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Sonic assessment of physical ageing of plastic pipes

Makris, K. (author), Langeveld, J.G. (author), Clemens-Meyer, François H.L.R. (author), Watts, Joanna (author), Begum, Hasina (author), Horoshenkov, Kirill V. (author)

This article explores the potential of vibro-acoustics to detect physical ageing of plastic pipes. For this purpose, two different topics are combined: the ability of vibro-acoustics to estimate the storage modulus of a plastic pipe, and the sensitivity of the estimated storage modulus to changes due to ageing. Concerning the first topic, a...

journal article 2023

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Socially sustainable housing and built environments to support the health and social inclusion of older adults: Protocol for a scoping review and stakeholder consultation

Sturge, Jodi (author), Miedema, E. (author), Elf, Marie (author), Nordin, Susanna (author)

Introduction: Housing and the ageing population are issues that pose challenges for social, health and economic policies. Therefore, there is a need for more knowledge on how to design housing and public infrastructure to improve the social engagement and well-being of older adults who age in place. This project aims to provide an overview of...

review 2023

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Surface Tensile Strength and Hertzian Fracture Resistance of Patterned Acid-Etched Glass

Datsiou, Kyriaki Corinna (author), Overend, M. (author)

Patterned acid-etched glasses are frequently used in horizontal glass surfaces that may be walked on, such as floors and staircase treads. These glasses provide useful antislip properties, but the foot traffic cause contact stresses and ageing mechanisms that are poorly understood and can affect the strength of the acid-etched glass. This...

journal article 2023

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Do chemistry and rheology follow the same laboratory ageing trends in bitumen?

Pipintakos, Georgios (author), Lommaert, Caitlin (author), Varveri, Aikaterini (author), Van den bergh, Wim (author)

The ageing of bitumen has received great attention both from a chemical and rheological perspective due to its direct impact on asphalt performance. However, open questions with respect to the convergence of the synchronous ageing changes in rheology and chemistry of bitumen still exist. This paper addresses these alterations of chemistry and...

journal article 2022

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Extensive testing on PVC sewer pipes towards identifying the factors that affect their operational lifetime

Makris, K. (author), Langeveld, J.G. (author), Clemens, F.H.L.R. (author)

Polyvinyl chloride (PVC) sewer pipes have operated for decades in a hostile environment, raising concern among sewer managers over the longevity of their drainage systems. Inspection data (CCTV and Panoramo®) reveals that severe defects have already surfaced, yet it is unknown if the material properties of PVC sewers have been affected. In...

journal article 2021

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Compensation due to age-related decline in sit-to-stand and sit-to-walk

van der Kruk, E. (author), Silverman, Anne K. (author), Reilly, Peter (author), Bull, Anthony M.J. (author)

Capacity is the physiological ability of the neuromusculoskeletal systems; this declines with age. This decline in capacity may result in the inability to stand up (sit-to-stand, sit-to-walk), which is an important movement for independent living. Compensation, as a result of functional redundancy, is key in understanding how much age-related...

review 2021

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Effect of salt spray ageing on the fracture of composite-to-metal bonded joints

Arouche, M.M. (author), Saleh, M. (author), Teixeira De Freitas, S. (author), De Barros, S.R. (author)

This work investigates the effect of long-term environmental exposure on the performance of composite-to-metal bonded joints. Specimens are manufactured using a carbon-fiber reinforced polymer (CFRP) co-bonded to a steel member with epoxy adhesive and aged in a salt spray chamber. The mixed-mode fracture behavior of the non-aged and aged...

journal article 2021

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Effect of mineral fillers on ageing of bituminous mastics

Mastoras, Filippos (author), Varveri, Aikaterini (author), van Tooren, M.M. (author), Erkens, S. (author)

Past research has shown that the ageing process of bitumen is not solely a function of the bitumen type itself, but rather, added effects have been identified attributed to the presence of fillers. Nevertheless, contradicting results exist between the various studies with respect to the implications of fillers on the ageing process of bitumen...

journal article 2021

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Exploring the oxidative mechanisms of bitumen after laboratory short- and long-term ageing

Pipintakos, Georgios (author), Soenen, Hilde (author), Ching, H. Y.Vincent (author), Velde, Christophe Vande (author), Doorslaer, Sabine Van (author), Lemière, Filip (author), Varveri, Aikaterini (author), Van den bergh, Wim (author)

Understanding the fundamental mechanisms of oxidative ageing in bitumen is considered of paramount importance in order to take steps towards durable binders able to tackle distresses related to this phenomenon which deteriorates the asphalt performance. This paper focuses on the identification of the intermediate and final oxygenated products...

journal article 2021

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Structure-function specialisation of the interfascicular matrix in the human achilles tendon

Patel, Dharmesh (author), Zamboulis, Danae E. (author), Spiesz, E.M. (author), Birch, Helen L. (author), Clegg, Peter D. (author), Thorpe, Chavaunne T. (author), Screen, Hazel R.C. (author)

Tendon consists of highly aligned collagen-rich fascicles surrounded by interfascicular matrix (IFM). Some tendons act as energy stores to improve locomotion efficiency, but such tendons commonly obtain debilitating injuries. In equine tendons, energy storing is achieved primarily through specialisation of the IFM. However, no studies have...

journal article 2021

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Flavour-improved alcohol-free beer – Quality traits, ageing and sensory perception

Gernat, D.C. (author), Brouwer, E. R. (author), Faber-Zirkzee, R. C. (author), Ottens, M. (author)

The increasing popularity of alcohol-free beers (AFBs) fosters the industry interest in delivering the best possible product. Yet, a remaining sensory defect of AFBs is the over-perception of wort flavour, caused by elevated concentrations of small volatile flavour compounds (i.e. aldehydes). Previously, molecular sieves (hydrophobic ZSM-5...

journal article 2020

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Where ergonomics meets geriatrics: The connection between comprehensive geriatric assessment and design for ageing

van der Cammen, T.J.M. (author), Wang, G. (author), Albayrak, A. (author)

contribution to periodical 2019

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Ageing of bituminous materials: Experimental and numerical characterization

Jing, R. (author)

Research of the ageing mechanisms in the Netherlands is crucial to deal with ageing infrastructure and the growing pressure on and lack of natural resources. The use of porous asphalt incurs the additional costs because of the shorter service life and the more expensive maintenance required. On the other hand, the Dutch road engineering...

doctoral thesis 2019

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Modelling in the service of sustainable construction

van Breugel, K. (author)

The world’s infrastructure is vital for providing accommodation and mobility for people. Although it is obvious that the construction industry has been crucial for realizing building and civil infrastructures, it is also clear that building activities have a big impact on the environment. Still growing and developing societies and economies...

journal article 2019

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Association of polypharmacy and hyperpolypharmacy with frailty states: A systematic review and meta-analysis

Palmer, Katie (author), Villani, Emanuele R. (author), Vetrano, Davide L. (author), Cherubini, Antonio (author), Cruz‑Jentoft, Alfonso J.  (author), Curtin, Denis (author), Denkinger, Michael (author), Gutiérrez‑Valencia, Marta  (author), Guðmundsson, Adalsteinn (author), van der Cammen, T.J.M. (author)

Purpose: To investigate: (1) the cross-sectional association between polypharmacy, hyperpolypharmacy and presence of prefrailty or frailty; (2) the risk of incident prefrailty or frailty in persons with polypharmacy, and vice versa. Methods: A systematic review and meta-analysis was performed according to PRISMA guidelines. We searched PubMed...

journal article 2019

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Shoe design for older adults: Evidence from a systematic review on the elements of optimal footwear

Jellema, A.H. (author), Huysmans, T. (author), Hartholt, Klaas (author), van der Cammen, T.J.M. (author)

Due to changes in foot morphology and the occurrence of foot deformities and foot pain with ageing, older people frequently wear ill-fitting shoes. This can lead to negative effects on comfort and mobility. A review of the literature was performed in Medline, Scopus and Embase with the aim (a) to evaluate the effects of shoes or shoe elements on...

review 2019

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Ageing effect on chemo-mechanics of bitumen

Jing, R. (author), Varveri, Aikaterini (author), Liu, X. (author), Scarpas, Athanasios (author), Erkens, S. (author)

Ageing has a significant impact on the chemical and mechanical behavior of bituminous materials. In this study, Fourier Transform Infrared (FTIR) spectrometer and Dynamic Shear Rheometer (DSR) tests were utilized to investigate the effect of ageing on the chemical and mechanical properties of bitumen. Bitumen films with thickness of 2 mm were...

book chapter 2019

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The effect of ageing on chemical and mechanical properties of asphalt mortar

Jing, R. (author), Liu, X. (author), Varveri, Aikaterini (author), Scarpas, Athanasios (author), Erkens, S. (author)

Asphalt mortar is a mixture of bitumen, filler, and sand. Mortar plays an important role in asphalt mixtures as it serves as the adhesive between the coarser aggregates. Due to the effect of bitumen ageing, the chemical and mechanical properties of asphalt mortar evolve with time. The mortar becomes more brittle and prone to cracking, thus...

journal article 2018

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Effect of Thermal Cycling and Aging on Heated Fiber Metal Laminates and Glass-Fiber Epoxy Composites

Hagenbeek, M. (author), Muller, B. (author), Sinke, J. (author)

By integrating heater elements in Fiber Metal Laminates, such as GLARE, the material has a promising potential as de- or anti-icing system in aircraft structures. Application of this so called "heated GLARE" material will however result in increase and (up to ten fold) more frequent temperature loading compares to the regular flight...

journal article 2018

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Effects of different aging methods on chemical and rheological properties of bitumen

Tarsi, G. (author), Varveri, Aikaterini (author), Lantieri, Claudio (author), Scarpas, Athanasios (author), Sangiorgi, Cesare (author)

Bitumen undergoes ageing, which leads to changes in its chemical and rheological properties, causing it to become harder and more brittle with time. This study aims to compare the effects of different laboratory ageing methods on the chemistry and rheology of three bitumen types: a Pen 40=60, a Pen 70=100, and a polymer-modified bitumen (PmB)...

journal article 2018