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Sierra Beltran, M.G. (author), Jonkers, H.M. (author), Mors, R.M. (author), Mera-Ortiz, W. (author)This paper describes the first field application of self-healing concrete with alkaliphilic spore-forming bacteria and reinforced with natural fibres. The application took place in the highlands in Ecuador in July 2014. The concrete was cast as linings for an irrigation canal that transports water from glaciers in the Andean mountains to...conference paper 2015
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Savija, B. (author), Schlangen, E. (author)Concrete structures are commonly cracked when in service. To overcome issues arising from cracking, self-healing concrete is being developed. Together with the development of the material, techniques to verify and quantify self-healing are being developed. A number of destructive techniques have been used in the past. It would be beneficial to...conference paper 2015
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Schipper, H.R. (author), Eigenraam, P. (author), Grünewald, S. (author), Soru, M. (author), Nap, P. (author), Van Overveld, B. (author), Vermeulen, J. (author)The production of architectural elements with complex geometry is challenging for concrete manufacturers. Computer-numerically-controlled (CNC) milled foam moulds have been applied frequently in the last decades, resulting in good aesthetical performance. However, still the costs are high and a large volume of waste is produced. This paper...conference paper 2015
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Schipper, H.R. (author)The production of precast, concrete elements with complex, double-curved geometry is expensive due to the high costcosts of the necessary moulds and the limited possibilities for mould reuse. Currently, CNC-milled foam moulds are the solution applied mostly in projects, offering good aesthetic performance, but also resulting in waste of material...doctoral thesis 2015
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- De Boer, A. (author), Hendriks, M.A.N. (author), Van der Veen, C. (author), Belletti, B. (author) conference paper 2015
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Stroeven, P. (author)Path length measuring is a relevant engineering problem. Leonardo Da Vinci designed for the military appropriate equipment, the podometer, to do so. Modern equipment such as step meters and map meters are quite similar to Da Vinci?s design, despite geometrical statistical - stereological - methods based on theorems of Cauchy and Buffon that were...conference paper 2015
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- Mors, R.M. (author), Jonkers, H.M. (author) conference paper 2015
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Magan, Christopher (author), Coenders, J.L. (author), Huijben, F (author), Nijsse, R. (author), van der Horst, A.Q.C. (author)This paper presents a design for a topology-optimised concrete floor slab, of which the structural optimisation process is guided by manufacturability constraints from a vacuumatic formwork. Ihe design has been obtained using an open-source, tliree-dimensional topology optimisation algorithm. Traditional floor systems are cost-optimised but can...conference paper 2016
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Koekkoek, R.T. (author), Lantsoght, E.O.L. (author), Yang, Y. (author), Boer, A. de (author), Hordijk, D.A. (author)As the bridge stock in The Netherlands and Europe is ageing, various methods to analyse existing bridges are bemg studied. Proof loading of bridges is an option to study the capacity when crucial information about the structure is lacking. This information could be related to the material (for example, the effect of alkali-silica reaction on the...conference paper 2016
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Vegt, I. (author), Weerheijm, J. (author)Dynamic tests demonstrate an extensive rate effect on the tensile strength as well as the post-peak behaviour beyond loading rates of about 50 GPa/s. One of the possible explanations for the observed rate effects on the fracture behaviour is enhanced resistance by moisture in the pores. To study the influence of the moisture content and pore...conference paper 2016
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Pradena, M.A. (author), Houben, L.J.M. (author)During the construction of Jointed Plain Concrete Pavements (JPCPs) in Chile, it was observed that joints remained uncracked. The objectives of this paper are to evaluate the effects of uncracked joints (UnCrJ) in JPCPs and to propose possible solutions or improvements to avoid or minimize this phenomenon. Considering low thermal amplitude as...journal article 2016
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- Ramos, N. (author), Shamsutdinova, G. (author), Hendriks, M.A.N. (author), Jacobsen, S. (author) conference paper 2016
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Savija, B. (author), Schlangen, E. (author)An experimental study of the influence of autogeneous healing on chloride ingress in cracked concrete is presented. In the study, two concrete mixtures (a Portland cement mix and a blast furnace slag mix), two healing regimes (submerged and fog room regime), two cracking ages (14 and 28 days), and multiple crack widths are used as parameters. An...journal article 2016
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Pargar, F. (author), Koleva, D.A. (author)When studying chloride-induced corrosion in reinforced concrete structures, essential information of interest is the concentration of chloride ions in the system. The absence of a reliable method for monitoring the free chloride ions justifies the attempts towards establishing a feasible practice in the application of the already known Ag/AgCl...journal article 2017
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Šavija, B. (author), Feiteira, J. (author), Araújo, M. (author), Chatrabhuti, S. (author), Raquez, JM (author), van Tittelboom, K (author), Gruyaert, Elke (author), de Belie, N (author), Schlangen, E. (author)Polymeric capsules can have an advantage over glass capsules used up to now as proof-of-concept carriers in self-healing concrete. They allow easier processing and afford the possibility to fine tune their mechanical properties. Out of the multiple requirements for capsules used in this context, the capability of rupturing when crossed by a...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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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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Jonkers, H.M. (author)The since 2010 running research program 'Bio-Based Geo & Civil Engineering for a Sustainable Society (BioGeoCivil)', funded by the Dutch technology foundation STW, aims to develop novel bio-based construction materials that can be used in Civil- and Geo-engineering constructions to enhance the sustainability performance of the sector....journal article 2017
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de Witte, D. (author), de Klijn-Chevalerias, M.L. (author), Loonen, R.C.G.M. (author), Hensen, J.L.M. (author), Knaack, U. (author), Zimmermann, G. (author)This paper reports on the research-driven design process of an innovative thermal mass concept: Convective Concrete. The goal is to improve building energy efficiency and comfort levels by addressing some of the shortcomings of conventional building slabs with high thermal storage capacity. Such heavyweight constructions tend to have a slow...journal article 2017
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Lottman, B.B.G. (author)The spalling damage observed to concrete structures after severe fire exposure has been the topic of scientific research for the past decades. This phenomenon is commonly characterised by the sudden and in some cases violent breaking off of concrete pieces from the cross-section. In this thesis the derivation and the numerical results of a...doctoral thesis 2017