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Nedeljković, Marija (author), Lukovic, M. (author), van Breugel, K. (author), Hordijk, D.A. (author), Ye, G. (author)This paper presents a development of a ductile alkali-activated fly ash (FA) and ground granulated blast furnace slag (GBFS) based composite as an environmentally friendly material for structural concrete application. For this purpose, polyvinyl alcohol (PVA) fibres and sand aggregate were combined with alkali-activated paste. Workability,...journal article 2018
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Lyu, W. (author), Schlangen, E. (author), van Breugel, K. (author)In order to gain a better understanding of the interaction between creep and micro-cracking during long-term creep process, a theoretical study was performed. An existing lattice model was modified to take creep into account. Based on the model, the micro-cracking in the creep process was simulated on a three-phase concrete sample under...conference paper 2018
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Pargar, F. (author), Koleva, D.A. (author), van Breugel, K. (author)Determination of the free chloride content in a concrete structure is important for evaluation of the risk of corrosion of reinforcing steel. The Ag/AgCl sensor is sensitive to chloride ions and exhibits an open circuit potential (OCP) that depends on the chloride ions activity in the environment. The interference of hydroxide and sulfide ions...conference paper 2018
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Gan, Y. (author), Zhang, H. (author), Šavija, B. (author), Schlangen, E. (author), van Breugel, K. (author)Cement paste is the main binding component in concrete and thus its fundamental properties are of great significance for understanding the fracture behaviour as well as the ageing process of concrete. One major aim of this paper is to characterize the micromechanical properties of cement paste with the aid of a nanoindenter. Besides, this paper...journal article 2018
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van Breugel, K. (author)Models play a vital role in science and technology and in the evolution of modern societies. They are used for describing processes and mechanisms, experimental observations, analyses and predictions. In spite of the fact that models are a reduction of reality, the achievements of modern societies are impressive and would have been...journal article 2018
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Pargar, F. (author), Kolev, H (author), Koleva, D.A. (author), van Breugel, K. (author)Characterization of the Ag/AgCl electrode is a necessary step toward its<br/>application as a chloride sensor in a highly alkaline medium, such as concrete.<br/>The nucleation and growth of AgCl on Ag in 0.1 M HCl was verified through<br/>cyclic voltammetry. Ag anodization was performed at current densities, determined<br/>by potentiodynamic...journal article 2018
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Chen, Zhipei (author), Koleva, D.A. (author), van Breugel, K. (author)Metallic corrosion can cause substantial damage at various levels and in almost all types of infrastructure. For metallic corrosion to occur, a certain external environment and the presence of corrodents are the prerequisites. Stray current-induced corrosion, however, is a rather underestimated issue in the field of corrosion and civil...journal article 2017
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Zhao, J. (author), Zheng, J. (author), Peng, Gai Fei (author), van Breugel, K. (author)High-performance concrete (HPC) is vulnerable to spalling under high temperature conditions and it has been found that the heating rate can exert a tremendous effect on spalling of HPC. To prevent HPC from spalling, the heating rate effect should be understood. However, quantitative analyses are still lacking and the heating rate effect has...journal article 2017
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Ouyang, X. (author), Koleva, D.A. (author), Ye, G. (author), van Breugel, K. (author)A complete understanding of the mechanisms upon which a filler acts in a cement-based material, e.g. as a C–S–H nucleation and/or growth-inducing factor, is of high importance. Although various studies report on accelerated cement hydration in the presence of fillers, the reason behind these observations is not completely understood yet. This...journal article 2017
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Susanto, A. (author), Koleva, D.A. (author), van Breugel, K. (author), van Beek, C. (author)This work reports on the development of microstructural and mechanical properties of mortar cubes under the synergetic action of stray current and various environmental/curing conditions. The study refers to specimens cured for 24h only, followed by a 112 days period of partial or full submersion in water or alkaline medium. Additionally,...journal article 2017
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Qian, Zhiwei (author), Schlangen, E. (author), Ye, G. (author), van Breugel, K. (author)Multiscale modeling for cement-based materials, such as concrete, is a relatively young subject, but there are already a number of different approaches to study different aspects of these classical materials. In this paper, the parameter-passing multiscale modeling scheme is established and applied to address the multiscale modeling problem...journal article 2017
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Susanto, A. (author), Peng, G (author), Koleva, D.A. (author), van Breugel, K. (author)Stray current is an electrical current “leakage” from metal conductors and electrical installations. When it flows through cement-based materials, electrical energy is converted to thermal energy that causes increasing temperature due to Joule heating phenomena. The aim of this paper is to shed light on the influence of electrical current flow...journal article 2017
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van Breugel, K. (author)Ageing is an inherent feature of nature and, hence, of materials, structures and systems. Yet, it seems a rather new topic in both science and engineering. The main reason for increasing attention for ageing as a topic is the growing awareness that, particularly in industrialized countries, ageing of our assets is a financial burden for the...journal article 2017
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Lukovic, M. (author), Ye, G. (author), Schlangen, E. (author), van Breugel, K. (author)In concrete repair systems, material properties in the repair material and interface are greatly influenced by the initial moisture content of the concrete (or mortar) substrate. In order to quantify moisture profiles inside the repair system, X-ray absorption was used. Preliminary studies are performed first to determine the absorption rate of...journal article 2017
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Pargar, F. (author), Koleva, D.A. (author), van Breugel, K. (author)This paper reports on the advantages and drawbacks of available test methods for the determination of chloride content in cementitious materials in general, and the application of Ag/AgCl chloride sensors in particular. The main factors that affect the reliability of a chloride sensor are presented. The thermodynamic behaviour of silver in the...journal article 2017
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Lukovic, M. (author), Šavija, B. (author), Ye, G. (author), Schlangen, E. (author), van Breugel, K. (author)Corrosion of steel reinforcement is the main cause of deterioration in reinforced concrete structures. It can result in cracking and spalling of the concrete cover. After the damaged cover is repaired, reinforcement corrosion might continue and even accelerate. While the development of the corrosion cell is difficult to control, the damage can...journal article 2017
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Lukovic, M. (author), Šavija, B. (author), Schlangen, E. (author), Ye, G. (author), van Breugel, K. (author)Differential shrinkage between repair material and concrete substrate is considered to be the main cause of premature failure of repair systems. The magnitude of induced stresses depends on many factors, for example the degree of restraint, moisture gradients caused by curing and drying conditions, type of repair material, etc. Numerical...journal article 2016
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van Breugel, K. (author), Polder, R.B. (author), de Rooij, M (author)For many concrete infrastructural works a service life of 80, 100 or 200 years is required. To convince owners and authorities that these requirements can be met probability-based models for service life predictions have been developed. These models are based on theoretical and experimental laboratory studies. Many of these models focus on...conference paper 2016
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Chen, Zhipei (author), Koleva, D.A. (author), van Breugel, K. (author)Stray current arising from direct current electrified traction systems and then circulat-ing in reinforced concrete structures may initiate corrosion or even accelerate existing corrosion processes on embedded reinforcement. Therefore, stray-current induced corrosion of nearby reinforced concrete structures deserves more attention in view of...conference paper 2015
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Chen, Zhipei (author), Koleva, D.A. (author), van Breugel, K. (author)In practice, reinforced concrete structures may encounter different kinds of curing conditions<br/>due to the weather (sun radiation, air moisture and wind), nearby external environment<br/>(seawater, attack of stray current arising from nearby railways), or human factors (insufficient<br/>curing period). In some extreme conditions, the...abstract 2015