Article
Environmental Sciences
Xiao-Yong Wang
Summary: This study presents an analysis model of CO2 uptake of slag-blended concrete considering the service stage and the recycling stage. The analysis results show that the total CO2 uptake ratio increases with an increase in slag replacement ratio and water-to-binder ratio. Structural elements, concrete component shape, and crushed concrete diameter can impact the rate of CO2 uptake, but do not affect the total CO2 uptake ratio.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Construction & Building Technology
Senthil Kumar Kaliyavaradhan, Lufan Li, Tung-Chai Ling
Summary: The novelty of this study lies in the investigation of CO2 uptake capabilities of waste concrete powder (WCP) from construction and demolition waste recycling plants. By using the response surface methodology (RSM), the optimal conditions for maximizing the CO2 uptake through mineral carbonation of WCP were determined. The results showed that at a carbonation time of 90 hours and a water-to-solid ratio of 0.4, the CO2 uptake of WCP was 2.81%. The study also evaluated the physical and chemical changes in WCP after carbonation and its leaching performance of heavy metals, demonstrating the feasibility of using carbonated WCP as supplementary cementitious material for CO2 sequestration.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Zhimin He, Xuyang Shao, Xin Chen
Summary: This study investigates the strength and carbonation degree of a composite cementitious material system consisting of high-content steel slag powder, cement, and metakaolin under CO2 curing conditions. The results show that CO2 curing significantly improves the early strength and carbonation area of the specimens. Microscopic analysis reveals the chemical mechanisms involved in the hydration reactivity and cementitious properties.
Article
Engineering, Chemical
Hegazy Rezk, Ali Alahmer, Rania M. Ghoniem, Samer As'ad
Summary: This study explores the application of artificial intelligence and the Marine Predators Algorithm in maximizing CO2 absorption from waste concrete powder. The study utilizes the adaptive neuro-fuzzy inference system model and optimization algorithm, resulting in improved modeling accuracy and CO2 uptake.
Article
Geosciences, Multidisciplinary
Rui Guo, Jiaoyue Wang, Longfei Bing, Dan Tong, Philippe Ciais, Steven J. Davis, Robbie M. Andrew, Fengming Xi, Zhu Liu
Summary: Because of the alkaline nature and high calcium content of cements, they can serve as a CO2-absorbing agent and reduce emissions during production. A life-cycle assessment is necessary to determine the actual net carbon impacts of the cement industry. Mortar is estimated to be the greatest contributor to the total carbon uptake among four types of cement materials.
EARTH SYSTEM SCIENCE DATA
(2021)
Article
Construction & Building Technology
Lixi Liu, Yilun Liu, Xiaogeng Tian, Xi Chen
Summary: The utilization of flue gas for carbonation curing shows superior CO2 uptake and compressive strength compared to pure CO2, providing new pathways for carbonation management. The mechanism, characteristics, and feasibility of flue gas carbonation curing are discussed.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiaotong Ma, Xingkang Huang, Tai Feng, Mingfei Mu, Xiude Hu
Summary: CaO-based materials are effective sorbents for removing HCl and CO2, with HCl having a preference for interacting with surface oxygen atoms on the CaO (100) surface. The adsorption energy per HCl decreases as repulsion between HCl molecules increases with rising coverage, indicating a competing adsorption behavior with CO2. The presence of HCl inhibits CO2 adsorption and promotes CO2 desorption by lowering the absorption energy and reaction barrier in the HCl/CaO system compared to pristine CaO (100).
REACTION CHEMISTRY & ENGINEERING
(2022)
Article
Construction & Building Technology
Lixi Liu, Yilun Liu, Xiaogeng Tian, Xi Chen
Summary: This study demonstrates that carbonation curing using flue gas can lead to higher CO2 uptake and compressive strength compared to pure CO2 curing. The rate of flue gas carbonation is slower at the beginning, but the CO2 uptake and compressive strength are higher than pure CO2 after 12 hours of carbonation. Furthermore, by properly combining carbonation and hydration curing, the 28-day strength of flue gas carbonated specimens can exceed that of hydration specimens.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Environmental Sciences
Qiusong Chen, Liming Zhu, Yunmin Wang, Jie Chen, Chongchong Qi
Summary: This study investigated the carbon-uptake characteristics and mechanical property of CPB in underground mined-out stopes. The results showed that the carbonation rate increased significantly with carbonation curing, and each ton of CPB could absorb about 78.4 kg CO2. CC affected the strength development and improved the pore structure of CPB.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Construction & Building Technology
Debora Berti, Giovanna Biscontin, Jeffrey Lau
Summary: Laboratory tests have shown that adding biochar filler to portland cement stabilized peat can result in a significant increase in unconfined compressive strength, comparable to that of a sand filler. When the biochar is ground to a size below 75 μm, the strength increase is even higher. The study investigated changes in mineralogy, texture, and microstructure during the early hydration process of cement mixed with peat and biochar fillers, aiming to identify the mechanisms behind the strength improvement. The results indicate that the biochar surface catalyzes the nucleation of hydration products, promoting carbonation and the formation of stable phases that contribute to the overall strength enhancement.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Thermodynamics
Sanoop Kumar Puthiya Veetil, Kaarel Rebane, Can Rustu Yoruk, Margus Lopp, Andres Trikkel, Michael Hitch
Summary: The study evaluated the development of a Ca-based CO2 capture sorbent from a limestone-rich mine waste via aqueous mineral carbonation. It was found that optimal dissolution and carbonation of calcium occurred at 2.5% pulp density, resulting in the production of pure calcite during the process. The promising CO2 uptake capacity of the developed sorbent suggests its potential for direct CO2 capture.
Article
Construction & Building Technology
Ekaterina Kravchenko, Chuhao Qin, Zhenzhen Lin, Charles Wang Wai Ng
Summary: Treating steel slag with an environmentally friendly solution of polyvinyl alcohol (PVA) can increase its carbon sequestration capacity, making it a potential solution to reduce global greenhouse gas emissions produced by the construction industry.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Mingjing Ma, Rui Guo, Longfei Bing, Jiaoyue Wang, Yan Yin, Wenfeng Zhang, Le Niu, Zhu Liu, Fengming Xi
Summary: About two-thirds of global CO2 emissions from the energy and industry sectors are generated in China, accounting for approximately 30% of total global CO2 emissions. These carbon-intensive processes usually produce a large amount of alkaline solid wastes, which have shown great potential to serve as CO2 absorbers. This research estimated the CO2 uptake of 7 types of alkaline solid wastes produced in China between 1930 and 2020 and found that cumulatively, 1099.51 Mt CO2 had been sequestered by natural carbonation. The results indicate that the natural carbonation of such waste can reduce the carbon footprint of the corresponding industrial and agroforestry processes.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Marina Lopez-Arias, Carlos Moro, Vito Francioso, Husam H. Elgaali, Mirian Velay-Lizancos
Summary: This study investigates the effect of nano-TiO2 addition on the CO2 uptake rate of cement pastes and shows that it enhances the rate, enabling a more efficient capture of CO2.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Munique Fante, Francisco Roger Carneiro Ribeiro, David Brandao Nunes, Regina Celia Espinosa Modolo, Claudio de Souza Kazmierczak, Mauricio Mancio, Francisco Manoel Wohnrath Tognoli, Afonso Rangel Garcez de Azevedo, Marlova Piva Kulakowski
Summary: This study evaluated the physical and chemical effects of calcium carbonate limestone filler in mortar pastes subjected to accelerated carbonation. Results showed that a 25% filler substitution at a water/cement ratio of 0.42 achieved the best performance in terms of compression strength and water absorption. Carbonation primarily affected by the water/cement ratio rather than substitution level, consuming portlandite and forming calcite. Further studies identified additional calcium carbonate polymorphs after 28 days of accelerated carbonation.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Run-Sheng Lin, Han-Seung Lee, Yi Han, Xiao-Yong Wang
Summary: This study presents multiple experimental studies on the hydration, strength, and durability properties of ternary or binary composites incorporating calcined Hwangtoh clay and limestone powder. The experimental results indicate that the ternary composite with a 15% replacement level provides the most optimal mixture, and a 30% replacement level is the threshold level for achieving a similar strength as plain concrete. The study also shows a linear relationship between strength and combined water, as well as the synergic relation between calcined clay and limestone in the ternary composite.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Xiao-Yong Wang
Summary: This study presents a framework for evaluating the hydration heat, reaction amount, and strength progress of cement-slag binary composites. Experimental results show that the reaction amount of slag is significantly improved at elevated temperatures.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Xiao-Yong Wang, Seokhee Lee, Hyeongkyu Cho
Summary: Previous studies mainly focused on the anti-corrosion performance of corrosion inhibitors, with limited research on the construction technology of applying corrosion inhibitors to hardened concrete. An experiment injecting corrosion inhibitors into concrete under high pressure was conducted, revealing that the water-cement ratio significantly influences the inhibitor and proposing a predictive equation for inhibitor penetration. Pressure and pressurizing time were crucial factors in measuring nitrite ion concentration in concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Environmental Sciences
Xiao-Yong Wang
Summary: This study presents an analysis model of CO2 uptake of slag-blended concrete considering the service stage and the recycling stage. The analysis results show that the total CO2 uptake ratio increases with an increase in slag replacement ratio and water-to-binder ratio. Structural elements, concrete component shape, and crushed concrete diameter can impact the rate of CO2 uptake, but do not affect the total CO2 uptake ratio.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Mei-Yu Xuan, Yi-Sheng Wang, Xiao-Yong Wang, Han-Seung Lee, Seung-Jun Kwon
Summary: The study found that a small amount of SAP can promote strength in the first 3 days, while BPC significantly improves strength over the following 28 days. SAP slows down internal relative humidity reduction and reduces AS development, while BPC shows lower AS compared to other specimens.
Article
Chemistry, Physical
Xu Yang, Run-Sheng Lin, Yi Han, Xiao-Yong Wang
Summary: The study found that adding biochar can reduce cracks, increase compressive strength, and compensate for the decrease in ultrasonic pulse velocity of cement paste exposed to high temperatures.
Article
Polymer Science
Gui-Yu Zhang, Yong-Han Ahn, Run-Sheng Lin, Xiao-Yong Wang
Summary: The study indicates that mixing waste ceramic powder with blast furnace slag (BFS) and using it in alkali-activated paste and mortar can improve fluidity, enhance resistance to sulfuric acid, and increase chloride ion diffusion. Additionally, early strength is influenced by the Ca/Si ratio, while later strength is affected by the Si/Al ratio.
Article
Chemistry, Multidisciplinary
Ki-Bong Park, Yi-Sheng Wang, Xiao-Yong Wang
Summary: The study presents a procedure to analyze the property development of slag composite concrete through experimental and simulation studies. Experimental results show a decrease in slag reactivity with increasing slag content. The integrated kinetic-thermodynamic model is helpful in analyzing the properties of cement-slag blends.
APPLIED SCIENCES-BASEL
(2021)
Article
Polymer Science
Gui-Yu Zhang, Sung-Chul Bae, Run-Sheng Lin, Xiao-Yong Wang
Summary: The study demonstrates that adding waste ceramic powder can enhance the mechanical properties of alkali-activated blast furnace slag and fly ash paste at high temperatures, increasing compressive strength, reducing weight loss, and improving microstructural density.
Article
Chemistry, Physical
Gui-Yu Zhang, Sihwan Lee, Yi Han, Xiao-Yong Wang
Summary: The aim of this study is to evaluate the high-temperature resistance of alkali-activated slag ceramic powder mixture with added oyster shell powder (OSP) at different temperatures, address the lack of environmentally friendly building materials, and reduce solid waste pollution. The results show that adding OSP can effectively reduce the damage of high temperatures on the properties of alkali-activated binders.
Editorial Material
Chemistry, Physical
Gui-Yu Zhang, Xiao-Yong Wang
Article
Construction & Building Technology
Xiao-Yong Wang, Yi-Sheng Wang, Run-Sheng Lin, Hyeong-Kyu Cho, Tae-Beom Min
Summary: This research presents a genetic algorithm-based process for optimizing the design of sustainable concrete with limestone powder. The objective is to minimize embodied energy while considering restraints such as strength, workability, carbonation resistance, and stress. The study reveals that for low-strength concrete, carbonation plays a dominant role in the mixture design, while for high-strength concrete, strength is the critical factor. Additionally, the research demonstrates the overlap between low carbon footprint and low embodied energy mixtures.
Article
Chemistry, Physical
Yi Han, Seokhoon Oh, Xiao-Yong Wang, Run-Sheng Lin
Summary: This study addresses the urgent problem of reducing carbon emissions in the cement industry. The use of mineral admixtures with different compositions was investigated, and their effects on the properties of cement pastes were studied. The results show that alternative materials can promote cement hydration and improve compressive strength, and the quaternary-blended paste exhibits excellent durability and sustainability.
Article
Construction & Building Technology
Xiao-Yong Wang, Han-Seung Lee
Summary: The study presents an optimization process for air-entrained slag blended concrete, considering carbonation durability, frost durability, CO2 emission, and materials cost. A genetic algorithm is used to determine optimal mixtures based on various constraints. The results show that carbonization is a key factor in the design of concrete mixtures under climate change.
ADVANCES IN CONCRETE CONSTRUCTION
(2021)
Article
Construction & Building Technology
Jawad Ahmad, Zhiguang Zhou
Summary: The addition of steel fibers and marble waste has a positive impact on the performance of self-compacting concrete (SCC) in aggressive environments, improving its mechanical properties, durability, and microstructure.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Kyungjae Lee, Hyunwoo Lim
Summary: Building energy code updates induce correlations among building parameters, which can affect data analysis. This study investigates the impact of these correlations through sensitivity analysis and Principal Component Analysis (PCA).
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
M. I. Nizovtsev, A. N. Sterlyagov
Summary: The effect of adding a layer of phase change material on the thermal inertia properties of the outer wall in lightweight building was numerically studied. It was found that in the regime of indoor air conditioning, adding a layer of paraffin in a foamed polyurethane wall can significantly reduce heat flux fluctuations on the inner wall surface. Additionally, locating the phase change material on the inner surface of the wall in the regime of daily in-phase fluctuations in the indoor and outdoor air temperatures produces the best effect.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Mingzhen Wang, Eric Hu, Lei Chen
Summary: This study proposes an innovative and sustainable condenser-cooling approach called Radiation-enhanced Thermal Diode Tank (RTDT) to assist in energy-saving for Refrigeration and Air-conditioning (RAC) systems. The research finds that the RTDT-RAC system can save up to 40% energy compared to the reference RAC system, with a higher Coefficient of Performance (COP) of 5.34. Additionally, the parametric analysis shows that regions with larger day and night ambient temperature differences, higher room temperature setpoints, and increased RHP radiative surface areas can effectively increase energy savings.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Hua Zhang, Xinyue Liu, Linjian Ma, Zeng Li
Summary: This study aims to investigate the impact of polypropylene (PP) fibers and aggregate contents on the mechanical performance of coral aggregate concrete (CASC). The results revealed that increasing the PP fiber contents and gravel replacement ratio significantly improved the dynamic compressive strength and toughness of CASC, while excessive fiber can have a detrimental effect. The study also developed a dynamic constitutive model that accurately predicted the stress-strain curve and mechanical properties of CASC.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Navid Moghaddas-Zadeh, Mahmood Farzaneh-Gord, William P. Bahnfleth
Summary: This study presents a general procedure for designing a hybrid chiller network using a Particle Swarm Optimization algorithm to determine the optimal configuration and chiller loading distribution. Life cycle cost analysis is used to select the optimal configuration. Simulations show that the best energy and economic choices depend on the natural gas and electricity price ratio.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Carolina Briceno, Miguel Azenha, Graca Vasconcelos, Paulo B. Lourenco
Summary: The conditioning of the brick units has an influence on the shear bond behavior of the unit-mortar interface. Longer immersion time improves the shear bond properties, while the cohesion values of premixed mortars are affected by the conditioning time.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Seong-Yong Cheon, Hye-Jin Cho, Jae-Weon Jeong
Summary: A dedicated outdoor air system (DOAS) assisted by an isothermal dehumidifier and an indirect evaporative cooler is proposed, and its energy-saving potential is evaluated based on detailed simulations. The results indicate that despite the free cooling operation by the indirect evaporative cooler, the proposed system consumes 10% more operating energy due to the low coefficient of performance (COP) of the isothermal dehumidifier. Improvements in the COP of the isothermal dehumidifier are required for comparable energy performance.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Xiaochen Ma, Wenchao Shi, Hongxing Yang
Summary: The actual wetting factor of the plate surface and the movement of spray droplets are important factors in the performance of indirect evaporative cooling (IEC) systems. A 3D computational fluid dynamics (CFD) model that considers these factors is proposed in this study. The model accurately predicts the performance of IEC systems and provides insights for further improvement.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Panagiota Theodoropoulou, Eleonora Brembilla, Roel Schipper, Christian Louter
Summary: This study develops an optimized glare-based control strategy for Venetian blinds in real-life buildings, aiming to improve visual conditions while saving energy. The results show that the optimized algorithm can significantly improve visual conditions for different activities in the building, although it may increase the use of electric lighting in certain cases.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Nari Yoon, Leslie Norford, Michael Wetter, Ali Malkawi
Summary: This study developed an analytical model for window operation schedules that leverages natural ventilation for different airflow rates, thermal masses, and climate variations. The research demonstrated that proper window scheduling can significantly reduce indoor temperature and save energy.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Haoran Cheng, Denghu Jing
Summary: This study investigated the reinforcement and compressive behavior of rat-trap bond walls using steel plate frames. The results showed that the steel plate frame effectively enhanced the compressive peak load of the wall, and increasing the steel plate thickness improved compressive strength and confinement effect. Nonlinear relations were observed between the preload ratio and the peak load, and local buckling of the steel plate frame was affected by the preload ratio. Finite element models were used to verify the experimental results, and calculation formulas for predicting the compressive peak load were developed and found to be accurate.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Bangyu Cheng, Jinlong Yang, Yucheng Fan, Zhi Ni, Ziyan Hang, Bowen Zeng, Huanxun Liu, Chuang Feng
Summary: This study investigates the property-microstructure relationships in graphene nanoplatelet (GNP) reinforced cement composites (GNPRCCs) using three-dimensional finite element modeling and experiments. The results reveal that GNPs aligned at 45 degrees have the most significant impact on enhancing load-bearing capacity and damage resistance of the composites. A larger GNP diameter-to-thickness ratio is beneficial for crack bridging and propagation control. The orientation and porosity of pores have significant effects on the damage behaviors of the composites, while pore shape shows negligible effects. These findings provide key guidelines for optimizing microstructural features and improving the performance and durability of construction materials.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Patrick N. Lemougna, Arnold Ismailov, Erkki Levanen, Pekka Tanskanen, Juho Yliniemi, Katja Kilpimaa, Mirja Illikainen
Summary: This study investigates the effect of glass wool waste on the sintering properties of kaolinitic and illitic clays in the ceramic industry. It was found that the addition of glass wool increased compressive strength at lower temperatures, while the addition of spodumene tailings mitigated firing shrinkage at higher temperatures.
JOURNAL OF BUILDING ENGINEERING
(2024)
Article
Construction & Building Technology
Duidi Wu, Shuangdui Wu, Qianyou Zhao, Shuo Zhang, Jin Qi, Jie Hu, Borong Lin
Summary: This study proposes an intelligent elevator information system (IEIS) based on computer vision technology, which monitors elevator occupancy and guides demand-driven operation optimization to achieve energy-efficient management and efficient operation.
JOURNAL OF BUILDING ENGINEERING
(2024)