Searched for: author:"Jonkers, H.M."
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Palin, D. (author), Mo, Yu (author), Wiktor, V.A.C. (author), Jonkers, H.M. (author)
Presented is a modified test for generating crack permeability data for cementitious materials. Single-parallel cracks were generated in mortar specimens. The width of the cracks was analysed through stereomicroscope and computer tomography, and the water permeability of the cracks was determined. Reduction factors and crack flow models were...
journal article 2019
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Kulshreshtha, Y. (author), Vardon, P.J. (author), Amorim Mota, N.J. (author), van Loosdrecht, Mark C.M. (author), Jonkers, H.M. (author)
With rapid industrialisation and the increase in popularity of concrete and brick constructions, a decline in earth houses has been observed especially in the rural areas of India. A survey was carried out in five regions of India to understand the technical and social factors favouring/limiting the construction and everyday use of earth houses....
book chapter 2019
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Vardon, P.J. (author), Amorim Mota, N.J. (author), van Loosdrecht, Mark C.M. (author), Jonkers, H.M. (author)
Earth houses are considered sustainable and affordable as compared to houses built with concrete or fired clay bricks. Moreover, it preserves the vernacular social and spatial traditions (cultural identity) of the community. With rapid industrialization and the increase in popularity of concrete and brick constructions, a decline in earth houses...
abstract 2018
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Jonkers, H.M. (author), Mors, R.M. (author)
The invention provides a process for the production of a cementitious material, comprising mixing cement starting materials, a healing agent and a fibrous reinforcing material, wherein the healing agent comprises bacterial material, and wherein the fibrous reinforcing material comprises a biodegradable polymer, having an average molecular weight...
patent 2016
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Mors, R.M. (author), Jonkers, H.M. (author)
conference paper 2015
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Binti Md Yunus, B. (author), Schlangen, E. (author), Jonkers, H.M. (author)
An experiment was carried out in this study to investigate the effect of compressive load on chloride penetration in self-healing concrete containing bacterial-based healing agent. Bacteria-based healing agent with the fraction of 2 mm – 4 mm of particles sizes were used in this contribution. ESEM was applied to study samples which were taken by...
conference paper 2015
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Tziviloglou, E. (author), Wiktor, V.A.C. (author), Jonkers, H.M. (author), Schlangen, E. (author)
The innovative technology of self-healing concrete allows the material to repair the open micro-cracks that can endanger the structure’s durability, due to ingress of aggressive liquids. Various concepts of self-healing concrete use encapsulation techniques, in order to immobilize and protect the healing agent during mixing and setting. In this...
conference paper 2015
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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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Palin, D. (author), Thijssen, A. (author), Wiktor, V. (author), Jonkers, H.M. (author), Schlangen, H.E.J.G. (author)
Ordinary Portland cement (OPC) mortar specimens submerged in sea-water were analysed through environmental scanning electron microscopy (ESEM) in back scattered electron (BSE) mode and nano-scratching. Results from both sets of analysis show the presence of distinct phases associated with aragonite, brucite and cement paste. Phases associated...
conference paper 2015
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Wiktor, V. (author), Jonkers, H.M. (author)
Biodeposition, a method by which calcium carbonate (CaCO3) precipitation is induced by bacteria, has been proposed as an interesting approach to protect building materials. The liquid-based system presented in this paper aims at the sealing of cracks and decrease of the porosity due to the production of a calcium-based biomineral. In this system...
conference paper 2015
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De Koster, S.A.L. (author), Mors, R.M. (author), Nugteren, H.W. (author), Jonkers, H.M. (author), Meesters, G.M.H. (author), Van Ommen, J.R. (author)
Concrete structures are often reinforced with steel. In order for the reinforcement to take over tensile forces, concrete has to crack. Through such cracks, water and compounds that are harmful to concrete can enter. This can cause durability issues like leakage, concrete degradation and reinforcement corrosion. In situ repair of cracks is often...
journal article 2015
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Wiktor, V.A.C. (author), Jonkers, H.M. (author)
This paper presents the field performance in a parking garage of the recently developed bacteria-based repair system for concrete. This liquid-based repair system aims at the sealing of cracks and decrease of the porosity due to the production of a calcium-based biomineral. The system combines advantages of both a traditional repair system for...
journal article 2015
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Sierra Beltran, M.G. (author), Jonkers, H.M. (author), Schlangen, E. (author)
The overall performance of concrete patch repair systems depends on the durability of and compatibility between the concrete substrate and the repair material. This paper investigates the performance of a new type of SHCC material with embedded bacteria as a repair material. The bacteria are a healing agent to enhance the durability of the...
conference paper 2014
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Tziviloglou, E. (author), Jonkers, H.M. (author), Schlangen, E. (author)
conference paper 2014
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Wiktor, V.A.C. (author), Jonkers, H.M. (author)
This paper focuses particularly on the ageing of concrete due to micro-crack formation or freeze/thaw which results in an increased permeability of the concrete. The bacteria-based repair system presented in this paper aims at recovering the concrete permeability thanks to bacteria-induced calcium carbonate precipitation inside cracks/porosity....
conference paper 2014
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Koleva, D.A. (author), Jonkers, H.M. (author), van Breugel, K. (author)
The improvement of material properties of cement-based materials e.g. reduced permeability, porosity, uniform distribution of hydration products, etc. is of a significant importance and related to durability and sustainability of concrete and reinforced concrete structures. With this respect, a recent and novel approach is to "create" self...
journal article 2013
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Wiktor, V. (author), Jonkers, H.M. (author)
The goal of this study is to develop a repair system for cementitious materials which features improved properties compared current available systems in terms of long term efficiency and environment friendliness. Thus, a bacteria-based repair system has been developed. The mineral formation mediated by bacterial activity results in the crack...
journal article 2013
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Zhang, J.L. (author), Deng, X. (author), Feng, X. (author), Han, N.X. (author), Jonkers, H.M. (author)
The CaCO3-mineralizing bacteria from different taxonomic groups have shown potential in restoration of construction material such as concretes, cements and stony materials. However, these strains are far from the demand of practical application due to some shortages, including the low mineralizing capacity. In this work, an integrated high...
conference paper 2013
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Palin, D. (author), Wiktor, V. (author), Jonkers, H.M. (author)
Marine concrete structures are exposed to one of the most hostile of natural environments. Many physical and chemical phenomena are usually interdependent and mutually reinforcing in the deterioration of marine exposed concrete: expansion and microcracking due to physical effects increases concrete permeability paving the way for harmful...
conference paper 2013
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León, E.J. (author), Koleva, D.A. (author), Jonkers, H.M. (author), Mol, J.M.C. (author), Terryn, H. (author), Van Breugel, K. (author)
Impressed current cathodic protection (CP) based on pulse technology has been proven to be a more efficient and effective alternative of traditional CP for reinforced concrete applications. Essentially, the superiority of pulse CP is in achieving the required steel polarization with otherwise reduced side effects (e.g. influence on bond strength...
conference paper 2013
Searched for: author:"Jonkers, H.M."
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