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He, S. (author), Lukovic, M. (author), Jonkers, H.M. (author), Schlangen, E. (author)In the current study, experiments were carried out to investigate the structural performance of reinforced concrete (RC) beams with a self-healing cover zone. The cover zone consists of a 1.5-cm-thick layer of bacteria-embedded strain hardening cementitious composite (SHCC) for a combination of crack width control and crack healing. The aim is...conference paper 2023
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Veeger, M.I.A. (author), Nabbe, Arendje (author), Jonkers, H.M. (author), Ottele, M. (author)Implementing nature in cities has great potential to improve urban liveability by providing ecosystem services, which can help mitigate heat stress, improve air quality, attenuate noise, and reduce rainwater run-off. However, widespread adoption of urban nature and green building typologies is still limited due to their costs, environmental...journal article 2023
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Zhilyaev, D. (author), Fachinotti, Victor D. (author), Zanoni, Francesca (author), Ortega, Amaya (author), Goracci, Guido (author), Mankel, Christoph (author), Koenders, Eduardus A.B. (author), Jonkers, H.M. (author)This study presents an early-stage design exploration of NRG-Foam, an innovative insulation material composed of cementitious foam doped with microencapsulated phase change materials (MPCMs). The study comprises the static part that utilizes life cycle assessment and life cycle costing assessment for getting insight into the impacts of the...journal article 2023
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He, S. (author), Wan, Z. (author), Chen, Y. (author), Jonkers, H.M. (author), Schlangen, E. (author)The current study investigates short-term and long-term crack-healing behaviour of mortars embedded with bacteria-based poly-lactic acid (PLA) capsules under both ideal and realistic environmental conditions. Two sets of specimens were prepared and subjected to different healing regimes, with the first set kept in a mist room for varying...journal article 2023
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Rossi, E. (author), Raghavan, A. (author), Copuroglu, Oguzhan (author), Jonkers, H.M. (author)In this study, the applicability of two bacteria-based healing agents (e.g., poly-lactic acid and polyhydroxyalkanoate) in blast furnace slag cement (BFSC) mortar has been assessed. An experimental campaign on the functional properties, self-healing capacity, freezing–thawing and carbonation resistance has been conducted in comparison with plain...journal article 2022
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Kulshreshtha, Y. (author), Vardon, P.J. (author), Meesters, G.M.H. (author), van Loosdrecht, Mark C.M. (author), Mota, Nelson (author), Jonkers, H.M. (author)The water-resistance of cow-dung has made it a widely used stabiliser in traditional earthen structures in several Asian and African countries. Multiple studies have shown an improvement in water-resistance with the addition of cow-dung, but none provides insight into this behaviour. The present study investigates the water-resistance behaviour...journal article 2022
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Kulshreshtha, Y. (author), Vardon, P.J. (author), Du, Y. (author), Habert, G. (author), Vissac, A. (author), Morel, J.C. (author), van Loosdrecht, Mark C.M. (author), Mota, Nelson (author), Jonkers, H.M. (author)Earthen construction is re-gaining popularity as an ecological and economical alternative to contemporary building materials. While building with earth offers several benefits, its performance due to water ingress is a concern for its widespread application. This limitation is often solved by adding chemical stabilisers such as Portland cement...journal article 2022
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Rossi, E. (author), Rahul, R. (author), Copuroglu, Oguzhan (author), Jonkers, H.M. (author)The possible beneficial impact of self-healing on chloride transport through cracks has been assessed for two bacteria-based self-healing mortar mixtures in comparison with Ordinary Portland cement mortar. Intact self-healing specimens featured lower chloride transport coefficients thanks to a denser microstructure and to the formation of a...journal article 2022
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Stache, E. (author), Schilperoort, B. (author), Ottele, M. (author), Jonkers, H.M. (author)The urban heat island, is a serious threat for the urban well-being, and can be determined by the local energy balance. The surface energy balance, with respect to incoming radiative energy and subsequent partitioning into reflected energy (albedo), absorbed energy and further partitioning of latter into convectional heat (QH), radiative heat ...journal article 2022
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Setiadji, Bagus Hario (author), Wibowo, M. Agung (author), Jonkers, H.M. (author), Ottele, M. (author), Qomaruddin, Mochammad (author), Sugianto, Felix Hariyanto (author), Lie, Han Ay (author)Asphalt pavement consists of aggregates resulting in a waste material at end of its life. The aggregates can be reused as basic material for asphalt or cementitious binding agents. In both scenarios, the recycled aggregates should provide a good bond with the binder to achieve strength. This study focuses on reusing recycled asphalt...journal article 2022
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Schraven, D.F.J. (author), Arghandeh Jouneghani, P. (author), Jonkers, H.M. (author), Hertogh, M.J.C.M. (author)Sustainability transitions require that sustainable innovations develop and scale-up. Two promising approaches contribute to this purpose. Design thinking (DT) focuses on the creative development of sustainable innovations to achieve desirable, feasible and viable products. Strategic niche management (SNM) addresses how sustainable...journal article 2021
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Palin, D. (author), Style, Robert W. (author), Zlopasa, J. (author), Petrozzini, Jonathan J. (author), Pfeifer, Mark A. (author), Jonkers, H.M. (author), Dufresne, Eric R. (author), Estroff, Lara A. (author)The promise of crystal composites with direction-specific properties is an attractive prospect for diverse applications; however, synthetic strategies for realizing such composites remain elusive. Here, we demonstrate that anisotropic agarose gel networks can mechanically "mold" calcite crystal growth, yielding anisotropically structured,...journal article 2021
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Vermeer, C.M. (author), Rossi, E. (author), Tamis, J. (author), Jonkers, H.M. (author), Kleerebezem, R. (author)Polyhydroxyalkanoate (PHA) production is a promising opportunity to recover organic carbon from waste streams. However, widespread application of waste-derived PHA as biodegradable plastic is restricted by expensive purification steps, high quality requirements, and a fierce competition with the conventional plastic market. To overcome these...journal article 2021
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Rossi, E. (author), Romero Rodriguez, C. (author), Jonkers, H.M. (author), Copuroglu, Oguzhan (author)Since self-healing of cementitious materials can theoretically improve the service-life of concrete structures, it has gathered significant attention from both researchers and industry during the last two decades. Many researchers have proposed different methods to assess and quantify the self-healing capacity (i.e. the ability of...journal article 2021
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Roy, Rahul (author), Rossi, E. (author), Silfwerbrand, Johan (author), Jonkers, H.M. (author)In this study, a novel non-toxic, biodegradable bacteria-based healing agent known as alkanoate derivatives (AKD) derived from wastewater was investigated for its self-healing efficiency of the mortar specimens in comparison to the already-developed healing agents made of lactic acid derivatives (PLA). Mortar with different percentages of...journal article 2021
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Rossi, E. (author), Vermeer, C.M. (author), Mors, R.M. (author), Kleerebezem, R. (author), Copuroglu, Oguzhan (author), Jonkers, H.M. (author)Bacteria-based self-healing concrete has the ability to heal cracks due to the bacterial conversion of incorporated organic compounds into calcium carbonate. Precipitates seal the cracks, theoretically increasing the service life of constructions. The aim of this paper is to propose a precursor for bacteria-based self-healing concrete derived...journal article 2021
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Mors, R.M. (author), Jonkers, H.M. (author)Bacteria‐based self‐healing concrete is an innovative concrete that contains a self‐healing agent that provides the material with enhanced autonomous crack‐sealing performance. A specific type of this concrete, based on a healing agent composed of bacterial spores and lactate as carbon source, has been developed and applied by the Delft...journal article 2020
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Kulshreshtha, Y. (author), Mota, Nelson (author), Jagadish, Kaup S. (author), Bredenoord, Jan (author), Vardon, P.J. (author), van Loosdrecht, Mark C.M. (author), Jonkers, H.M. (author)There is an enormous demand for rural housing in India that needs to be catered for within a short span of time. Building with earth (mud) is proposed as an economical and environmental friendly alternative due to the rising costs of conventional building materials. However, the construction of earthen houses has significantly declined in...journal article 2020
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Lankhorst, Gerran (author), Arts, Janko (author), Terwel, K.C. (author), Jonkers, H.M. (author)The choice of structural system has a big influence on the environmental impact of structural materials in tall building design. This paper provides a comparison of the environmental impact of several structural systems for high-rise buildings. The environmental performance for relatively slender buildings in the range of 150 to 250 meters in...journal article 2019
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Stache, E. (author), Jonkers, H.M. (author), Ottele, M. (author)Bijna alle stedelijke klimatologische problemen zijn te herleiden naar het ontbreken van ecosysteemdiensten. Dat blijkt uit onderzoek van de TU Delft Faculteit Civiele Techniek, afdeling Materialen en Duurzaamheid. ‘Ook vonden we dit gebrek medeverantwoordelijk voor veel stedelijke sociale problemen,’ aldus de auteurs. Op basis van het onderzoek...journal article 2019