Luca Sorelli

Luca Sorelli
Laval University | ULAVAL · Department of Civil Engineering

Ph.D.

About

85
Publications
19,234
Reads
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1,771
Citations
Additional affiliations
September 2018 - present
École Polytechnique Fédérale de Lausanne
Position
  • Professor
June 2018 - present
Univerversité Laval
Position
  • Professor (Full)
July 2014 - April 2018
Laval University
Position
  • Professor (Associate)

Publications

Publications (85)
Chapter
Full-text available
Ultra-high performance concrete (UHPC) is a class of cement-based composites with enormous potentials for sustainable construction thanks to its outstanding compressive strength and cracking resistance. While the former allows saving material volumes and reducing the structural weight, the latter confers unprecedent durability. However, one of the...
Chapter
Full-text available
In this paper, the sorption behavior of Ultra High-Performance Fiber Reinforced Concrete (UHPFRC) is experimentally investigated. As UHPFRC has a very low permeability, the sorption measurement presents an interesting challenge and has required the modification and optimization of the Dynamic Vapor Sorption Method (DVS) already applied for ordinary...
Article
In this study, the importance of capillary suction was emphasized through its implementation in a hygrothermal transport model used to predict water transport in ordinary concrete. In the model, heat transfer is described by the classical Fourier equation. In addition, the homogeneous vapor diffusion is modeled using a gradient-driven Fick's law, a...
Article
We demonstrate that azobenzene dye molecules, such as Methyl Orange (MO) and Acid Yellow 9 (AY9), can be used to control the motility of flagellar bacteria E. coli. The behaviour of bacteria is studied when dye molecules are photoexcited between trans and cis states. We show that the speed of bacteria can be changed by light up to +23 % and -45 %,...
Article
Conventional de-icing methods with salts and snow removal causes considerable maintenance cost and outstanding indirect costs due to corrosion of the steel reinforcement of concrete infrastructures. Alternatively, heating systems based on Electrically Conductive Concrete (ECC) have been lately developed to reduce operational and reparation cost. Th...
Article
Cross-Laminated Timber (CLT) structures have been emerging worldwide for residential floors in multi-storey buildings thanks to their lightness, fast construction and low ecological footprint. This work aims at fostering this application, which is often limited by vibrational and deflection limits, by investigating composite slab floors made of CLT...
Article
A recent survey has showed that predicting the long-term deflection of existing concrete bridges after several decades is a great concern in civil engineering. The crux is to predict the creep deflection of a concrete structure after several decades from laboratory tests carried out over few months. This work aims at combining microindentation test...
Article
Aluminum Spent Pot lining (SPL) is an industrial hazardous waste generated from aluminum electrolysis cells. The SPL separates in two parts, the first cut is rich in carbonaceous materials and the second cut is rich in vitrified refractory. Treating second cut SPL by the Low Caustic Leaching and Liming (LCL&L) process generates an inert non-hazardo...
Article
The costs to maintain Québec’s infrastructure—most of which was built in the 1960s and 1970s—are considerable, and major maintenance and reconstruction will be required in the coming years. In recent years, aluminum associations promote the increase of aluminum use in infrastructure and especially in bridge construction. This research aims to inves...
Conference Paper
Spent pot lining (SPL) is an industrial waste generated from aluminum electrolysis cells. LCLL-ash is the inert by-product coming from the treatment of the SPL refractory fraction at the SPL treatment plant (Jonquière, Canada). LCLL-ash has been ground to the fineness of the cement to substitute a part of cement in cement pastes. However, LCLL-ash...
Article
Microindentation is today a powerful tool for rapidly characterizing the elastic modulus and the logarithmic basic creep of a cement paste. However, a theoretical work proved that a microindentation test with a sharp indenter shape involves stress concentration and delayed plasticity which can cause an overestimation of the estimated creep property...
Article
Tobermorite is a natural mineral found in the microstructure of special concretes, such as autoclaved concrete and oil well cement, and along with jennite has been extensively studied for their analogy to the layered atomic structure of C–S–H. By employing creep microindentation tests, which allow measuring the logarithmic creep, this work aims at...
Conference Paper
About 20 kt Spent Pot Lining (SPL) is generated by Rio Tinto in Québec each year from aluminum electrolysis cells and listed as industrial hazardous waste. After treatment by the Low Caustic Leaching and Liming (LCL&L) process, the refractory SPL becomes an inert non- hazardous material, called LCLL ash. The project discussed aims to valorize this...
Article
Timber-Concrete Composite (TCC) structures allow taking synergistic advantage of the properties of both materials to optimize the overall performances in terms of lightness, slenderness, acoustic insulation, vibrational behaviour and environmental footprint. In the last years, ductile shear connectors have been developed to allow the structural duc...
Article
The durability of concrete structures strongly depends on the water and chloride penetration in cracked concrete during its service life. This work aims at modeling the damage effect of tension stiffening behavior on the permeability for concrete tie specimen under tensile load by a dual lattice model, which considers hydromechanical couplings. Thr...
Article
Owing to the micrometric size of the probed volume and the minute duration of a test, microindentation provides a unique tool to characterize the non-aging creep properties of a cement paste in hygral equilibrium. Microindentation techniques have been emerging as rapid technique to characterize the logarithmic creep rate of cement pastes. The objec...
Article
While several works have investigated the effect of temperature on concrete creep, the effect of thermal activation on the multiple creep mechanisms is not fully understood. This work aims at investigating the thermal effect on the creep rate of cement pastes with different water-to-binder ratios (w/b) by microindentation technique. Firstly, severa...
Article
Different kinds of ductile connectors have been lately developed for enhancing the structural ductility of Timber-Concrete Composite (TCC) structures. In particular, ductile notch connections can be designed by favoring the local compression failure of wood fibers. This work aims at further developing economic and ductile notch connector by conside...
Article
The transport of chloride ions in concrete structures is not only due to diffusion but also to the advective effects of water movements and capillarity, mostly present with wet-dry cycles. These last two phenomena are currently very poorly modelled. A new system based on optical fibres was previously developed to measure the free chloride concentra...
Article
Electrically Conductive Cementitious Composites (EC3) have been developed in the last decades to solve the drawbacks of conventional de-icing solutions, especially for urban regions with heavy snowfall where the cost of snow removal and accidents have been considerably increasing. This work aims at developing Electrically Conductive Concrete (ECC)...
Article
Full-text available
Ultrahigh-performance fiber-reinforced concrete (UHPFRC) is endowed with outstanding durability. The first results of accelerated migration tests with an adapted procedure highlighted a very low chloride permeability profiles for undamaged UHPFRC with organic and metallic fibers. However, some of the samples with steel fibers showed useless results...
Article
Timber-concrete composite (TCC) structures provide a breakthrough solution for multi-storey buildings. Besides the importance of the connection stiffness, recent research has focused on ductile connectors. This work aims at developing an economic new cast-in-place connector to guarantee the suitable stiffness and structural ductility. A new composi...
Article
The development of Ultra-High Performance Concrete (UHPC) opened new research directions for enhancing the architectural design, sustainability and serviceability of concrete structures. However, the costs and resource intensiveness trigger the need for innovative UHPC mix design incorporating alternative materials, such as post-consumption Glass P...
Conference Paper
The ever-increasing need to maintain aging existing reinforced concrete structures, especially in severe winter environments, in good condition and a cost-effective manner arises mainly in structural health monitoring methods, where it is necessary to adopt approaches that allow early detection of corrosion. Chloride-induced corrosion is a signific...
Article
The study of the early-age behavior of Timber-Concrete Composite (TCC) structures is of great interest as it provides valuable information for manufacturing specification development, quality control, and optimization of the formwork design. In this study, the results of the continuous monitoring of the short-term behavior of TCC slabs using Brillo...
Article
Timber-Concrete Composite (TCC) structures are emerging worldwide in several civil engineering applications as an effective construction system in terms of structural stiffness and strength, lightness and vibrational behavior. This work aims at fostering an innovative TCC solution for residential floors that combines a thin slab of Ultra-High Perfo...
Article
Full-text available
Sustainability decision making is a complex task for policy makers, considering the possible unseen consequences it may entail. With a broader scope covering environmental, economic, and social aspects, Life Cycle Sustainability Assessment (LCSA) is a promising holistic method to deal with that complexity. However, to date, this method is limited t...
Conference Paper
Full-text available
Nanomaterials are currently attracting a rising research attention in versatile realms including the concrete industry. Thus, the promising properties of nanocellulose materials (NCM) are expected to unveil new horizons for enhancing concrete performance. This paper discusses the perspectives of using NCM for tailoring the properties of cement comp...
Article
Accelerated migration tests which are commonly used to measure chloride diffusion in ordinary cement-based materials cannot be directly applied to composite with very low permeability, such as Ultra High-Performance Fiber Reinforced concretes (UHPFRC). In order to assess the UHPFRC enhancement on the structural durability, there is a critical need...
Article
Full-text available
This work aims to present a complete full coupling eXtended finite element formulation of the thermo-mechanical problem of cracked bodies. The basic concept of the extended finite element method is discussed in the context of mechanical and thermal discontinuities. Benchmarks are presented to validate at the same time the implementation of stress i...
Article
Plastic waste is today an crucial environmental issue for which innovative recycling techniques are needed. This research aims at investigating the feasibility of replacing fine aggregate in concrete by recycled plastics from real post-consumer streams. Different kind of plastics were sorted in Material Recovery Facilities (MRF) to realize differen...
Conference Paper
Ultra-High Performance Fiber Reinforced Concrete, unlike conventional concrete, shows a remarkable tensile strength which is paramount for guaranteeing the crack resistance and durability. However, tensile tests on UHPFRC are not widely employed due to the difficulty to guarantee uniform tensile stress during the entire loading. To overcome this di...
Article
Current demand for novel highly sustainable concrete urges improving the links between chemical and mechanical effects of supplementary cementitious materials (SCMs) on the microstructure of blended-cement pastes. In this work, coupled NanoIndentation and Quantitative Energy Dispersion Spectroscopy (NI-QEDS) was applied to disclose chemo-mechanical...
Article
Recent studies have showed that microindentation techniques allow assessing the logarithmic creep rate of a cement paste in good correlation with the long-term creep rates measured by compressive tests at macroscopic scale. After having applied microindentation techniques to characterize the effect of relative humidity (RH) on both the creep and re...
Conference Paper
A better understanding of the microstructural features of cement matrices incorporating supplementary cementitious materials (SCMs) represents key knowledge for engineering more sustainable concrete infrastructures. By fostering the coupling of nanoindentation techniques with quantitative energy-dispersive X-ray spectroscopy (NI-QEDS), this work ai...
Article
Alkali-silica reaction (ASR) is a major issue for the durability of concrete structures worldwide. Fostering recent microindentation works on the elastic property of ASR products, this work aims at further characterizing their viscous property. In particular, this study focuses on the relaxation behaviour of ASR crystalline products which are prefe...
Article
Engineering cement-based composites requires a comprehensive understanding of the microstructure features governing macroscopic properties. This work aims to foster the latest chemo-mechanical technique to disclose the micro-mechanical properties of intimately intermixed phases. Considering a typical Portland cement paste as a study case, we compar...
Article
This study investigated mechanical properties of biocomposites developed from recycled polylactic acid (PLA) from packaging industry and treated cellulosic fibers from pulp and paper solid waste. Microwave and enzymatic treatments were used for extraction and surface modification of hydrophilic cellulosic fibers. Enzymatic treatment was specificall...
Article
Structural design with highly flowable Fibre Reinforced Concrete has to duly take into account the preferential alignment of fibers, which can be governed through the rheological properties of the fluid mixture and the casting process and by the geometry of the structure. The possibility of predicting the fiber alignment, by tailoring the casting p...
Conference Paper
Crack propagation in carbon cathode used in the aluminium industry has been investigated through flexural tests on notched specimens. The main parameters of interest were the geometrical evolution of the crack and the stress intensity factor at the tip ends. The latter, in the case of interfacial fracture in two-dimensional geometries, can be relat...
Article
A recent survey has revealed that the deflection of concrete bridges increases incessantly over a period of more than 20years and can exceed by far the predictions of current design recommendations. This work applies microindentation techniques, which allow quickly assessing the long term rate, to investigate the effect of relative humidities on bo...
Article
Timber-concrete composite (TCC) structures have been emerging in several industrial applications due to potential to simultaneously optimize their structural stiffness, dynamic vibration and ecological imprint. However, when one considers nonlinear behaviour of timber-to-concrete connections and the cracking of the concrete slab, the structural ana...
Conference Paper
Full-text available
Ultra High Performance Fiber Reinforced Concrete (UHPFRC) structures are emerging in several engineering applications as their outstanding tensile strength and ductility allow engineers to develop new structural concepts and overcome construction limits. Optimization of the UHPFRC fiber ratio, which has significant economic and technical relevance,...
Chapter
Results of the evaluation of a new bioproduct produced through fermentation of a mixed culture of microorganisms as a plasticizer in concrete are presented. The product, generically known as the Efficient Microorganism (EM) has proven potential for use as chemical admixture in concrete. The product, in a diluted version, shows a moderate plasticizi...
Conference Paper
Delayed deformations in concrete under sustained loading may depend on complex chemo-hydro-mechanical phenomena. Generally, the creep deformation of a cement paste is distinguished in the short-term and long-term. Simply speaking, the former can be associated to the diffusion of gel water in pores and cracks and it is mainly volumetric (i.e., volum...
Article
Full-text available
The mechanical properties of azobenzene-containing polymer films are statistically measured by instrumented nanoindentation experiment in the dark and under illumination in the absorption band of the azobenzene molecules, with special emphasis on the creep behavior and recoverability. We use Dispersed Red 1 azobenzene derivatives, which remain in t...
Article
The mechanical properties of concrete produced with effective microorganisms (EM)-based bioplasticizer are investigated by means of statistical nanoindentation, and compared to the nanomechanical properties of concrete produced with ordinary superplasticizer (SP). The resort to nanoindentation enables to survey the elasticity, hardness and long-ter...
Article
Full-text available
Les structures en BFUP font leur apparition dans de nombreuses applications d'ingénierie grâce à l’excellente résistance en traction de ces matériaux, qui permet aux ingénieurs de développer de nouveaux concepts de structure et de dépasser les limites de construction actuelles. Ce document met l'accent sur l'analyse structurelle d'une nouvelle pass...
Conference Paper
Full-text available
This work aims to characterize the creep behavior of the major microstructure constituents of cement paste by means of a novel approach which combines Nanoindentation Technique (NT) and Scanning Electron Microscopy with X-ray microanalysis (SEM-EDS). We first performed a large grid of nano-indentation tests on different cement paste samples. The te...
Article
The durability of concrete materials with regard to early-age volume changes and cracking phenomena depends on the evolution of the poroelastic properties of cement paste. The ability of engineers to control the uncertainty of the percolation threshold and the evolution of the elastic modulus, the Biot–Willis parameter and the skeleton Biot modulus...
Article
Since 2002, ultra high performance fiber-reinforced concretes (UHPFRC) have been increasingly applied. They have also been the focus of extended research efforts worldwide. The results of these works have served as the background for updating the Association Française de Génie Civil(AFGC) recommendations, in addition to rewriting of the part devote...
Article
In order to reduce CO 2 emissions, the cement industry has developed a new class cements. The Calcium-Silicate-Hydrates (C S H) that form are generally characterized by a low stoichiometric ratio for CaO and SiO 2. This low C/S ratio affects the C-S-H layer structure and has a significant effect on the mechanical properties. This work exploits a no...
Article
A low water/cement ratio (w/c = 0.20) hydrated Portland cement paste was analyzed by grid-indentation coupled with ex-situ SEM-EDS analysis at each indentation point. Since finite element and Monte-Carlo simulations showed that the microvolumes probed by each method are of comparable size (approximately 2 µm), the mechanical information provided by...
Article
Advances in engineering the microstructure of cementitious composites have led to the development of fiber reinforced Ultra High Performance Concretes (UHPC). The scope of this paper is twofold, first to characterize the nano-mechanical properties of the phases governing the UHPC microstructure by means of a novel statistical nanoindentation techni...
Article
Recent progress in nanoscience and technology makes it possible to assess the mechanical properties of cement based materials at the nanoscale and to identify the universal material properties. In this paper, we apply for the first time a novel statistical nanoindentation technique to identify the nano-mechanical properties of a class of ultra high...
Article
Innovative cementitious composites endowed with strain hardening behavior, namely UHPFRC, have been successfully employed in several industrial applications, such as bridge engineering and nuclear waste container prototypes, where the crack impact on the durability is of main concern. However, the material ductility of such composites exhibits a co...
Article
An extensive experimental investigation with the aim of studying the structural behavior of slabs on ground made of steel fiber-reinforced concrete (SFRC) is presented in this paper. Several full-scale slabs reinforced with different volume fractions of steel fibers having different geometries were tested under a point load in the slab center. A hy...