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FRASSON, Bruna J. (author), CHERIAF, Malik (author), ROCHA, Janaíde C. (author)Addition of Portland cement in low-calcium aluminosilicate-based alkali-activated materials can provide rapid hardening at room temperature, thus modifying microstructure and mechanical properties. In the present study, the effect of Portland cement addition on alkali-activated materials, cured at room temperature, was analysed by mechanical...conference paper 2021
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Krishnya, S. (author), Yoda, Y. (author), Elakneswaran, Y. (author)Mechanical properties of cement paste are indispensable and frequent requirement in structural analysis of concrete and other cement-based materials, and therefore the theoretical predictions have obtained considerable attention in the field of material engineering. Despite of being an active research area, available models for accurately...conference paper 2021
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De Maeijer, Patricia Kara (author), Craeye, Bart (author), Kazemi-Kamyab, Hadi (author), Snellings, Ruben (author), Loots, Michel (author)In the present study, a proprietary 0.2 tonne/h Dusty Cloud Separation (DCS) technology prototype by Value Ash Technologies NV (Belgium) was used to obtain ultra-fine fly ash as a novel by-product. Two types of Class F fly ash were used: separated fly ash (FA1) with particle size < 9.3 μm and ultra-fine fly ash (FA2) < 4.6 μm as sub-fraction of...conference paper 2021
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Ishikawara, Kotaro (author), Miyamoto, Shintaro (author), Hayashi, Kensuke (author), Minagawa, Hiroshi (author), Hisada, Makoto (author)The purpose of this study is to clarify the performance of cement hardenings containing clinkers which are utilized as aggregate by evaluating the compressive strength and chloride ion penetration resistance of the mortars. Here, the fine aggregate used in this study were the ordinary Portland cement clinker and the clinker with more waste as an...conference paper 2021
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Bediako, M. (author), Opoku Amankwah, E. (author), Valentini, L. (author)Clamp-firing system is a cost-effective technology used to produce burnt clay bricks in many West African countries including Ghana. However, this firing system generates between 7%- 15% of waste in a form of burnt broken bricks and with time creates disposal problems. In this work, burnt clay broken bricks were sampled and pulverised to 75...conference paper 2021
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Wu, Jiandong (author), Guo, Liping (author)Most of the waste glass, such as flat glass, glass bottle, is buried in the landfill, which is not desirable because it is not biodegradable and is not conducive to the long-term development of the environment. The glass powder (GP) with a certain fineness has excellent pozzolanic effect and can be used as a potential supplementary cementing...conference paper 2021
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Dong, H. (author), Yao, X. (author), Burgmann, S. (author), Ye, G. (author)Each year a large amount of construction and demolition waste (CDW) is generated in the European Union. For sustainability development the CDW is recycled and re-used. To promote the use of CDW, recycled aggregates from CDW were incorporated in alkali-activated concrete (AAC), which mainly consisted of secondary materials or industrial by...conference paper 2021
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Feng, Taotao (author), Jiang, Jinyang (author), Chu, Hongyan (author), Wang, Liguo (author)This paper reports on a study to determine the possibility of using ultra-fine fly ash (UFA) for partial or total replacement of normal fly ash (NFA) in ultra-high performance concrete (UHPC). Workability, microstructure, porosity, drying shrinkage as well as mechanical properties were comprehensively studied to investigate the influence of UFA...conference paper 2021
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Deng, Feilian (author), Zuo, Chenjia (author), Liu, Yanbo (author), Liu, Xianpeng (author)The incorporation of macro fibers have been an effective method to improve the mechanical and durability properties of concrete. As the mechanical properties of Macro fiber reinforced concrete are mostly tested at room temperatures, the effect of ambient temperature on the mechanical properties have been rarely reported. In this investigation,...conference paper 2021
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Silva, André (author), Nogueira, Rita (author), Bogas, J. Alexandre (author), Rodrigues, Miguel (author)Concrete is the most widely material used in the construction industry. However, it has a great environmental impact, mainly because of cement manufacture and the inherent CO2 emissions into the atmosphere. This research intends to contribute to the reduction of the environmental impact of the concrete industry through the uptake of CO2 during...conference paper 2021
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Yang, Sha (author), Ballschmiede, Conrad (author), Gilka-Bötzow, Albrecht (author), Koenders, Eduardus A.B. (author)Low density load bearing structural concrete members with improved thermal insulation properties, composed of lightweight aggregate (LWA) and foam concrete is investigated, which expands the application range of lightweight structural materials. This study aims to characterize a lightweight aggregate concrete with a foamed cementitious matrix ...conference paper 2021
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van Veelen, Frank (author)In the past years, small Earth Observation (EO) satellites have become increasingly capable of taking high-resolution images at high sample rates. These images contain valuable information for different sectors, such as the agricultural and military sector. Furthermore they can contain important information about the climate and climate change....master thesis 2021
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Christofi, Marios (author)The process in which a smooth laminar flow transits to a chaotic to a chaotic, turbulent state, is a topic of particular interest in the sectors of energy technology and aerodynamics. To study the different paths that can be followed during the transition process, various tools and methods have been developed. A preliminary investigation of the...master thesis 2021
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Burgers, Bastiaan (author)Decreasing injuries in football is a topic of interest for the KNVB and KNHB. To reach this goal, the use of smart sensor pants is researched. The data will be used to develop models for finding injury risk factors that are related to movements. Currently, the system is capable of reading out the IMUs and storing the data on an SD-card, for post...master thesis 2021
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Lantsoght, E.O.L. (author), Zarate Garnica, G.I. (author), Zhang, F. (author), Park, Min-Kook (author), Yang, Y. (author), Sliedrecht, Henk (author)For the assessment of existing slab-between-girder bridges, the shear capacity and failure mode are under discussion. Previous research showed that the static and fatigue punching capacity of the slabs is sufficient as a result of compressive membrane action. The girders then become the critical elements. This research studies the shear capacity...journal article 2021
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Kumari, Preeti (author), Myers, N.J. (author), Heath, Robert W. (author)Millimeter-wave (mmWave) joint communication-radar (JCR) will enable high data rate communication and high-resolution radar sensing for applications such as autonomous driving. Prior JCR systems that are based on the mmWave communications hardware, however, suffer from a limited angular field-of-view and low estimation accuracy for radars due...journal article 2021
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Dong, H. (author), Yao, X. (author), Burgmann, S (author), Ye, G. (author)Each year a large amount of construction and demolition waste (CDW) is generated in the European Union. For sustainability development the CDW is recycled and re-used. To promote the use of CDW, recycled aggregates from CDW were incorporated in alkali-activated concrete (AAC), which mainly consisted of secondary materials or industrial by...conference paper 2021
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Zhang, Kaiwen (author), Coutino, Mario (author), Isufi, E. (author)Graph sampling strategies require the signal to be relatively sparse in an alternative domain, e.g. bandlimitedness for reconstructing the signal. When such a condition is violated or its approximation demands a large bandwidth, the reconstruction often comes with unsatisfactory results even with large samples. In this paper, we propose an...conference paper 2021
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Chang, L. (author), Rots, J.G. (author), Esposito, R. (author)Out-of-plane (OOP) failure of unreinforced masonry (URM) walls in two-way bending was widely observed after natural hazards such as earthquakes. Of various crucial factors influencing the force capacity of URM walls in OOP two-way bending (force capacity being defined as the wall peak force in terms of pressure), the pre-compression and...journal article 2021
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Koolstra, Kirsten (author), Remis, R.F. (author)Purpose: To learn a preconditioner that accelerates parallel imaging (PI) and compressed sensing (CS) reconstructions. Methods: A convolutional neural network (CNN) with residual connections was used to train a preconditioning operator. Training and validation data were simulated using 50% brain images and 50% white Gaussian noise images....journal article 2021