphur atmosphere for up to 120 h. The results showed that the samples maintained stable pore structure and intact internal matrices, attributed to the formation of a thin protective layer on the surface. In addition, inward diffusion of S resulted in the formation of FeS nodules.
Article
Materials Science, Multidisciplinary
Lian Ma, Hain Yang, Daquan Zhang, Wei Wu
Summary: In this study, an environmentally friendly volatile corrosion inhibitor, lysine salts (LA), was prepared between graphene oxide (GO) layers using an in situ intercalation technique. The corrosion inhibition effect of LA was evaluated, and it was found that LA-GO2 achieved a 99.3% corrosion inhibition efficiency after composition optimization. The inhibition of the electrochemical anodic process on the surface of mild steel was the main reason for the high corrosion inhibition efficiency of LA-GO2. The properties of the surface film on the corroded steel were also characterized in detail to understand the corrosion inhibition mechanism of LA-GO2.
Article
Materials Science, Multidisciplinary
Running Wang, Jiaping Zhang, Bing Liu, Jie Fei, Qiangang Fu
Summary: By introducing a tailored SiC-C interphase, the carbon fiber can be effectively protected, improving the mechanical and ablation properties of leading edge shaped C/C-ZrC-SiC composites.
Article
Materials Science, Multidisciplinary
Zihua Wang, Chijia Wang, Ruitao Wang, Jiapeng Deng, Kun Zhang, Yanji Zhu, Huaiyuan Wang
Summary: A robust anti-corrosive coating has been developed using functional fly ash, which demonstrates excellent corrosion resistance and improved mechanical properties. The coating achieves these enhancements through molecular cross-linking design and surface augmentation techniques, resulting in a significantly improved impedance modulus compared to pure polyurea coatings.
Article
Materials Science, Multidisciplinary
Haofei Sun, Meifeng Li, Hao Zhang, Jing Liu
Summary: The oxidation behavior of FeCrNi medium entropy alloy was investigated through experimental observations and density functional theory (DFT) calculations. The study found that at 900 degrees C, the alloy forms a desirable and continuous oxide layer, while at 1000 degrees C, the oxide layer becomes discontinuous with penetration of oxide. These observations highlight the significant role of phase structure in promoting the formation of protective oxide scales and influencing oxidation resistance.
Article
Materials Science, Multidisciplinary
Yang Li, Ke Ma, Jingjun Xu, Jingjing Li, Yueming Li, Yi Zhang, Jun Zuo, Meishuan Li
Summary: Cr2AlC diffusion barrier effectively blocks the diffusion of Ti, enhancing the stability and spalling resistance of the Al2O3 scales between NiCrAlY coating and TiAl alloy.
Article
Materials Science, Multidisciplinary
Weiyi Wang, Qinglin Pan, Xiangdong Wang, Bing Liu
Summary: By adding Ce, Sc, Y and Zr elements to Al-Mg-Si alloy, the microstructure of the alloy can be regulated, and the corrosion and heat resistance of the materials can be improved.
Article
Materials Science, Multidisciplinary
Andrea Cristoforetti, Javier Izquierdo, Ricardo M. Souto, Flavio Deflorian, Michele Fedel, Stefano Rossi
Summary: This study presents a new approach to studying the mechanism of filiform corrosion in organic coated steel using the scanning vibrating electrode technique (SVET) and micropotentiometry (potentiometric SECM). The electrochemical activity under the coating was evaluated by mapping the ionic current densities coming from artificial defects made in specific locations of the filament. Antimony tips were also used to investigate the pH changes associated with different corrosion reactions at the metal-paint interface. Local pH levels along the filament in the anodic and cathodic regions were determined.
Article
Materials Science, Multidisciplinary
Yang Gao, Dayun Sun, Zhu Liu, Shuo Cong, Rui Tang, Yanping Huang, Lefu Zhang, Xianglong Guo
Summary: The corrosion characteristics of a novel alumina-forming austenitic steel in high-pressure high-temperature water environment were studied. The addition of aluminum has a negative effect on the continuity of the alumina scale.
Article
Materials Science, Multidisciplinary
Negin Madelat, Benny Wouters, Peter Visser, Zahra Jiryaeisharahi, Kristof Marcoen, Shoshan T. Abrahami, Annick Hubin, Herman Terryn, Tom Hauffman
Summary: This work explores the correlation between electrolyte transport properties and the variation of pigment volume concentration (PVC) in organic coatings. An odd random phase electrochemical impedance spectroscopy (ORP-EIS) approach is used to analyze the diffusion of ions independent from water uptake. The results show that a higher PVC leads to a more homogeneous coating structure, resulting in faster diffusion of ions and enhanced water uptake.
Article
Materials Science, Multidisciplinary
Eloa Lopes Maia, Serguei Gavrilov, Valentyn Tsisar, Kitty Baert, Iris De Graeve
Summary: The effect of pre-oxidation in air at 300-500°C on the initiation and development of liquid metal corrosion attack on 316L austenitic steel in static lead-bismuth eutectic (LBE) has been investigated. It was found that pre-formed oxide films can protect the surface against dissolution, while high temperature pre-oxidation leads to localized corrosion.
Article
Materials Science, Multidisciplinary
Baozhuang Sun, Qiuyu Wang, Yue Pan, Zhiyong Liu, Cuiwei Du, Xiaogang Li
Summary: In this study, a non-steady electrochemical model was established to investigate stress corrosion cracking (SCC). The model was verified using 304 SS with various microstructures, confirming its effectiveness in assessing SCC susceptibility.
Article
Materials Science, Multidisciplinary
Xingyu Xiao, Xinhua Liu, Zhilei Wang, Xuexu Xu, Mingying Chen, Jianxin Xie
Summary: The corrosion behavior and mechanisms of Cu-10Ni-X (Al, Fe, Mn, Cr, Sn, Ti, Zn) alloys in a 3.5% NaCl solution were systematically investigated. Both computational and experimental results revealed that except Ti, other elements could enhance the corrosion resistance of Cu2O passivation film.
Article
Materials Science, Multidisciplinary
Gen Zhang, Yan-Ping Huang, E. Jiang, Wei -Wei Liu, Hong Yang, Jing Xiong, Yong-Fu Zhao
Summary: The addition of aluminum has a significant influence on the intermetallic compounds in AFA alloys, particularly increasing the content of B2-NiAl phase. In the SCO2 environment, the oxide scales formed on AFA alloys with aluminum were thinner than on ASS without aluminum, and the structure of the oxide scales changed to a double-layer structure.
Article
Materials Science, Multidisciplinary
Yuxuan He, Guozheng Xiao, Chao Wang, Xuefeng Lu, Liuyuan Li, Shiying Liu, Yusheng Wu, Zhanjie Wang
Summary: The relationship between configurational entropy and lattice distortion in novel rare earth monosilicates was investigated, and the effect of configurational entropy on their properties was studied. The results showed that lattice distortion increased with the increase of configurational entropy, but a highly symmetrical crystal structure was formed when the configurational entropy was large enough, inhibiting the lattice distortion.