Article
Construction & Building Technology
Hongyou Shan, Jinxia Xu, Yuanhai Jiang, Hongfei Liu, Gang Zheng, Guomin Cui
Summary: This article presents an electrochemical method for enhancing the durability of cement mortar by injecting nanoparticles (Al2O3 coated SiO2). The nanoparticles are injected into the pores of cement mortar under an external electrical field, resulting in a refined pore structure. The effectiveness of the electro-injection nanoparticle treatment was evaluated by monitoring changes in the resistivity of the cement mortar. The durability of the cement mortar was improved in terms of water absorption resistance, carbonation resistance, sulfate resistance, and chloride diffusion resistance through the electro-injection method.
MAGAZINE OF CONCRETE RESEARCH
(2023)
Article
Environmental Sciences
Yue Hua Li, Lin Zhao, Meng Lu Huang, Liang Chen, Song Jin
Summary: This study explored the application of a vertical electrokinetic system (V-EK) to mitigate and prevent soil salinization caused by salt rising from saline groundwater in coastal areas. The results showed that the V-EK system significantly reduced the levels of ions in the surface soil and effectively decreased soil salinity.
LAND DEGRADATION & DEVELOPMENT
(2022)
Article
Construction & Building Technology
Zhaocai Zhang, Bin Yang, Bowen Tai, Yu Zhu
Summary: This study focuses on the long-term inhibitive effect on steel corrosion in chloride-contaminated mortar. Maize gluten meal extract (MGME) is found to preferentially adsorb on steel surface during cement setting and hardening, forming a protective layer that expels chloride ions and maintains the passivation state of steel. The use of 3% MGME in mortar can achieve inhibition efficiency equivalent to commonly used inhibitors such as nitrites and amines.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Congtao Sun, Ming Sun, Tao Tao, Feng Qu, Gongxun Wang, Peng Zhang, Yantao Li, Jizhou Duan
Summary: This study investigated the chloride binding capacity and its effect on the microstructure of mortar made with different types of sand. The results showed diffusion trend of chloride ions, changes in chloride contents, formation of Friedel's salt, and increase in fine capillary pore volume.
Article
Construction & Building Technology
Linhua Jiang, Yalu Niu, Weizhun Jin, Hailang Gao, Lei Chen
Summary: This study evaluates the influence of four cationic chloride salts on the chloride ion diffusion characteristics of alkali-activated slag mortar. The results show that the combination of monovalent cations can promote the chloride ions diffusion, while the combination of monovalent cations and divalent cations has different effects.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Jin Li, Peiyuan Chen, Haibing Cai, Ying Xu, Chunchao Li
Summary: The study found that using rice husk ash as a partial substitute for cement in rubber mortar can increase compressive strength without compromising it, and has positive effects on chloride resistance and capillary absorption. A dosage of 15% RHA was determined to be optimal for these enhancements.
Article
Construction & Building Technology
Lin Yang, Kailong Kang, Danying Gao, Junru Li, Yuncheng Wang, Cheng Liu
Summary: This study investigates the transport of chloride ions in mortars with different saturation degrees. The relationship between the relative chloride diffusion coefficient and initial saturation degree is established, and a numerical model for simulating chloride transport is proposed. The results of this research contribute to a better understanding of chloride transport in concrete and have important implications for durability assessment and service life prediction.
MATERIALS AND STRUCTURES
(2022)
Article
Construction & Building Technology
Deqi Zhu, Aihua Wen, Dianrui Mu, Aiping Tang, Lin Jiang, Wenchuan Yang
Summary: This paper aims to analyze the effect mechanism of cement replacement by zeolite powder on the microscopic pore structure characteristics, macroscopic mechanical behavior, and durability of mortar. The results show that incorporating zeolite powder in cement mortar improves the internal pore structure, reduces porosity and enhances compressive strength and chloride ion penetration resistance.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Hyun-Sub Yoon, Keun-Hyeok Yang, Sang-Seob Lee, Ji-Won Hwang
Summary: This pioneering study examines the significance and limitations of biological mortars, which were originally developed to enhance the salt damage resistance of concrete. Three strains of halophilic bacteria were isolated, and the test results showed that Halomonas venusta exhibited potential in reducing chloride-ion concentration in mortars exposed to salt attacks by consuming chloride ions as an energy source.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Zhiming Ma, Zhiyu Zhang, Ruihan Hu, Xin Liu, Jiaxin Shen, Changqing Wang
Summary: Reusing recycled aggregate (RA) and recycled powder (RP) for fully recycled mortar can effectively reduce construction and demolition waste. This study investigated the chloride transport and resistance improvement of fully recycled mortar incorporating both RA and RP. The results showed that RP had nucleation and filler effects. The addition of RA or RP increased chloride diffusion in mortar. Including RA improved the chloride binding capacity, while mixing RP reduced it. Mixture of various RPs reduced chloride diffusion in fully recycled mortar, with significant decrease seen when adding silica fume or metakaolin.
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS
(2023)
Article
Construction & Building Technology
Guoxu Ma, Jinxia Xu, Zihao Wang
Summary: This paper aims to restrict chloride transport into mortar by partially replacing fine aggregates with quartz sands modified by MgAl-LDH. The results indicate that the modified quartz sands with in-situ-growth MgAl-LDH have improved specific surface area and chloride binding capacity. With the increase in replacement ratio, the resistance of mortar against chloride ion penetration is significantly improved.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
You Wu, Jinxia Xu, Wenjie Gong, Fei Wang
Summary: This study aims to restrain chloride ingress into mortar by using a magnesium alloy sacrificial anode system. The results show that the magnesium alloy mesh can effectively reduce chloride ingress into mortar, with the effectiveness increasing with higher water-cement ratios and chloride concentrations.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Xiangzhou Liang, Yongsheng Ji
Summary: The research found that the chloride ion resistance of geopolymer is better than that of cement mortar, providing better protection for steel bars. The improved ASTM C1202 method is suitable for evaluating the chloride ion permeability of geopolymer mortar, while the critical content of chloride ion in geopolymer mortar is higher than that of cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Jinjie Shi, Xiangdong Guan, Jing Ming, Xiaocheng Zhou
Summary: This study evaluated the influence of red mud on the long-term corrosion resistance of reinforcing steel in mortars exposed to chloride attack and natural carbonation. The higher electrical resistivity of red mud mortar delayed the penetration of chloride ions and the diffusion of oxygen, providing effective protection for the embedded steel. Additionally, the natural carbonation of red mud mortar facilitated the formation of a compact steel-mortar interface, improving the corrosion resistance of the steel.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Construction & Building Technology
Jinjie Shi, Miao Wu, Jing Ming
Summary: The purpose of this study is to investigate the inhibition mechanism of molybdate as a corrosion inhibitor for steel in chloride-contaminated mortars. The results showed that molybdate can improve the corrosion resistance of steel in mortars, although it may have a negative effect on the strength and electrical resistance of the mortars.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Engineering, Aerospace
Pezhman Mardanpour, Ehsan Izadpanahi, Siavash Rastkar, Sylvie Lorente, Adrian Bejan
Article
Thermodynamics
Matthieu Labat, Sylvie Lorente, Mohamed Mosa
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2020)
Article
Multidisciplinary Sciences
A. Bejan, L. Ferber, S. Lorente
SCIENTIFIC REPORTS
(2020)
Article
Thermodynamics
E. S. D. Estrada, E. X. Barreto, L. A. Isoldi, E. D. dos Santos, S. Lorente, L. A. O. Rocha
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2020)
Article
Thermodynamics
Alexandre Malley-Ernewein, Sylvie Lorente
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Multidisciplinary Sciences
Sylvie Lorente, Mathieu Hautefeuille, Aczel Sanchez-Cedillo
SCIENTIFIC REPORTS
(2020)
Article
Construction & Building Technology
Billy Seng, Camille Magniont, Sandra Gallego, Sylvie Lorente
Summary: This study documents the behavior of a hemp-based hygroscopic material at wall scale under various temperature and moisture dynamic conditions. The experiments and numerical model demonstrate how heat and moisture transport phenomena within the wall are coupled, with temperature difference serving as a driving force for moisture release. Moisture adsorption impacts heat release and temperature changes within the wall.
ENERGY AND BUILDINGS
(2021)
Article
Construction & Building Technology
Matthieu Labat, Ion Hazyuk, Matthieu Cezard, Sylvie Lorente
Summary: This paper presents a methodology for obtaining a lumped model based on the identification of the transfer functions for constant airflow rate systems, which can accurately obtain the main heat fluxes at a much lower computational cost. The study found that increasing the number of ducts promotes better indoor temperature stability, while the mass flow rate appeared to be crucial.
JOURNAL OF BUILDING PERFORMANCE SIMULATION
(2021)
Article
Thermodynamics
Xuewei Zhang, Sylvie Lorente, Aaron P. Wemhoff
Summary: This project investigates the use of PCM as a thermal energy barrier, introducing a new efficiency metric. Results show that the predicted thermal barrier efficiency exceeds the limits, offering useful conservative estimates for designing PCM thermal barriers.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Energy & Fuels
Bruna Rodrigues Nunes, Michel Kepes Rodrigues, Luiz Alberto Oliveira Rocha, Matthieu Labat, Sylvie Lorente, Elizaldo Domingues dos Santos, Liercio Andre Isoldi, Cesare Biserni
Summary: Significant advancements have been made in developing earth-air heat exchanger models in the past few decades. The geometric evaluation of different arrangements showed that complex designs can increase thermal potential, while configurations with few curves are beneficial for reducing air pressure drop.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Thermodynamics
Sahin Gungor, Erdal Cetkin, Sylvie Lorente
Summary: A liquid cooling system based on constructal canopy-to-canopy architectures is proposed for efficient thermal management of electric vehicle battery packs. The system can effectively extract the non-uniformly generated heat by the battery cell during the discharging phase. The configuration of the cooling solution is predicted following the constructal methodology, leading to the choice of the hydraulic diameter ratios.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Physics, Applied
Xuewei Zhang, Sylvie Lorente
Summary: In this study, the architecture of capillary flow networks in a steady state is analyzed, and the impact of network morphology on maximum mass flow rate is investigated. A search algorithm is developed to determine the optimal parameters. The results demonstrate the superiority of dendritic structures in the roots and canopy branches of capillary trees.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physiology
Aimee M. Torres Rojas, Sylvie Lorente, Mathieu Hautefeuille, Aczel Sanchez-Cedillo
Summary: The liver plays a crucial role in metabolic homeostasis and has a complex vascular anatomy that can be modeled using the constructal law to predict and simulate processes in liver diseases, healing, and regeneration. The vascular network in the liver is critical for mechanics-related processes and blood flow redistribution in hepatic resilience.
FRONTIERS IN PHYSIOLOGY
(2021)
Proceedings Paper
Construction & Building Technology
M. Cezard, M. Labat, S. Lorente
Summary: This paper documents the design method of an air-based thermally activated building system (TABS) suitable for retrofitting tertiary buildings, mainly for cooling purposes. The design process includes general design, energy balance checks, and development of a numerical model under a finite element method multi-physics environment. The specifications for a 1:1 scale prototype are obtained for construction documentation.
CARBON-NEUTRAL CITIES - ENERGY EFFICIENCY AND RENEWABLES IN THE DIGITAL ERA (CISBAT 2021)
(2021)
Article
Thermodynamics
Sylvie Lorente, Adrian Bejan
HEAT TRANSFER-ASIAN RESEARCH
(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)
