References of "Delvoie, Simon"
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See detailMicrowave radiation as a pre-treatment for standard and innovative fragmentation techniques in concrete recycling
Everaert, Maarten; Stein, Raphael; Michaux, Simon et al

in Materials (2019), 12(3),

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See detailMarket analysis of recycled sands and aggregates in North-West Europe: drivers and barriers
Delvoie, Simon ULiege; Zhao, Zengfeng ULiege; Michel, Frédéric ULiege et al

in Conference Series Earth and Environmental Science (2019, February)

Construction and demolition wastes (C&DW) are estimated at one third of total wastes generated in the European Union (EU) and represent the main flux in volume. Inert materials (e.g. concrete, bricks ... [more ▼]

Construction and demolition wastes (C&DW) are estimated at one third of total wastes generated in the European Union (EU) and represent the main flux in volume. Inert materials (e.g. concrete, bricks, tiles and ceramics) constitute the largest fraction of construction and demolition wastes. These wastes can be recovered as secondary raw materials after a recycling process resulting in the production of recycled sands and aggregates. The market for recycled sands and aggregates is however complex and sensitive. It can be affected by many parameters and may be very variable from one region to another, even in the same country. A quantitative analysis of some market variables is carried out in five NW European countries: Belgium, France, Germany, Luxembourg and the Netherlands. For achieving this analysis, attention is paid to the following data/parameters: generation of inert construction and demolition wastes, production of recycled sands and aggregates and production of natural sands and aggregates. Since the market of recycled products is also governed by transportation costs (mainly transported by road), the study has also compiled data on the density of recycling plants for construction and demolition wastes, the density of pits and quarries extracting natural materials, the density of inert landfills and taxes applied for C&DW landfilling. National/regional legislation and requirements are also included in the analysis. Based on the compiled data and objective reasons, the market of recycled sands and aggregates is more developed and more suitable in the Netherlands and in Flanders (North of Belgium) than in the other investigated countries/regions. [less ▲]

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See detailOptimizing performances of recycled aggregates for improving concrete properties
Courard, Luc ULiege; Tabarelli, Enrico ULiege; Michel, Frédéric ULiege et al

in Proceedings SMSS 2019 (2019)

Construction waste management is a quite important economic and environmental deal for our societies. More than 2 million tons demolition and construction wastes are annually produced only in Wallonia ... [more ▼]

Construction waste management is a quite important economic and environmental deal for our societies. More than 2 million tons demolition and construction wastes are annually produced only in Wallonia, Southern Region of Belgium: recycling has clearly to be promoted and by products to be valorised as secondary raw materials. The influence of the fine recycled concrete aggregates (FRCA) on the mechanical and durability properties of concrete was used for producing concrete. Concretes with different substitution rates (0, 30 and 100%) of natural sand by the FRCA were manufactured. Mechanical properties (compressive strength) and durability properties (capillary absorption, carbonation depth, and freeze/thaw resistance) were investigated. The results show that the compressive strength of concrete decreased as the substitution of FRCA increased. Durability of concrete could be strongly influenced by the high porosity and water absorption of fine recycled concrete aggregates. Brick fillers (BF) have also been studied for producing Self Compacting Mortars (SCM): introduction of 50 and 100% substitution clearly show a reduction of workability properties if particles water absorption is not taken into account. However, mechanical properties at 7 and 28 days didn’t show a clear impact of the substitution of limestone filler by brick filler. [less ▲]

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See detailState of the art on recycling techniques for the production of recycled sands and aggregates from construction and demolition wastes
Delvoie, Simon ULiege; Zhao, Zengfeng ULiege; Michel, Frédéric ULiege et al

in Nguyen, T.T.; Waldmann, D.; Venditti, S. (Eds.) Circular Concrete - SeRaMCo - Secondary Raw Materials for Concrete Precast Products (2018, November)

Construction and demolition wastes (C&DW) are estimated at one third of total wastes generated in the European Union (EU) and represent the main flux in volume. These wastes can be recycled in suitable ... [more ▼]

Construction and demolition wastes (C&DW) are estimated at one third of total wastes generated in the European Union (EU) and represent the main flux in volume. These wastes can be recycled in suitable recycling facilities which include a series of techniques able to crush and sort materials to finally produce recycled sands and aggregates with required properties. Common sorting techniques consist in ferrous metal sorting, hand-picking sorting and washing or air shifting sorting. Crushing is usually carried out by an impact or a jaw crusher and less frequently by a cone crusher. A combination of different crushers is also common for stationary recycling plants. In order to continuously improve the quality of the produced recycled materials, results obtained from innovative recycling techniques are also increasingly documented in literature. Some of the main innovative techniques related to C&DW recycling purposes are introduced in the study. [less ▲]

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See detailUtilisation des sables et granulats recyclés dans le béton préfabriqué : comparaison des exigences réglementaires et techniques en Europe
Delvoie, Simon ULiege; Zhao, Zengfeng ULiege; Michel, Frédéric ULiege et al

Conference (2018, November)

L’utilisation des sables et granulats recyclés dans le béton préfabriqué est encore peu fréquente sur le plan industriel, et ce malgré les nombreuses recherches menées sur ce sujet. Dans un premier temps ... [more ▼]

L’utilisation des sables et granulats recyclés dans le béton préfabriqué est encore peu fréquente sur le plan industriel, et ce malgré les nombreuses recherches menées sur ce sujet. Dans un premier temps, cette étude fait le point sur les législations et les réglementations prises par les différents pays du nord-ouest de l’Europe (Allemagne, Belgique, France, Luxembourg et Pays-Bas) en vue de favoriser le recyclage et la valorisation des sables et granulats recyclés issus des déchets de construction et de démolition. Ces pays disposent d’un cadre législatif et réglementaire développé leur permettant d’atteindre l’objectif fixé par la Directive européenne 2008/98/CE visant à recycler et valoriser au moins 70% des déchets non dangereux de construction et de démolition en 2020. Le cadre normatif, en lien avec la production de béton préfabriqué et l’utilisation de sables et granulats recyclés, est ensuite analysé. Les principales normes européennes concernées sont : EN 206:2013+A1:2016 (béton), EN 13369:2018 (produits préfabriqués en béton) et EN 12620:2013 (granulats pour béton). Ces normes ont été, selon les cas, complétées ou non par des annexes nationales. Une attention est portée à la comparaison des différentes normes entre les pays du nord-ouest de l’Europe. Cette analyse comparative se penche (i) sur les taux de substitution maximum définis par la norme EN 206:2013+A1:2016 et les annexes nationales, ainsi que (ii) sur les caractéristiques que doivent avoir les granulats recyclés pour pouvoir être incorporés dans le béton. Les normes belge et française semblent plus restrictives vis-à-vis du taux de substitution maximum par rapport aux autres normes étudiées, tandis que les normes belge et luxembourgeoise semblent plus contraignantes concernant les caractéristiques que doivent avoir les granulats recyclés pour pouvoir être utilisés dans le béton. [less ▲]

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See detailEffects of limestone filler on the behaviour of recycled aggregate concrete
Zhao, Zengfeng ULiege; Courard, Luc ULiege; Michel, Frédéric ULiege et al

Scientific conference (2018, August 26)

According to the concept of sustainable development, sustainable construction is becoming a hot topic. Large amounts of construction and demolition wastes, especially concrete wastes, are generated ... [more ▼]

According to the concept of sustainable development, sustainable construction is becoming a hot topic. Large amounts of construction and demolition wastes, especially concrete wastes, are generated annually. Meanwhile, large quantities of natural aggregates are needed for the construction of roads, buildings or civil engineering infrastructures. Until now, only a small part of concrete wastes is re-used as recycled concrete aggregates (RCA) in the manufacture of mortar and concrete. The issue of recycling construction and demolition wastes in the concrete industry has been widely explored by many researchers. RCA are mainly composed of an intimate mix between natural aggregates and adherent hardened cement paste or mortar. The later possesses a large water demand which makes it harder to recycle into concrete than natural aggregates. Limestone powder, which is a by-product of calcareous aggregate production, if not used, has to be disposed of in the landfills at a considerable cost. In this paper, the effect of limestone filler on the properties of recycled aggregate concrete (RAC) was studied. Recycled aggregates were produced in the laboratory from the crushing of concrete blocks and were then used as aggregates into new concretes. Concretes were manufactured by adding different percentages of limestone filler (0%, 10% and 20% of the mass of cement) and by replacing 30% of natural aggregate with recycled aggregates. Then, fresh properties and mechanical properties of these concretes were investigated. The results showed that the compressive strength of concrete with the addition of 10% limestone was 47.2 MPa after 28 days, which was larger than the reference concrete (43.1 MPa). [less ▲]

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See detailFeasible use of construction and demolition waste in concrete production: SeRaMCo project
Zhao, Zengfeng ULiege; Delvoie, Simon ULiege; Michel, Frédéric ULiege et al

Conference (2018, August 09)

About 850 million tons of construction and demolition waste (C&DW) are produced yearly in European Union. The Waste Framework Directive 2008/98/EC aims to a minimum target of reuse, recycling, and ... [more ▼]

About 850 million tons of construction and demolition waste (C&DW) are produced yearly in European Union. The Waste Framework Directive 2008/98/EC aims to a minimum target of reuse, recycling, and material recovery of non-hazardous C&DW at 70% by weight until 2020. Recycling of C&DW is quite important and has to be promoted. Up to now, most of recycled C&DW has been used as a base and sub-base materials in road construction, while only a small quantity of C&DW is reused in concrete. Interreg North-Western Europe project SeRaMCo (Secondary Raw Materials for Concrete Precast Products) aims to replace primary raw materials with the high-quality materials recycled from C&DW, e.g. concrete, bricks, tiles and ceramics (CBTC), in production of the cement and concrete products for use in North-Western Europe. To attain this goal, the project will: a) analyse and improve sorting of C&DW; b) develop and test new concrete mixes and technologies for the production of concrete precast products (CPPs) made from the recycled CBTC; c) establish a market niche for CPPs, leading to the economic advantages for the producers and generating new jobs in the construction sector. [less ▲]

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See detailWPT1 - Market analysis and formal regulations in NWE
Delvoie, Simon ULiege; Zhao, Zengfeng ULiege; Michel, Frédéric ULiege et al

Report (2018)

In the European Union construction and demolition wastes are estimated at one third of all wastes generated and represent the main flux in volume. Inert materials (e.g. concrete, bricks, tiles and ... [more ▼]

In the European Union construction and demolition wastes are estimated at one third of all wastes generated and represent the main flux in volume. Inert materials (e.g. concrete, bricks, tiles and ceramics) constitute the largest fraction of construction and demolition wastes. However these wastes can be recovered as secondary raw materials after a recycling process resulting in the production of recycled sands and aggregates. An in-depth market analysis of recycled sands and aggregates in NW European countries (Belgium, France, Germany, Luxembourg and the Netherlands) has been performed in the framework of the Interreg NWE project SeRaMCo (Secondary Raw Materials for Concrete precast products). Market of recycled sands and aggregates is complex to understand. It can be affected by many parameters and may be very variable from one region to another, even in the same country. To achieve this analysis, attention has been paid to the following data/parameters: generation of inert construction and demolition wastes, production of recycled sands and aggregates and production of natural sands and aggregates. Since the market of recycled products is also governed by transportation costs (mainly transported by road), the study has also compiled data on the density of recycling plants for construction and demolition wastes, the density of pits and quarries extracting natural materials, the density of inert landfills and taxes applied for CDW landfilling. National/regional legislation and requirements have also been included in the analysis. [less ▲]

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See detailProperties of concrete with recycled construction and demolition wastes: a research experience in belgium
Zhao, Zengfeng ULiege; Courard, Luc ULiege; Michel, Frédéric ULiege et al

in Xiao, Jianzhuang (Ed.) Sustainable Structures and Materials (2018)

Construction waste management is a quite important economic and environmental deal for our societies. More than 2 million tons demolition and construction wastes are annually produced only in Wallonia ... [more ▼]

Construction waste management is a quite important economic and environmental deal for our societies. More than 2 million tons demolition and construction wastes are annually produced only in Wallonia, Southern Region of Belgium; recycling has clearly to be promoted. Concrete block wastes were crushed in the laboratory by a jaw crusher and the different fractions of laboratory produced RCA were characterized by measuring the hardened cement paste content, the density, the porosity and the water absorption. Results clearly show that, the recycled sands possessed significantly higher cement paste content and higher water absorption than coarse RCA. Then, concrete blocks with different substitutions (0%, 30%, 100%) of natural aggregate by the same volume fraction of RCA were manufactured. The fresh properties (slump, density, air content), and mechanical properties (compressive strength) were studied. The compressive strength of concrete decreased as the substitution of RCA increased. Results show that the compressive strength of concrete made with 100% RCA could reach 8 MPa after 28 days. Therefore, the use of RCA obtained from old block wastes in the production of new blocks can be envisaged depending on their class of exposure and the grade requirement. Moreover, the influence of the fine recycled concrete aggregates (FRCA) on the mechanical and durability properties of concrete was studied. The industrial FRCA produced from recycling center was used into concrete. The concretes with different substitutions (0%, 30%, 100%) of natural sand by the FRCA were manufactured. Mechanical properties (compressive strength) and durability properties (capillary absorption, carbonation depth, and freeze/thaw resistance) were investigated. The results show that the compressive strength of concrete decreased as the substitution of FRCA increased. Durability of concrete could be strongly influenced by the high porosity and water absorption of fine recycled concrete aggregates. [less ▲]

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See detailINCREASING PROPERTIES OF CONCRETE WITH RECYCLED CONSTRUCTION AND DEMOLITION WASTES
Courard, Luc ULiege; Michel, Frédéric ULiege; Bouarroudj, Karim et al

in Betoni z Izboljsanimi lastnostmi (2018)

Construction waste management is a quite important economic and environmental deal for our societies. More than 2 million tons demolition and construction wastes are annually produced only in Wallonia ... [more ▼]

Construction waste management is a quite important economic and environmental deal for our societies. More than 2 million tons demolition and construction wastes are annually produced only in Wallonia, Southern Region of Belgium; recycling has clearly to be promoted. Concrete block wastes were crushed in the laboratory by a jaw crusher and the different fractions of laboratory produced RCA were characterized by measuring the hardened cement paste content, the density, the porosity and the water absorption. Results clearly show that, the recycled sands possessed significantly higher cement paste content and higher water absorption than coarse RCA. Then, concrete blocks with different substitutions (0%, 30%, 100%) of natural aggregate by the same volume fraction of RCA were manufactured. The fresh properties (slump, density, air content), and mechanical properties (compressive strength) were studied. The compressive strength of concrete decreased as the substitution of RCA increased. Results show that the compressive strength of concrete made with 100% RCA could reach 8 MPa after 28 days. Therefore, the use of RCA obtained from old block wastes in the production of new blocks can be envisaged depending on their class of exposure and the grade requirement. Moreover, the influence of the fine recycled concrete aggregates (FRCA) on the mechanical and durability properties of concrete was studied. The industrial FRCA produced from recycling center was used into concrete. The concretes with different substitutions (0%, 30%, 100%) of natural sand by the FRCA were manufactured. Mechanical properties (compressive strength) and durability properties (capillary absorption, carbonation depth, and freeze/thaw resistance) were investigated. The results show that the compressive strength of concrete decreased as the substitution of FRCA increased. Durability of concrete could be strongly influenced by the high porosity and water absorption of fine recycled concrete aggregates [less ▲]

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See detailCaractérisation multiéchelle du loess de Hesbaye (Belgique) par une approche couplée géologique et géotechnique
Delvoie, Simon ULiege

Doctoral thesis (2017)

A thorough analysis is performed on aeolian silt (loess) deposits. The study is based on an original approach combining geological aspects with physical and mechanical properties of the material. This ... [more ▼]

A thorough analysis is performed on aeolian silt (loess) deposits. The study is based on an original approach combining geological aspects with physical and mechanical properties of the material. This approach is realized by means of a multiscale experimental analysis in which cone penetration test plays a key role. The approach is applied to the study of loess deposits located in the Hesbaye region (Belgium), in which the site of the Romont quarry (Eben-Emael, Belgium) is the subject of a more comprehensive and a more detailed study. About the stratigraphic aspects, a continuous geological cross-section performed along a 18 km long section of the high-speed railway between Liège and Waremme, underlines the variability of the thickness of the loess layer which can locally reach 20 m. The loess sequence is further investigated in three Hesbayan sites (Remicourt, Romont and Rocourt) with cone penetration test (CPT) campaign. The analysis of the cone resistance of the CPT reveals it is possible to define four stratigraphic markers within the regional loess sequence: the near surface decarbonation limit, the transition between the Nagelbeek Tongued Horizon and the underlying Hesbayan loess, the Humiferous Complex of Remicourt, and the Whitish horizon of Momalle on top of the Rocourt Pedocomplex. Physical, geochemical and microstructural characteristics determined from laboratory analyses on samples stratigraphically located around the stratigraphic markers, enable a better understanding of the observed variations of the in situ mechanical behaviour. Porosity, volumetric weight and clay content seem to be three major variables in the understanding of the observed variations of cone resistance. A comparative analysis of geomechanical properties has also been conducted either from different data related to CPT or between CPT results and laboratory measurements. This study includes four items: (i) the comparative analysis of measurements achieved by different CPT cone types (M1, M2 and E), clearly indicates the cone type has negligible influence on the measured cone resistance for silty material. (ii) Soil behaviour type charts based on CPT data confirm the relative heterogeneity of the investigated silty material. (iii) The empirical relation between the oedometric modulus and the cone resistance of the CPT, including the α factor depending on the soil type, is verified for the studied silty material. (iv) A semi-empirical approach based on the bearing capacity theory has been developed to estimate mean apparent cohesion and friction angle of the silt. Finally, results of this PhD thesis may be used for specific and original applications: (i) CPT testing seems to be an interesting investigation technique for rescue archaeology in loess context. (ii) Thanks to the in-depth investigation, the Romont site (Belgium) may provide an interesting site wherein sensors or investigation tests related to geomechanical, physical or structural properties of the material may be tested or calibrated into a natural silty medium. (iii) The detailed characterisation of aeolian silt leads to numerous properties related to geomechanical, physical and geochemical aspects of the material. These data may be used in studies dealing with loess deposits. [less ▲]

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See detailFractured bedrock investigation by using high-resolution borehole images and the Distributed Temperature Sensing technique
Radioti, Georgia ULiege; Delvoie, Simon ULiege; Radu, Jean-Pol ULiege et al

in ISRM Congress 2015 Proceedings - Int’l Symposium on Rock Mechanics (2017)

In order to investigate the fracturing of the bedrock and its possible heterogeneous distribution in situ, four boreholes equipped with double-U geothermal pipes of 100 m long were installed on the campus ... [more ▼]

In order to investigate the fracturing of the bedrock and its possible heterogeneous distribution in situ, four boreholes equipped with double-U geothermal pipes of 100 m long were installed on the campus of the University of Liege (Liege, Belgium) over a surface area of 32 m². The bedrock, which starts at a depth approximately of 8 m, is quite fractured and consists mainly of siltstone and shale interbedded with sandstone. Different geophysical methods are applied at two different phases, after drilling the boreholes and after injecting the grouting material. The first approach consists in lowering an ultrasonic borehole imager (borehole televiewer; Zemanek, Glenn, Norton, & Caldwell, 1970), an instrument that acts as an ultrasonic transducer and receiver, into the boreholes to obtain high-resolution, continuous images with 360° coverage of the local geology and fracturing. Moreover gamma-ray logs of the four boreholes are obtained and inclinometry is conducted. After drilling the boreholes fiber optic cables are attached along the pipe loops and the double-U pipes are installed inside the boreholes. Then the grouting material is injected. The second approach consists in measuring the temperature along the fibers by applying the Distributed Temperature Sensing technique (Soto, Sahu, Faralli, Bolognini, Di Pasquale, Nebendahl, & Rueck, 2007). A laser pulse is injected into the optical fiber and the temperature along the fiber is determined by the intensity of Raman stokes and anti-stokes reemitted signals. Temperature evolution is measured during hardening of the grouting material. Local maxima of the temperature curve are probably due to a local lower thermal conductivity and/or a local larger quantity of grouting material due to gathering of fractures. A detailed fracture characterisation (position, opening, orientation, dip angle) is obtained based on the acoustic signal travel time and amplitude. The fractures are characterised by the same dipping and orientation but significantly vary in number and location in the four boreholes, despite the close distance between them. Gamma-ray data and observation of the cuttings during drilling result in rock identification through depth as well as in determination of the layer dipping. The inclination of the four boreholes tends to be perpendicular to the dipping. The combination of the two geophysical methods as presented provides information useful for the hydro-thermo-mechanical behaviour of the bedrock. The contribution of the thermal behaviour of borehole heat exchangers to bedrock investigation will be further studied by conducting Distributed Thermal Response tests (Fujii, Okubo, & Itoi, 2006). During the tests we will measure the temperature variation thanks to the installed fiber optics. These data will allow us to correlate any anisotropic thermal behaviour to the geological characteristics. The available information could be used for a detailed numerical model. [less ▲]

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See detailDetailed characterization of the Late Pleistocene loess sequence stratigraphy of Remicourt (Hesbaye region, Belgium) with cone penetration tests
Delvoie, Simon ULiege; Boulvain, Frédéric ULiege; Charlier, Robert ULiege et al

in Geologica Belgica (2016), 19(3-4), 281-289

Cone penetration tests (CPT) and drilling results are used to characterize the Middle Belgium loess sequence. A two scale study has been realized in the Hesbaye region (Belgium). The study on a regional ... [more ▼]

Cone penetration tests (CPT) and drilling results are used to characterize the Middle Belgium loess sequence. A two scale study has been realized in the Hesbaye region (Belgium). The study on a regional scale was performed along a 18 km long section of the high-speed railway Liège-Brussels. About 230 tests were compiled. Results show the loess thickness is very variable and can locally reach 20 m. Tertiary deposits become continuous and they rapidly thicken from Waremme to the West. The lower surface of the Tertiary deposits is characterized by a 0.3% apparent dipping to the NW. The dipping likely results from the Ardenne Massif uplift. The local scale study focuses on the site of Remicourt located along the high-speed railway. 24 CPT tests have been carried out very close to a series of archaeological trenches. The analysis shows penetrometers are able to define some stratigraphic markers within the loess layer. The most identifiable marker is stratigraphically located around the transition between the Humiferous Complex of Remicourt and the Rocourt Pedocomplex. The lens-shape of the loess ridge is also confirmed by the penetrometers’ interpretation. Furthermore, the 3D morphology of each stratigraphic marker can be estimated. These results offer interesting perspectives for the investigation of the loess sequence related to archaeological applications. [less ▲]

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See detailSynthèse des données gétechniques nécessaires à l'étude de la stabilité de cinq terrils à risque en région wallonne - phase2
Delvoie, Simon ULiege; Collin, Frédéric ULiege

Report (2016)

Dans le cadre d’un recensement des terrils situés en Région wallonne et pouvant présenter des risques de stabilité sur le court et le long terme, l’ISSeP a chargé le Laboratoire de Géotechnologies de ... [more ▼]

Dans le cadre d’un recensement des terrils situés en Région wallonne et pouvant présenter des risques de stabilité sur le court et le long terme, l’ISSeP a chargé le Laboratoire de Géotechnologies de l’Université de Liège, représenté par Ir. F. COLLIN et S. DELVOIE, de réaliser une étude géotechnique préliminaire. Les objectifs de ce travail sont tout d’abord de recenser les informations disponibles sur le sous-sol aux environs immédiats des terrils. Les données recueillies sont ensuite exploitées par des outils informatiques SIG et seront par la suite utilisées dans l’évaluation du risque d’instabilité, réalisée par l’ISSeP. Ce travail documentaire est également complété par une inspection sur le terrain de chaque terril étudié. Les terrils faisant partie de l’étude géotechnique sont repris dans la liste ci-dessous : - Argenteau Ancien et Argenteau Nouveau – OBID 578-579 – L6 et L7 - Saint-Placide – OBID 343 – B60 - 14-17 et Siège social – OBID 5151 – B80-1 - Héribus – OBID 557 – B88-1 - Crachet 7/12 – OBID 286 – B111 [less ▲]

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See detailIn situ and laboratory mechanical characterization of a loess sequence from Middle Belgium
Delvoie, Simon ULiege; Charlier, Robert ULiege; Collin, Frédéric ULiege

Conference (2016, May 25)

A 10 m thick loess (aeolian silt) layer located beside the Romont quarry (Eben-Emael, Middle Belgium) has been investigated in order to characterize the mechanical behaviour of the silty material. Cone ... [more ▼]

A 10 m thick loess (aeolian silt) layer located beside the Romont quarry (Eben-Emael, Middle Belgium) has been investigated in order to characterize the mechanical behaviour of the silty material. Cone penetration tests (CPT) have been performed with different cones (M1-type, M2-type and electric) in order to evaluate the influence of the cone on the mechanical behaviour interpretation. Concurrently, laboratory tests have been performed on undisturbed samples from core drillings. Laboratory tests consist of a physical characterization (grain size distribution, Atterberg limits) and a mechanical characterization (oedometer tests). This comprehensive investigation study focuses on the comparison of the loess characterization between in situ and laboratory approaches. CPT-based soil behaviour type charts are analyzed and compared with the Unified Soil Classification System. Many relations also exist in the literature between parameters obtained from CPT results and from laboratory tests. The study explores the existing relations between the cone resistance and the oedometer constrained modulus in order to verify the related coefficients proposed in the literature for silty material. [less ▲]

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See detailEvaluation de la stabilité d'une paroi rocheuse à Flémalle
Delvoie, Simon ULiege; Collin, Frédéric ULiege

Report (2016)

La caractérisation détaillée du massif rocheux a été réalisée à partir de mesures in situ et d'observations. Ces données sont ensuite utilisées dans l'analyse de stabilité du massif rocheux. Un traitement ... [more ▼]

La caractérisation détaillée du massif rocheux a été réalisée à partir de mesures in situ et d'observations. Ces données sont ensuite utilisées dans l'analyse de stabilité du massif rocheux. Un traitement adéquat de la paroi est finalement proposé afin de minimiser les projections de blocs rocheux sur d'éventuels bâtiments sur le moyen et le long terme. [less ▲]

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