CETMA

Brindisi, Italy
Brindisi, Italy
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Borrelli G.,eResult s.r.l | Pistoia M.,eResult s.r.l | Casacci P.,eResult s.r.l | Leone A.,CNR Institute for Microelectronics and Microsystems | And 12 more authors.
Biosystems and Biorobotics | Year: 2015

The Care@Home project, funded by the Apulia Region, aims at developing an integrated system able to monitor and collect continuously vital parameters of the elderly or frail users in order to allow patients who require specific therapies or rehabilitation activities to perform them at home. By the means of ICT technologies and mobile devices simple to be used, such as smart phones or Tablet PCs able to carry out the monitoring activity noninvasively and assess the patient’s health status at the same time, it will be therefore possible to allow frail users to live as long as possible in their own home environment and to receive assistance in remote as well. Miscellaneous testing and experimentation activities and stages are going to be undertaken over the months to come in order to develop a first prototype consisting of a solution to monitor frail person and an electronic medical record accessible via the Internet from any remote location. Project objectives and initial results concerning the experimentation stage are here introduced. © Springer International Publishing Switzerland 2015.


Coricciati A.,CETMA | Ingrosso I.,CETMA | Sergi A.P.,CETMA | Largo A.,CETMA
Key Engineering Materials | Year: 2017

The preservation of heritage buildings requires multidisciplinary skills ranging from materials and seismic design up to structural monitoring. One of the most interesting innovative solution that is being developing in the last years is based on smart FRP (FRP - Fibre Reinforced Polymer) devices, which can combine contemporary reinforcing and monitoring purposes. The use of composite materials has many advantages in comparison with traditional retrofitting techniques, such as low weight, high strength-to-weight ratio, ease of handling, drapability, speed of installation, low thickness and visual impact. At the same time, monitoring the structure during its lifetime (strain, cracks, temperature, etc.) and evaluating its in-service integrity, in order to predict possible anomalous situations, can be achieved by the combination of FRP materials and embedded fibre optic sensors into a smart FRP device, suitable for both reinforcing and monitoring purposes. Optical fibres can provide reliable measurement even in harsh environment, as they are chemically durable, corrosion resistant, stable and insensitive to external electromagnetic and environmental perturbations, allowing long distances signal transmission and several measures in different points along the same optical fibre (multiplexing). Furthermore, the embedding into composite material will preserve them from rupture during handling and installation. In the present work, the application of smart FRP devices for the structural health monitoring of the Monastery in Sant'Angelo d'Ocre, L'Aquila, performed in the framework of the national project PROVACI, is reported. Six Smart Patches, consisting of FRP reinforcing sheet with point FBG (Fibre Bragg Grating) sensors embedded were applied on the extrados of two different vaults, while four Smart Rebars, consisting in FRP pultruded bars with distributed optical fibres sensors embedded, were installed in four buttress of one same vault. All the smart FRP devices, after being cabled, have been connected to the relative control units (BraggMETER from Fibersensing for FBG sensors and OBR4600 control unit of Luna Technologies for the distributed optical sensors) connected with a remote server for on-line remote monitoring. Before the installation, the Smart FRP devices have been preliminary calibrated and tested in the laboratory in terms of mechanical properties, strain sensitivity and accelerated aging. The monitoring on the Monastery has been conducted for five months, showing the reliability of entire system and of the signal transmitted by each sensor over the time. © 2017 Trans Tech Publications.


Visser J.,TNO | Couto S.,CeNTI | Gupta A.,BASF | Alvarez I.L.,Acciona | And 9 more authors.
Heron | Year: 2015

Producing concrete with secondary raw materials is an excellent way to contribute to a more sustainable world, provided that this concrete has at least the same performance during its service life as concrete made with the primary raw materials it replaces. Secondary raw materials for Light Weight (LW) aggregates (rigid polyurethane foams, shredded tire rubber and mixed plastic scraps) have been combined with secondary raw materials for the binder (fly ash, slag and perlite tailings) making sustainable concretes that were investigated for their suitability as LW, highly insulating concrete for four different types of applications. Compliance to desired engineering properties (workability, setting time) was not always feasible: it was mostly the low workability of the mixtures that limited their application. Contrary to well established cements, steering the workability by adding water was not an option for these binders that rely on alkali-activation. Eight successful mixtures have been tested further. The results have shown that it is possible to produce a non-structural sustainable concrete with good mechanical and thermal insulation properties. Design of concrete made with novel materials is currently not feasible without extensive experimentation as no design rules exist other than empirically derived rules based on traditional materials. As a radical different approach, a flexible concrete mix design has been developed with which the concrete can be modelled in the fresh and hardened state. The numerical concrete mix design method proves a promising tool in designing concrete for performance demands such as elasticity parameters and thermal conductivity.


Leone M.,University of Salento | Aiello M.A.,University of Salento | Rametta R.,CETMA | Raganato U.,CETMA
Mechanics of Composite Materials | Year: 2014

The paper deals with the structural response of mechanically fastened fiber-reinforced laminated thermoplastic composite joints. An experimental investigation was carried out to analyze the behavior of single-pinned joints made with woven glass-reinforced polypropylene composite laminates. A detailed experimental analysis was performed in order to predict the bearing response, failure strength, and failure mode of composite laminates containing a pin-loaded hole. The results obtained allow one to evaluate the influence of geometric parameters and the stacking sequence of laminates on the behavior of such joints. © 2014 Springer Science+Business Media New York.


De Riccardis M.F.,ENEA | Martina V.,CETMA | Carbone D.,ENEA
Journal of Physical Chemistry B | Year: 2013

Recently a great interest has been expressed in electrophoretic deposition (EPD) of polymers, both as particles and as chains. It is generally accepted that also for polymer particles, the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory is valid, therefore, in principle, polymer suspensions suitable for EPD could be easily obtained by dispersing polymer particles in an aqueous or nonaqueous medium. Nevertheless, this work demonstrated that in order to obtain good quality deposits based on poly(ether ether ketone) (PEEK) and poly(tetrafluoroethylene) (PTFE), some additives have to be used. In the case of PEEK, a dispersant providing citrate anions was successfully used, whereas for PTFE a steric suspension stabilization was reached by adding polyvinylpyrrolidone (PVP). In such a way, codeposition of PEEK and PTFE was achieved. The efficiency of the EPD process was demonstrated by means of differential scanning calorimetry (DSC) measurements. A thermal program consisting of heat/cool/heat cycles at a low rate was used in order to evaluate the crystalline amount of each polymer in the deposits. In order to explain the obtained results, it needed to also consider the dimension and structural characteristic of the polymer particles. © 2012 American Chemical Society.


Lignola G.P.,University of Naples Federico II | Angiuli R.,CETMA | Prota A.,University of Naples Federico II | Aiello M.A.,University of Salento
Materials and Structures/Materiaux et Constructions | Year: 2014

International and National Building Codes provide requirements for design and construction of new masonry structures, but design provisions for the repair, retrofitting, and rehabilitation of masonry structures are not always available and included in the same documents. Due to the extremely large variability in masonry performances, equations of general validity cannot often be provided, namely relationships suitable for every masonry type. Despite the great research effort in the experimental field, considerable theoretical work is still needed to fully outline a definitive analytical model to predict the behavior of FRP confined masonry. Most of the available models, empirical in nature, have been calibrated against their own sets of experimental data, or they are simply derived from concrete. Even if large amount of results obtained for concrete led to consolidated design guidelines, they cannot be simply extended to masonry. In this study, a mechanically based confinement model is proposed based on mechanical parameters able to differentiate similar masonry types and to highlight that they present different confinement performance. Crucial aspects of masonry confinement will be also discussed, namely: lateral dilation; confinement effectiveness; lateral pressure also in non-circular shapes; effective strain of FRP. © RILEM 2014.

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