Article
Thermodynamics
Imtiaz Ali Laghari, A. K. Pandey, M. Samykano, Belqasem Aljafari, K. Kadirgama, Kamal Sharma, V. V. Tyagi
Summary: Solar energy is a plentiful renewable energy source that can meet the growing demand. Thermal energy storage using phase change material (PCM) is a promising technique, but PCM's low thermal conductivity limits its use. Enhancing thermal conductivity with nanomaterials, such as graphene nanoparticles, is a solution to overcome this issue.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Energy & Fuels
R. Harish
Summary: This study numerically investigates the thermo-magnetic turbulent convection induced melting of nanoenriched paraffin wax dispersed with hybrid magnetic nanoparticle pairs. The dispersion of hybrid nanoparticle pairs enhances the melting fraction and average Nusselt number of paraffin wax. The natural convection induced melting generates quadruplet thermal plume patterns.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Qiao Xu, Xianglei Liu, Qingyang Luo, Yang Tian, Chunzhuo Dang, Haichen Yao, Chao Song, Yimin Xuan, Junming Zhao, Yulong Ding
Summary: This study proposes an eco-friendly SiC ceramic based on loofah-derived materials for efficient solar thermal energy storage. After impregnation with NaCl-NaF eutectics, the ceramic demonstrates broadband solar absorption, rapid thermal transport, and compact latent heat storage.
ENERGY STORAGE MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Feilong Shao, Lingling Wang, Rongrong Luo, Wei Yu, Huaqing Xie
Summary: In this study, a shape-stable hybrid emulsion gel (EGel/GO) was developed through Pickering emulsion polymerization, which combines sodium acetate trihydrate (SAT) and paraffin wax (PW). The polymer dual-phase cross-linking in EGel/GO enhances the material's shape stability, slows the loss of crystalline water in hydrates, and reduces supercooling. Addition of graphene oxide (GO) increases the optical absorption properties of EGel/GO-0.5, resulting in a high photothermal conversion efficiency of 89.1%. Furthermore, EGel/GO has high latent heat and no leakage or phase separation, making it an ideal choice for effective utilization of solar energy and building energy storage.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Thermodynamics
Sheng Yang, Xue-Feng Shao, Jia-Hao Luo, Seyedmohsen Baghaei Oskouei, Ozgur Bayer, Li-Wu Fan
Summary: Recovering medium-temperature industrial waste heat through latent heat thermal energy storage (LHTES) can significantly reduce fossil fuel consumption. A cascade LHTES system combining erythritol and paraffin wax units was proposed to recover waste heat during charging and increase heat supply temperature during discharging. Prototype testing showed that the cascade system improved waste heat recovery efficiency from 15.8% to 63.4% and increased the average heat supply temperature from 37°C to 53.6°C. This highly efficient cascade LHTES system has great potential for decarbonized space heating.
Article
Chemistry, Physical
Q. Xu, X. Liu, Q. Luo, Y. Song, H. Wang, M. Chen, Y. Xuan, Y. Li, Y. Ding
Summary: This study presents a strategy for ultrafast solar and thermal energy storage based on biomorphic SiC skeletons embedded NaCl-KCl molten salts, achieving a record-high thermal conductivity through replicating cellular structure of oak wood. By decorating TiN nanoparticles on SiC skeletons, the solar absorptance is enhanced, enabling designed composites to have bifunctional capabilities of harvesting both thermal energy and solar energy very rapidly.
MATERIALS TODAY ENERGY
(2021)
Article
Energy & Fuels
Qi Chen, Hao Wang, Huabo Gao, Xinjing Wang, Bin Ma
Summary: Novel shape-stabilized silicon carbide/paraffin composite phase change materials were prepared using a vacuum impregnation method. The composite exhibited excellent thermal conductivity and good thermal storage capacity, making it a promising material for thermal energy storage.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Construction & Building Technology
Wei Huang, Jiawei Zhang, Jialai Wang, Yong Zheng, Jianhu Ma, Fanglin Ding
Summary: This study explores a novel approach to enhance thermal energy storage in building materials by incorporating phase change materials (PCMs) into concrete. While the incorporation of microcapsules significantly improved concrete's thermal properties, it also led to a reduction in compressive strength. Furthermore, the study found that larger particles of microcapsules improved thermal properties, while smaller particles enhanced mechanical properties.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Liang Wang, Yifei Wang
Summary: By using numerical calculation and simulation to study the effects of different fin thickness, fin space, and the number of ducts on the heat storage and release process of paraffin, it is found that optimized parameters can improve the performance of the paraffin regenerator, showing the significant role of heat transfer between air and paraffin. The best combination regenerator can maintain indoor heating for eight hours with its melting degree and released heat.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Construction & Building Technology
C. Gutierrez-Blandon, A. A. Cuadri, A. Tenorio-Alfonso, P. Partal, F. J. Navarro
Summary: This paper analyzes the thermomechanical properties, heat storage characteristics and compatibility of bitumen blends with a paraffin wax as phase change material. The results show partial compatibility between the blends, and the development of a multiphasic microstructure. Despite the partial compatibility, the blends exhibit a high degree of crystallinity, which makes them suitable for applications requiring thermal energy storage.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Zhonghao Lv, Jianwei Tang, Yuti Tian, Quanxian Hua, Yong Liu, Li Liu, Baoming Wang
Summary: A new microencapsulated phase-change material was prepared using an in situ precipitation method, showing good thermal stability and high encapsulation efficiency. Zinc oxide demonstrated good performance as a shell material for microencapsulated paraffin PCMs.
Article
Energy & Fuels
Subbarama Kousik Suraparaju, Arivazhagan Sampathkumar, Sendhil Kumar Natarajan
Summary: The purpose of this study is to develop a novel composite thermal energy storage system (CTESS) using blends of used cooking oil (UCO) and paraffin wax (PW) and experimentally investigate its effect on the performance of solar still for effective seawater desalination. The investigation was carried out experimentally, and the results show that the SSUCO significantly enhanced freshwater production compared to CSS. The results indicate that CTESS is a highly promising technique for seawater desalination in solar stills, providing notable advantages such as increased productivity, enhanced thermal efficiency, and significant economic and environmental benefits.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Daniel Mikkelson, J. Michael Doster
Summary: This paper presents two CTES models, namely the single-pipe network design and the dual-pipe network design, to analyze their potential applications in constant steam production. The results indicate that the single-pipe network design is suitable for batch energy applications, while the dual-pipe network design is appropriate for continuous energy applications.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Agnieszka Ochman, Wei-Qin Chen, Przemyslaw Blasiak, Michal Pomorski, Slawomir Pietrowicz
Summary: The article discusses the thermal-flow behaviors of a low-temperature Phase Change Material (PCM) used in Thermal Energy Storage (TES) applications, showing that the PCM can undergo phase change within a specific temperature range and has a high heat storage capacity. Comparison between numerical and experimental results indicates small errors during phase transitions.
Article
Energy & Fuels
T. Lucio-Martin, M. Roig-Flores, M. Izquierdo, M. C. Alonso
Summary: This study experimentally investigated the evolution of thermal conductivity of concrete at high temperatures, revealing that the initial loss of thermal conductivity during heating is mainly due to the loss of free water. Siliceous aggregates experienced the highest decrease in thermal conductivity, while the thermal conductivity partially recovered during the cooling phase.
Article
Chemistry, Physical
In Kyu Jeon, Byeong Hun Woo, Dong Ho Yoo, Jae Suk Ryou, Hong Gi Kim
Summary: The use of nano-SiO2 and MgO in underwater concrete can improve its mechanical properties and anti-washout resistance, while also affecting its rheological properties.
Article
Chemistry, Physical
Jun Suk Lee, Byeong Hun Woo, Jae-Suk Ryou, Jee-Sang Kim
Summary: High-strength concrete plays a crucial role in post-tensioned anchorage zones, with main and secondary confinement effects significantly impacting specimen stability and load-bearing capacity.
Article
Thermodynamics
Byeong Hun Woo, In Kyu Jeon, Dong Ho Yoo, Hong Gi Kim, Jae-Suk Ryou
Summary: This study evaluated the ice-melting performance of cement composites using silicon carbide as fine aggregate. The results showed that using silicon carbide can enhance the thermal properties and ice-melting performance of cement composites.
APPLIED THERMAL ENGINEERING
(2021)
Article
Engineering, Civil
Zahid Ullah, Ehsanullah Kakar, Abdul Qudoos, Atta Ur Rehman
Summary: This study investigated the effect of thermal exposure on the properties of photocatalytic cement mortars with nano-TiO2 particles replacing ordinary Portland cement. Results showed that the addition of TiO2 increased mortar resistance to thermal deterioration and preserved residual properties. Additionally, the study evaluated the photocatalytic performance of cement mortars, showing that it was unaffected up to 400 degrees C but deteriorated at higher temperatures.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Chemistry, Physical
Byeong-Hun Woo, Dong-Ho Yoo, Seong-Soo Kim, Jeong-Bae Lee, Jae-Suk Ryou, Hong-Gi Kim
Summary: In this study, silicon carbide, steel fiber, and graphite were used to enhance the thermal conductivity of concrete. Steel fiber compensated for the negative effects of graphite and improved thermal durability, while silicon carbide helped to enhance thermal durability in the same way as steel fiber. The study concluded that using 50% silicon carbide was the most effective approach, and caution should be taken when considering the content of graphite or other conductive materials in further studies.
Article
Green & Sustainable Science & Technology
Binna Lee, Byeong-Hun Woo, Jae-Suk Ryou
Summary: This study evaluates the use of recycled industrial wastes boron compounds to replace traditional boron products in mortars. The type and chemical composition of boron compounds were found to affect the physical properties and thermal neutron shielding performance of mortar, highlighting the importance of determining the optimal amount of boron compounds in mortar fabrication.
Article
Engineering, Chemical
In Kyu Jeon, Abdul Qudoos, Byeong Hun Woo, Dong Ho Yoo, Hong Gi Kim
Summary: This study investigates the mechanical, physical, microstructural, and durability-related properties of underwater concrete containing nano-silica and MgO. The results show that, at appropriate dosage, the incorporation of nano-silica and MgO improves the compressive strength and resistance to carbonation and chloride penetration of the concrete.
Article
Green & Sustainable Science & Technology
Byeong Hun Woo, Jeong Bae Lee, Hyunseok Lee, Hong Gi Kim
Summary: This study used the Monte Carlo simulation method to reflect the substituting ratio of fine aggregate in an aggregate simulation. The chosen distributions (Cauchy and log-normal) were mixed and applied, resulting in a simulated particle distribution that closely resembled the real particle distribution.
Article
Engineering, Multidisciplinary
Byeong-Hun Woo, Dong-Ho Yoo, In-Kyu Jeon, Jee-Sang Kim, Kyung-Suk Yoo, Hong Gi Kim
Summary: In this study, an equation for predicting the thermal conductivity of cement composites was proposed and estimated using Gaussian process regression. The application of experimental data resulted in highly accurate predictions, demonstrating its effectiveness in existing research.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Anand Parkash, Hira Lal Soni, Tahir Hussain Seehar, Rimsha Larik, Syed Haseeb Sultan, Abdul Qudoos, Adeel Mukhtar Arain
Summary: Pyrolysis of metal-organic framework (MOF) is a potential approach for creating nanostructured carbon-based materials. This study explores the development of cobalt-based MOF (Co-MOF-74) and its application to oxygen electrocatalysis. The results show that the obtained Co-PC-400 catalyst exhibits superior catalytic performance in alkaline media and has great potential in fuel cell applications.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Construction & Building Technology
Jae-Hyun Bae, Byeong Hun Woo, Hong Gi Kim, Jae-Suk Ryou
Summary: In this study, the use of copper powder as a substitute for fine aggregate in cement mortar was investigated. The effects of copper powder on ice-melting performance and thermal properties were analyzed. It was found that adding 10% copper powder resulted in the most efficient ice-melting performance and improvement in thermal properties. Furthermore, the addition of copper powder affected the porosity of the mortar, with higher amounts causing agglomeration effects. The incorporation of 10% copper powder also resulted in the highest compressive and flexural strength.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
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
Construction & Building Technology
Byeong-Hun Woo, Jeong-Bae Lee, Jee-Sang Kim, Hong Gi Kim
Summary: Corrosion assessment technology is improved with a focus on sensing technologies to detect and respond to rebar corrosion without removing concrete. This study used Bayes inference to evaluate rebar corrosion status based on voltage potential data. The non-corroded rebar probability distribution was determined using Bayes inference, and the corrosion state was assessed using the posterior distribution derived from the fitted distribution. The results show that the Bayesian method can assess rebar corrosion state conservatively.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Kyeong Woo Kim, Kyu Tae Park, Fatmanur Ates, Hong Gi Kim, Byeong-Hun Woo
Summary: With the reduction of CO2 emissions set as an international goal, the use of biomass is increasing. However, dealing with the large amount of ash generated after using biomass is an important issue. Some biomass fly ash has similar chemical composition to C-class fly ash, making it suitable as supplementary cementitious materials. However, due to its high porosity and unburned particles, it is not a complete alternative material for cement.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
