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Baloch, Hassan (author), Grunewald, S. (author), Matthys, Stijn (author)There is a need to develop innovative repair materials which can overcome the challenges of cement-based repair mortars being relatively prone to shrinkage effects. In practice, free shrinkage of repair mortar is often considered as an indicator for potential cracking and delamination of applied repair mortars due to restrained shrinkage...journal article 2023
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Huang, Y. (author), Gu, D. (author), Mustafa, S. (author), Grunewald, S. (author), Lukovic, M. (author)Ultra-high performance fiber reinforced concrete (UHPFRC) is an advanced cementitious composite with high compressive strength and low permeability. Due to its excellent mechanical properties and superior durability, UHPFRC is considered promising for strengthening of the existing concrete bridges. In order to examine its strengthening...journal article 2023
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Huang, Y. (author), Grunewald, S. (author), Schlangen, E. (author), Lukovic, M. (author)Ultra-High Performance Fiber-Reinforced Concrete (UHPFRC) is, due to its superior mechanical properties and low permeability, a promising material for the restoration and improvement of the mechanical resistance and durability of existing Reinforced Concrete (RC) structures. This paper reviews the strengthening applications of UHPFRC in flexure,...review 2022
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Asprone, Domenico (author), Menna, Costantino (author), Bos, Freek (author), Mata-Falcón, Jaime (author), Ferrara, Liberato (author), Auricchio, Ferdinando (author), Cadoni, Ezio (author), Cunha, Vítor M. C. F. (author), Esposito, Laura (author), Fromm, Asko (author), Grunewald, S. (author), Kloft, Harald (author), Mechtcherine, Viktor (author), Nerella, Venkatesh Naidu (author), Schipper, H.R. (author)The form freedom enabled by digital fabrication with concrete technologies provides advantages for a wide range of concrete based objects, from architectural to structural elements. The current chapter focuses on the specifics of structural design and engineering of DFC with emphasis on those technologies based on Additive Manufacturing with...book chapter 2022
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Wangler, Timothy (author), Flatt, Robert J. (author), Roussel, Nicolas (author), Perrot, Arnaud (author), Sonebi, Mohammed (author), Wolfs, Rob (author), Bos, Freek (author), Lowke, Dirk (author), Grunewald, S. (author)Digital fabrication with cementitious materials is a rapidly growing field of research in which the evolution of strength during the various processes, such as 3D printing, is the key controlling parameter. The strength evolves over multiple orders of magnitude during the process, and thus, it is essential to properly characterize the strength...book chapter 2022
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Walraven, J.C. (author), Droogné, Didier (author), Grunewald, S. (author), Taerwe, Luc (author), Cotovanu, Bogdan (author), Rovers, John (author)An investigation is carried out into the applicability of self-compacting high-performance fiber concrete (HPFC) in foundations. A concrete mixture has been designed with a concrete cube strength of about 110 MPa. The concrete contains 60 kg/m<sup>3</sup> steel fibers. The properties of the HPFC developed are very suitable for structural...journal article 2021
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Grunewald, S. (author), Cotovanu, Bogdan (author), Rovers, John (author), Walraven, J.C. (author), Taerwe, Luc (author)An investigation was executed into the applicability of self-compacting high performance fiber concrete in foundations. The applied concrete has a concrete cube strength of about 110 MPa and contains 60 kg/m<sup>3</sup> hooked-end steel fibers (<i>L</i><sub><i>F</i></sub> = 30 mm, <i>D</i><sub><i>F</i></sub> = 0.38 mm). This publication consists...journal article 2021
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- Lukovic, M. (author), Jayananda, Nikhil (author), Roosen, M.A. (author), Grunewald, S. (author), Hordijk, Dick (author) conference paper 2020
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Reitsema, A.D. (author), Lukovic, M. (author), Grunewald, S. (author), Hordijk, D.A. (author)Most of the bridges and viaducts in the Netherlands were built in the sixties and seventies of the last century, and an increasing number of them will have to be replaced due to technical or functional reasons. The Netherlands is not an exception, many industrialized countries will face a similar replacement task in the near future. With the...journal article 2020
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Grunewald, S. (author), Schipper, H.R. (author)The transition period between the mixing of concrete and the begin of setting increasingly receives attention, as special production processes can be developed with tailor-made fresh state characteristics. In this publication the two processes of 3D Concrete Printing (3DCP) and the production with the Flexible Mould Process (FMP) are...conference paper 2020
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Keulen, A. (author), Yu, Q. L. (author), Zhang, Shizhe (author), Grunewald, S. (author)This paper investigates the influence of a plasticizing admixture on the pore structure refinement of alkali-activated concrete and paste mixtures and the consequently enhanced performance. Alkali-activated fly ash-slag concrete and paste are designed using a polycarboxylate-based admixture with different dosages. The pore structure and...journal article 2018
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Troian, S (author), Grunewald, S. (author), Schlangen, E. (author), Copuroglu, Oguzhan (author)The production of double-curved precast concrete elements for cladding or shell structures requires expensive CNC (computer numerical control)-milled formwork. As an alternative method, the innovative flexible mould for economically efficient and sustainable production of such elements is discussed in this paper. This method comprises the use of...conference paper 2018
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Schipper, H.R. (author), Grunewald, S. (author), Troian, S. (author), Raghunath, P. (author), Schlangen, E. (author), Copuroglu, Oguzhan (author)Expensive CNC (computer numerical controlled)-milled formwork is required for the production of double-curved precast concrete elements for cladding or shell structures. The innovative flexible mould method for economically efficient and sustainable production of such elements, developed at Delft University of Technology, comprises the use of a...conference paper 2017
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Sonebi, Mohammed (author), Grunewald, S. (author), Cevik, Abdulkadir (author), Walraven, J.C. (author)The purpose of this paper is to investigate the feasibility of using artificial neural network programming for the prediction of the fresh properties of self-compacting concrete. The input parameters of the neural network were the mix composition influencing the fresh properties of self-compacting concrete namely, the cement content, the...journal article 2016
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- Grunewald, S. (author), Liberato, F. (author), Dehn, F (author) conference paper 2016
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van der Vurst, F (author), Lesage, Karel (author), Grunewald, S. (author), Vandewalle, Lucie (author), Vantomme, John (author), Schutter, G (author)In spite of the many advantages, the use of self-compacting concrete<br/>(SCC) is currently widely limited to application in precast factories and sihiations<br/>in which external vibration would cause large difficulties. One of the main<br/>limitations is the higher sensitivity to small variations in mix proportions, material characteristics...conference paper 2016
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- Grunewald, S. (author), Schutter, G (author) conference paper 2016
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Onghena, S. (author), Grunewald, S. (author), Schutter, G (author)The effective production of concrete structures requires adequate control of<br/>strength development in order to realise the scheduled production cycles. Demoulding of elements can take place only when sufficient strength is gained and the production cycle has to be maintained with seasonal changes of temperature. The use of Portland Cement...conference paper 2016
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Onghena, S. (author), Grunewald, S. (author), Schutter, G (author)The development of strength is an important criterion for the production of<br/>prefabricated concrete elements. With seasonal changes of temperature that affect the development of concrete strength, daily cycles of often 18 hours or shorter have to bemaintained. The use of Ordinary Portland Cement (OPC) promotes high early age strength, but...conference paper 2016
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Van der Vurst, F. (author), Grunewald, S. (author), De Schutter, G. (author)Over time, several mix design metliods liave been developed to obtain a selfcompacting concrete (SCC) with suitable fresh and hardened concrete properties. The very fluid concrete with no need for external compaction is achieved by using a higher powder content and the use of chemical admixtures. Segregation and bleeding are prevented by either...conference paper 2015
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