Searched for: subject:"Cementitious%5C+materials"
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Zhang, H. (author)
Cementitious materials are heterogeneous on mutliple length scales, from nanometres to metres. Consequently, their macroscopic mechanical properties are affected by material structures at all length scales. In pursuit of fundamental understanding the relationship between their multiscale heterogeneous material structure and mechanical properties...
doctoral thesis 2019
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Zhang, Y. (author), Ye, G. (author)
An analytical model for predicting the relative chloride diffusion coefficient in cementitious materials at different degrees of water saturation is presented in this paper. The model is developed based on the Nernst-Einstein equation and conductivity of cementitious electrolyte, as well as on moisture distribution in the pore structure. Good...
journal article 2019
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Palin, D. (author), Mo, Yu (author), Wiktor, V.A.C. (author), Jonkers, H.M. (author)
Presented is a modified test for generating crack permeability data for cementitious materials. Single-parallel cracks were generated in mortar specimens. The width of the cracks was analysed through stereomicroscope and computer tomography, and the water permeability of the cracks was determined. Reduction factors and crack flow models were...
journal article 2019
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Zhang, Y. (author)
Chloride-induced reinforcement corrosion, caused by chloride diffusion in the unsaturated concrete cover, is a major durability problem of concrete structures. Current concepts for concrete mixture design and for service life prediction are generally based on the understanding of the chloride diffusion coefficient of saturated concrete. This...
doctoral thesis 2018
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Chandra Paul, Suvash (author), Šavija, B. (author), Babafemi, Adewumi John (author)
Disposal of consumer waste is a major challenge in urban areas around the world. In the field of building materials, it has long been recognized that many types of wastes can be used instead of raw materials. In addition, production of binders such as Portland cement is a CO<sub>2</sub> intensive process. However, for widespread use of wastes...
review 2018
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Lv, Leyang (author), Schlangen, H.E.J.G. (author), Xing, Feng (author)
Water ingress into cracked concrete structures is a serious problem, as it can cause leakage and reinforcement corrosion and thus reduce functionality and safety of the structures. In this study, the application of water-swelling rubber particles for providing the cracked concrete a self-sealing function was developed. The feasibility of...
journal article 2017
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Sánchez de Rojas, M.I. (author), Asensio, E. (author), Frías, M. (author), Medina, C. (author)
Construction and demolition waste (C&DW) is a source of alternative raw materials. The promising research findings on fired clay-based construction and demolition waste as active cement additions herald its practical application in several construction sub-industries. Nonetheless, new dimensions and applications have yet to be studied. One would...
conference paper 2017
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Zhang, Y. (author), Ye, G. (author)
Due to environmental (low CO2 emission) and economic benefit, supplementary cementitious materials (SCMs) have been widely used in reinforced concrete structures. However, the question from engineering practice is to which extend these blended mixtures do meet the future durability criteria. Chloride ingression is nowadays considered as the main...
conference paper 2015
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Huang, H. (author)
Concrete is a brittle composite cementitious material that easily fractures under tensile loading. Microcracks can appear throughout the concrete prior to application of any load because of temperature-induced strain and autogenous and drying shrinkage. There is no doubt that these cracks provide preferential access for aggressive agents to...
doctoral thesis 2014
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Huang, H. (author), Ye, G. (author), Damidot, D. (author)
In this study, a coupled transport-reaction model was specifically developed for simulating autogenous self-healing in cementitious materials. The diffusion of ions between the solution in the crack and in the bulk paste is simulated with a transport model. The concentration of ions in the crack can be calculated. As the kinetics of chemical...
conference paper 2014
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Zhang, Y. (author), Wu, B. (author), Zhou, J. (author), Ye, G. (author), Shui, Z. (author)
Concrete containing supplementary cementitious materials (SCMs) has different durability properties from that containing pure Portland cement. The durability of concrete is always associated with the properties of microstructure, especially pore structure. Pressurization–Depressurization Cycling Mercury Intrusion Porosimetry (PDC-MIP) was...
conference paper 2014
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Harbottle, M.J. (author), Zhang, J. (author), Gardner, D.R. (author)
The outcomes of a preliminary experimental programme into a gel-based healing system that allows immediate healing of cementitious materials followed by longerterm development of robust healing through biological processes are reported. Alginate gels protect and maintain the viability of encapsulated microorganisms and have been used for...
conference paper 2013
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Huang, H. (author), Ye, G. (author)
Since self-healing of cracks is able to improve the durability of concrete structures, it has attracted much attention in the recent years. As known, in concrete matrix there are large amounts of cement grains remaining unhydrated, particularly in high performance concrete. Further hydration of these unhydrated cement grains has potential to...
conference paper 2013
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De Belie, N. (author), Van der Zwaag, S. (author), Gruyaert, E. (author), Van Tittelboom, K. (author), Debbaut, B. (author)
Symposium organised by Ghent University, Department of Structural Engineering and Delft University of Technology, Aerospace Structures & Materials. Materials play an extremely important role in our lives. These materials may be of a very different nature ranging from metals over concrete to polymers and composite materials. They all have in...
book 2013
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Litina, C. (author), Al-Tabbaa, A. (author)
Aqueous cement suspensions without aggregates have been commonly applied as a remedial technique in structural and geotechnical applications, often comprising part of the permanent infrastructure. These suspensions derive their mechanical characteristics and properties through the same hydration processes and binding chemistry as concrete; thus...
conference paper 2013
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Ramos, J.A. (author), Dekeyser, B. (author), Rahier, H. (author)
Poly(urethanes) (PU) can be used as healing agent to heal cracks in self-healing concrete. Studying the reaction kinetics is however difficult as the PU needs environmental moisture to cure. On the other hand the moisture in the concrete could play a role in the reactions. To monitor the reactions a technique where environmental moisture can...
conference paper 2013
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Huang, H. (author), Ye, G. (author)
Since self-healing of cracks is able to improve the durability of concrete structures, it has attracted much attention in the recent years. As known, in concrete matrix there are large amounts of cement grains remaining unhydrated, particularly in high performance concrete. Further hydration of these unhydrated cement grains has potential to...
conference paper 2013
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Olivier, K. (author), Darquennes, A. (author), Benboudjema, F. (author), Gagné, R. (author)
In order to limit the release of CO2 produced in cement manufacturing, clinker (the major cement component) is often partially replaced by mineral admixtures like blastfurnace slag. The use of mineral admixtures presents different advantages such as the recycling of industrial waste and the improvement of different material properties ...
conference paper 2013
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Gardner, D. (author), Herbert, D. (author), Jayaprakash, M. (author), Jefferson, A. (author)
Recent developments in self-healing technology inspired by natural biological materials have the potential to dramatically improve the performance and durability of cementitious materials. These self-healing cementitious materials comprise artificial flow networks embedded within the cementitious matrix that upon damage release healing agents...
conference paper 2013
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Pedersen, R.R. (author)
A safe design of civil engineering concrete structures must include dynamic loading conditions. However, the knowledge on crack patterns and tensile failure strength of concrete material as a function of the dynamic loading is not sufficiently understood to accurately predict the risks and consequences of accidents. Concrete is a rate-dependent...
doctoral thesis 2010
Searched for: subject:"Cementitious%5C+materials"
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