Article
Engineering, Biomedical
Petr Dohnalik, Bernhard L. A. Pichler, Luis Zelaya-Lainez, Olaf Lahayne, Gilles Richard, Christian Hellmich
Summary: Biodentine is a dental replacement biomaterial with superior properties compared to similar construction cement pastes. The micromechanical investigation revealed three different material phases contributing to the overall elastic properties of the cement paste material, with the majority belonging to highly dense calcite-reinforced hydration products. The presence of micro-defects weakened the otherwise optimized biomaterial system, as indicated by ultrasonic tests performed.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Construction & Building Technology
Prodip Kumar Sarkar, Nilanjan Mitra
Summary: This study investigated the influence of macro-pores filled with air and/or water on the thermal conductivity of cement paste, using a combination of experiments, molecular dynamic investigations, multiscale homogenization techniques, and consideration of thermal conductivity of the pores. The presence of these pores was found to significantly alter the thermal conductivity of the composite material.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Environmental Sciences
Nihan Gulmez
Summary: This study investigates the substitution effects of marble powder and iron particles in concrete. The results show that the 28-day concrete mixture with 10% marble powder and 20% iron waste exhibits the best physical and mechanical performance, and the capillary water absorption is improved with the substitution of marble powder.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Crystallography
Tongkuai Wang, Wenwei Yang, Jintuan Zhang
Summary: The utilization of waste stone powder is an important step towards sustainable development. This paper investigates the impact of particle size and replacement cement dosage of marble waste powder on the mechanical properties of cementitious materials. SEM and XRD are used to evaluate the microstructure and mineral characterization. The results show that the early strength of cementitious materials significantly improves when the dosage of marble waste powder is between 0-15%. The lifting effect of marble waste powder with a particle size of 600 mesh on the strength and microstructure of cementitious materials is the most significant. Different particle sizes of marble waste powder have low chemical activity but participate in the hydration reaction of cement to a lesser extent. Smaller particle sizes of marble waste powder result in denser early microstructure, more obvious nucleation phenomena, and more severe particle agglomeration. The paper also proposes a mechanism model for marble waste powder replacing cement in cementitious materials and constructs a strength prediction function model between material dosage and compressive strength, which has been verified for accuracy.
Article
Materials Science, Multidisciplinary
Yasin Onuralp Ozkilic, Ozer Zeybek, Alireza Bahrami, Ali Ihsan Celik, Md Azree Othuman Mydin, Memduh Karalar, Ibrahim Y. Hakeem, Krishanu Roy, P. Jagadesh
Summary: In this study, waste marble powder (WMP) was used to replace cement in concrete, and the effects of different replacement ratios on the mechanical properties were investigated. The results showed that moderate replacement of WMP can achieve optimum benefits in terms of both engineering and environmental aspects. Furthermore, the interaction of WMP in concrete was observed through SEM and EDX analyses.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Green & Sustainable Science & Technology
Yuanbo Du, Wencui Yang, Yong Ge, Sha Wang, Penghuan Liu
Summary: The study found that adding metakaolin increased thermal conductivity in cement paste, while adding waste glass powder and limestone filler decreased thermal conductivity. Cement paste containing metakaolin exhibited lower porosity and higher compressive and flexural strength.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Guosheng Zhang, Qiang Wang, Yue Li, Mingzhong Zhang
Summary: This study systematically investigates the evolution of phase composition, microstructure, and micro-mechanical properties of magnesium phosphate cement (MPC) and their influence on macroscopic mechanical properties. The microstructure of MPC is primarily composed of potassium magnesium phosphate hexahydrate (MKP) crystals and a hybrid region of magnesium oxide and amorphous hydration products. The elastic modulus and hardness of MKP crystals are 20.18 GPa and 1.15 GPa, respectively. The macroscopic strength of MPC is mainly determined by its pore structure rather than the micro-mechanical properties of hydration products.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Construction & Building Technology
Huixia Wu, Chaofeng Liang, Jianzhuang Xiao, Zhiming Ma
Summary: Recycling hardened cement paste powder (HCPP) as an alternative binder is an efficient way to reduce waste, but it can lead to increased drying shrinkage and reduced mechanical strength and transport properties in mortar. Original hardened cement pastes with low water/cement ratios or containing supplementary cementitious materials (SCMs) can enhance the properties of preparing HCPP and its mortar. Additionally, CO2-curing treatment on HCPP is crucial for improving the properties of its prepared cement-based materials.
JOURNAL OF BUILDING ENGINEERING
(2021)
Review
Environmental Sciences
Sajjad Ali Mangi, Muhammad Saleem Raza, Shabir Hussain Khahro, Abdul Sami Qureshi, Rabinder Kumar
Summary: Currently, the recycling of waste materials in construction is highly important for ensuring sustainable infrastructure development and mitigating environmental degradation caused by waste generation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Construction & Building Technology
Lei Jiang, Qian Wu, Qifan Gu, Dongqing Zhong, Luming Wang
Summary: Utilization of waste concrete through CO2 curing is a promising strategy for sustainable development. This study investigates the properties and microstructure of cement mortar with CO2-cured waste cement powder (CWCP). The results show that CWCP undergoes changes in pH value and carbonation, and the addition of CWCP affects the flowability and compressive strength of the cement mortar.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Chemistry, Physical
Fengming Ren, Xiwen Zhang, Mingxin Lin, Qing Wang, Jing Sun
Summary: Waste glass powder (WGP) can be acquired from glass bottles and has the potential to improve the rheological performance and strength development of cementitious composites. The addition of WGP reduces carbon dioxide emissions from cement, indicating a positive outlook for its utilization in the cement industry.
Review
Construction & Building Technology
Bhaskar Prakash, T. Jothi Saravanan, K. I. Syed Ahmed Kabeer, Kunal Bisht
Summary: Stone and marble processing industries are important for economic development, but their waste poses environmental concerns. The concrete industry is seeking eco-friendly alternatives to cement, and this study explores the use of waste marble powder in cement-based composites. The study examines various properties and finds that the inclusion of WMP can improve workability, compressive strength, chloride resistance, and durability performance, especially when combined with other cement additives.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Environmental Sciences
Haibo Hu, Wu Yao, Yongqi Wei
Summary: This study investigates the utilization of waste dolomite powder (WDP) in the preparation of eco-friendly cement-based material. The results show that adding WDP accelerates the early hydration process of cement, resulting in shortened setting time and improved early compressive strength. WDP also improves the microstructure and pore characteristics of cement paste, while reducing energy consumption, CO2 emissions, and economic costs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Construction & Building Technology
Ahmed Essam, Sahar A. Mostafa, Mehran Khan, Ahmed M. Tahwia
Summary: This study explores the potential of utilizing waste marble powder (WMP) instead of cement to develop environmentally friendly high-performance concrete (Eco-HPC). It optimizes the mixture ratios and predicts the mechanical properties and water absorption of Eco-HPC blends using particle packing models and artificial neural networks. The results show that substituting cement with WMP leads to denser microstructures and improved mechanical properties.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Oguzhan Yavuz Bayraktar, Gokhan Yarar, Ahmet Benli, Gokhan Kaplan, Osman Gencel, Mucahit Sutcu, Marcin Kozlowski, Marta Kadela
Summary: Foam concrete, as a typical lightweight material, has advantages such as lightweight, high fluidity, excellent thermal insulation, fire resistance, and energy absorption capacity. However, its high porosity leads to poor physico-mechanical and durability performance. This study improved foam concrete by incorporating eco-friendly fiber (basalt fibers) and aluminous cement (calcium aluminate cement) with aggregates of waste marble powder. The experimental results showed that the modified foam concrete exhibited enhanced compressive strength, low thermal conductivity, and improved resistance against magnesium sulfate and hydrochloric acid.
STRUCTURAL CONCRETE
(2023)
Article
Engineering, Civil
R. Hluzek, J. Trejbal, V. Nezerka, P. Demo, Z. Prosek, P. Tesarek
Summary: Poor adhesion between synthetic macro fibers and cementitious matrix limits the reinforcing capacity of fiber-reinforced cementitious composites (FRCCs). Various strategies have been used to improve bonding, but most of them deteriorate fiber properties. Plasma treatment of fibers and strengthening the fiber-matrix interface using recycled concrete powder (RCP) have shown positive results at a single fiber scale, but the results may not be easily scaled and random fiber orientation can negatively influence the tension-softening behavior of FRCCs.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Construction & Building Technology
J. Valentin, J. Trejbal, V Nezerka, T. Valentova, M. Faltus
Summary: The research found that the effects of blast furnace slag or recycled concrete are superior to some conventional fillers, and mixing quarry dusts with portland cement or talc is beneficial for making originally hydrophilic dusts more hydrophobic.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Mechanical
V Nezerka, P. Havlasek
Summary: This paper introduces a lightweight approach based on DFT for handling displacements in large sets of images and describes an open-source Python software for evaluating displacements. The study shows that this algorithm outperforms traditional DIC packages in terms of computational efficiency and user interactions, without compromising precision and accuracy.
EXPERIMENTAL TECHNIQUES
(2022)
Article
Construction & Building Technology
J. Valentin, J. Trejbal, V Nezerka, T. Valentova, P. Vackova, P. Ticha
Summary: This study evaluated the impact of different adhesion promoters on asphalt concrete using multiple experimental methods, revealing that the performance of additives cannot be fully assessed based on a single test result. The study also found a correlation between bituminous binder adhesion to aggregates, fracture-mechanical properties of asphalt concretes, and their susceptibility to deterioration in mechanical properties. The results suggest that silane-based adhesion promoter shows the most promise for increasing resistance to stripping in asphalt concrete pavements.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
V Nezerka, P. Demo, H. Schreiberova, P. Ryparova, P. Bily
Summary: Despite limited knowledge on bacterial proliferation in concretes for self-healing, efforts are being made to standardize the technology. Mathematical models, like Monod's model, can potentially assist in designing self-healing composites and harnessing bacterially-induced calcite precipitation more efficiently. The study using Bacillus pseudofirmus contributes to understanding bacterial growth and its proliferation characteristics.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Robotics
Martin Jilek, Michael Somr, Miroslav Kulich, Jan Zeman, Libor Preucil
Summary: The research introduces a framework for designing macroscale passive robots capable of targeted self-assembly, utilizing properly designed magneto-mechanical locks for jamming-free assembly, dedicated encoding of glues for guiding tile interactions, and consistent formalization of geometrical constraints to ensure valid assembly.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2021)
Article
Construction & Building Technology
Z. Prosek, V. Nezerka, T. Plachy, M. Bartos, P. Tesarek
Summary: Different strains of bacteria capable of calcite precipitation can be incorporated into fresh concrete or cement mortars to efficiently promote self-healing of microcracks after hardening. Poly(vinyl alcohol) (PVA) doped with spores of Bacillus pseudofirmus and nutrients were added to mixing water when cementitious mortars were prepared. PVA was efficient in promoting remediation in all mortar specimens, both with and without bacteria.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Chemistry, Multidisciplinary
Petr Svora, Sylwia Svorova Pawelkowicz, Petra Ecorchard, Jiri Plocek, Alena Schieberova, Zdenek Prosek, Petr Ptacek, Jan Posta, Piotr Targowski, Petr Kuklik, Ivo Jakubec
Summary: This study investigates the protection of wood against photodegradation by titanium dioxide (TiO2) coating and finds that TiO2 coating can provide limited protection against photodegradation.
Article
Crystallography
Pavel Demo, Filip Preucil, Zdenek Prosek, Petra Ticha, Maria Domonkos
Summary: This paper presents theoretically oriented research on the application of specific bacteria capable of transforming available nutrients into calcite for the self-healing of cementitious materials. The sensitivity of bacterial growth curves to system parameters was analyzed using the logistic model in the Monod approach.
Article
Green & Sustainable Science & Technology
V. Nezerka, Z. Prosek, J. Trejbal, J. Pesta, J. A. Ferriz-Papi, P. Tesarek
Summary: A significant amount of research has focused on finding suitable waste materials or industrial by-products to replace portland cement in the concrete industry in order to reduce its environmental impact. However, many studies have neglected to assess the environmental impacts associated with using these alternative materials and their contribution to the sustainability of the sector remains unclear. This paper presents the development of lightweight blocks using waste concrete and evaluates their structural and environmental performance. The results show that this recycling strategy is feasible and offers environmental benefits, but the carbon footprint of the lightweight blocks is still significant. To significantly reduce CO2 emissions in the construction sector, holistic measures promoting the reuse of whole building elements are needed instead of disintegration and subsequent recycling.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Biotechnology & Applied Microbiology
V. Nezerka, P. Holecek, M. Somr, P. Ticha, M. Domonkos, H. Stiborova
Summary: Introducing circular economy principles into the concrete industry would enhance its sustainability. Recycling strategies for concrete waste are inefficient in dealing with waste concrete fines, but harnessing bacteria to bond them into construction material shows promise. Extensive research on bacterial metabolic pathways for calcite precipitation and their environmental impacts is critical for overcoming obstacles in this technology. Alternative approaches, such as using by-products from other industries or different metabolic pathways, need to be explored to reduce negative environmental effects.
REVIEWS IN ENVIRONMENTAL SCIENCE AND BIO-TECHNOLOGY
(2023)
Article
Computer Science, Artificial Intelligence
V Nezerka, T. Zbiral, J. Trejbal
Summary: Improper sorting of construction and demolition waste (CDW) can have significant environmental and economic implications. In this study, a machine-learning-assisted procedure using an RGB camera was developed to recognize CDW fragments. The approach used selected feature extraction to enhance classification speed and accuracy. Three classifiers were employed, and the method's extraction of selected features outperformed traditional methods, especially for challenging samples. The findings of this study have important implications for CDW management, providing a pathway for efficient waste sorting and reducing environmental impact.
EXPERT SYSTEMS WITH APPLICATIONS
(2024)
Proceedings Paper
Green & Sustainable Science & Technology
Jan Valentin, Majda Belhaj, Pavla Vackova, Vaclav Nezerka, Jan Trejbal
Summary: This research study investigates the potential use of selected fillers as substitutes for limestone filler in asphalt mixes. The chemical composition and physical properties of these fillers are analyzed to understand their influence on asphalt mortar quality, stiffness, and resistance to water immersion. The findings indicate that the fillers' properties play a crucial role in the durability and resistance to permanent deformation and moisture susceptibility of asphalt mix.
CIGOS 2021, EMERGING TECHNOLOGIES AND APPLICATIONS FOR GREEN INFRASTRUCTURE
(2022)
Proceedings Paper
Construction & Building Technology
Pavel Tesarek, Ondrej Zobal, Tereza Horova, Zdenek Prosek
SPECIAL CONCRETE AND COMPOSITES 2019
(2020)
Proceedings Paper
Materials Science, Multidisciplinary
P. Ryparova, P. Tesarek, H. Schreiberova, Z. Prosek
DEVELOPMENT OF MATERIALS SCIENCE IN RESEARCH AND EDUCATION (DMSRE29)
(2020)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)
