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Nedeljkovic, M. (author), Mylonas, A. (author), Wiktor, V. (author), Schlangen, E. (author), Visser, J.H.M. (author)Fine recycled concrete aggregates (fRCA, 0–4 mm) are produced from demolished concrete structures and consist of natural aggregates and old cement mortar. The presence of old cement mortar has detrimental effect on the fresh properties and trength of new concrete. This study aims to investigate the working mechanism and effectiveness of...article 2022
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Allaix, D.L. (author), Bigaj-van Vliet, A.J. (author), Visser, J.H.M. (author), Valcke, S.L.A. (author)The European Green Deal published by the European Commission in December 2019 has set the target of 50% reduction of CO2 emissions and primary material consumption by 2030 compared to the 1990 levels. The construction sector is one of the key sectors where significant improvements are necessary for reaching the European targets. Among the...conference paper 2022
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Valcke, S.L.A. (author), Bigaj-van Vliet, A.J. (author), Allaix, D.L. (author), Braendstrup, C. (author), Visser, J.H.M. (author), Garzon Amortegui, J.F. (author), Wang, S.J. (author), Godoi Bizarro, D.E. (author), Szklarz, S.P. (author), Barros, E. (author)Sustainable development is a complex, multi-disciplinary and multi-sectoral challenge with often contradicting objectives. As such, in the strongly fragmented construction sector often only single aspects of the challenge are subject of innovations. Therefore the construction sector faces a huge challenge to meet multiple goals set a.o. in the...conference paper 2022
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Nedeljkovic, M. (author), Visser, J.H.M. (author), Nijland, T.G. (author), Valcke, S.L.A. (author), Schlangen, E. (author)In the Netherlands, beside cement replacement with more green cement types, there is also an urgent need for alternative materials for natural sand in new concrete in order to make it circular. Furthermore, the recyclers have raised questions regarding upscaling and the potential of fine recycled concrete aggregates (fRCA) in structural concrete...conference paper 2021
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Nedeljkovic, M. (author), Visser, J.H.M. (author), Nijland, T.G. (author), Valcke, S.L.A. (author), Schlangen, E. (author)In circular concrete design, beside cement replacement with more environmentally friendly cement types, there is also an urgent need for sand replacement with fine recycled concrete aggregates (fRCA). The variations in physical and chemical properties of fRCA and lack of standards for their quality evaluation are the main reasons for not yet...article 2021
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Nedeljkovic, M. (author), Visser, J.H.M. (author), Savija, B. (author), Valcke, S.L.A. (author), Schlangen, E. (author)This paper discusses the state-of-the-art of the fine recycled concrete aggregates (fRCA), focusing on their physical and chemical properties, engineering properties and durability of concretes with fRCA. Based on the systematic review of the published literature, it is impossible to deduce without any further research the guidelines and tools...article 2021
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- Visser, J.H.M. (author) public lecture 2018
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Visser, J.H.M. (author)The current theory of ASR gel formation in concrete between silicic acid anions with cations and is unable to explain the differences in concentration required for gel formation between e.g. potassium and sodium or the effect of calcium on the gel formation. In this paper, a new gelation mechanism is explained by means of a condensation between...article 2018
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Visser, J.H.M. (author)The lack of resistance models to determine the penetration of airborne chlorides into the concrete makes service-life prediction hardly possible for concrete structures exposed to chlorides, something badly needed as airborne chlorides can lead to severe bar corrosion even at 10 km (6 miles) from the sea. Predicting chloride penetration...conference paper 2018
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Visser, J.H.M. (author)On January 1st 2012, the European project SUS-CON has been started: “SUStainable, innovative and energy efficient CONcrete, based on the integration of all waste materials” (grant agreement no: 285463). The SUS-CON project aims at developing new technology routes to integrate waste materials in the production cycle of concrete. It should result...report 2015
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Visser, J.H.M. (author), Couto, S. (author), Gupta, A. (author), Alvarez, I.L. (author), Ligero, V.C. (author), Mayor, T.S. (author), Vinai, R. (author), Pipilikaki, P. (author), Largo, A. (author), Attanasio, A. (author), Huang, M.C. (author), Soutsos, M. (author)Producing concrete with secondary raw materials is an excellent way to contribute to a morearticle 2015
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Couto, S. (author), Assembleia, A. (author), Visser, J.H.M. (author), Mayor, T.S. (author)The performance of concrete products depends not only on the concrete compositions but alsoarticle 2015
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- Visser, J.H.M. (author), van Zon, Q.F. (author), Beijersbergen van Henegouwen, J.F. (author), Hacquebord, A. (author), van Zwet, R.G.A. (author) public lecture 2014
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Visser, J.H.M. (author)On January 1st 2012, the European project SUS-CON has been started: “SUStainable, innovative and energy efficient CONcrete, based on the integration of all waste materials” (grant agreement no: 285463). The SUS-CON project aims at developing new technology routes to integrate waste materials in the production cycle of concrete. It should result...report 2014
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Visser, J.H.M. (author)Carbonation of concrete at ambient CO2 concentration is a slow process. This makes the testing of the resistance of concrete against carbonation often too slow to be applicable for service life assessments of new structures. Raising the CO2-concentration will accelerate the test but the validity of an increase CO2-level is debated. If not valid,...article 2014
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Visser, J.H.M. (author), van Zon, Q.F. (author), Beijersbergen van Henegouwen, J.F. (author), Hacquebord, A. (author), van Zwet, R.G.A. (author)The amount of bound water in OPC i slag blends have been measured for three different temperature regimes: from 105 to 950°C, 400 to 600 oC and 600 to 950°C for three different OPCs and one type of slag, at 5 different replacement factor and at four ages. Based on the measured linear relationship between the amount of bound water with slag...conference paper 2014
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Visser, J.H.M. (author), Bigaj, A.J. (author)In order not to hampers innovations, the Dutch National Building Regulations (NBR), allow an alternative approval route for new building materials. It is based on the principles of equivalent performance which states that if the solution proposed can be proven to have the same level of safety, protection of health, energy efficiency and...conference paper 2014
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- Visser, J.H.M. (author) public lecture 2014
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- Visser, J.H.M. (author), Bigaj, A.J. (author) public lecture 2014
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- Visser, J.H.M. (author) public lecture 2014