NASSIMA Bakir

BELHOUT Mohamed. , BADJKA Imane.

Etude de l’effet de l’ajout des déchets d’aluminium sur l’amélioration des caractéristiques physiques et mécaniques d’un sol affaissable.

ZEGAAR Nabil , BENZIANE Benallia

Traitement des sédiments du barrage de K’sob en vue de d’améliorer leurs caractéristiques physiques et mécaniques

Saidane Ibtissam , souayb Abd elrazak.

Amélioration des caractéristiques mécaniques des sédiments du barrage de k’sob par un traitement à base de sable dans le but de leur utilisation dans des travaux routiers.

djardali sabrina , chergui nora.

Amélioration des caractéristiques mécanique des sédiments du barrage de k’sob par un traitement dans le but de leur utilisation dans des travaux routiers.

Zemouri nour el houda , Zine khaoula.

Caractérisation mécanique de la vase du barrage de k’sob en vue de sa valorisation dans des travaux routiers.

Megag Hanane

Traitement d'un sol affaissables par un ajout mixte de fibre de verre et de ciment

Yahi Kais

Traitement d'un sol affaissables par de fortes teneurs en déchets de verre

Ghazal Ratiba

Traitement d'un sol affaissables par de fortes teneurs en déchets d'aluminium.

Benyahia Nour el houda

Influence de la teneur en déchet de verre sur le degré de collapse d'un sol affaissable

Djagham Maroua

Influence de l'ajout de déchets de verre sur les caractéristiques physiques d'un sol affaissable

Ferahtia Issam

Amélioration des caractéristiques mécaniques des sols affaissables par l'ajout de déchets de verre

Mezaache Farouk

Amélioration des caractéristiques mécaniques des sols affaissables par l'ajout de déchets d'aluminium

Most developing countries have hot climate, ordinary jobsites characterized by reduced of human resources, equipment and infrastructures. The objective of this article is to make an experimental study of the influence of the hot climate such as that of Algeria, on the different properties of concrete in the fresh state, such as excessive water evaporation from the concrete surface, increased demand for water, increased slump loss corresponding to additional water on job-site, higher plastic shrinkage cracking and difficulty in controlling air content. At the hardened state, we could mention a reduction of strength at 28 days, decreased durability resulting from cracking at long-term period. To show the problems linked to concreting under these conditions and to present the appropriate solutions concrete or mortar can withstand the conditions in which it is implemented. Thus, negative effects caused principally by hot weather concreting motivated the choice of the such study. The research experimental work conditions in which the cementitious matrix was kept concerned two different environments, namely hot and dry climate conditions (t = 40°, h = 0%) alike the climate of the region of M'sila., and that of a medium with a hot and humid environment (t = 40°, h = 100%). The output of the investigation demonstrated the crucial role of the cure method in hot regions. The comparison of results for a reference concrete kept in air without any curing measures with two curing types simulating hot weather environment of the region M’sila was undertaken. These obtained outcome results were discussed based on the influence of climatic conditions to conclude procedures for hot weather concreting and suitable cure methods.

Citation

NASSIMA Bakir , , (2021), Experimental Study of the Effect of Curing Mode on Concreting in Hot Weather, Revue des Composites et des Matériaux Avancés, Vol:31, Issue:4, pages:pp. 243-248., Journal of Composite and Advanced Materials

Soil collapse remains a major issue affecting structural foundations, particularly in arid and semi-arid zones where humidification is a key factor contributing to the collapse. Much research has been devoted to identifying treatment methods which enhance the stability and load bearing capacity of this type of soil. This paper investigates the potential advantages of the addition of milled glass fibers (F�). Soil samples were prepared at different compaction energies and various water contents, then treated with different percentages of milled glass fiber, before being submitted to the simple consolidation odometer test. The results obtained in this study showed that soil samples treated with an optimal dosage of 6% of milled glass fibers compacted at 60 blows and humidified at 6% of moisture content. This represents an improvement in the stability of the soil, reducing the collapse potential (C�) from 11.95% to 1.62%. This treatment method produces soil which can be classified as a moderate risk foundation soil according to the Jennings and Knight evaluation metrics (1975). Keywords: collapsible soils, arid zones, fiberglass, odometer test

Citation

Larbi BELAGRAA , NASSIMA Bakir , ABBECHE Khelifa, Gérard Panczer, , (2020-03-13), Study of the Effect of Waste Glass Fibers Incorporation on the Collapsible Soil Stability Behavior, KnE Engineering, Vol:1, Issue:1, pages:10, KnE Engineering

Abstract The present study is to investigate the physical and mechanical properties of the prepared sand mortars, mainly based on the local Oued Souf sand region south of Algeria, this in accordance with standard sand grading. The principal aim of the research is to replace the restricted fine part between (0.08and 0.16 mm) which is of the order 15% and to substitute it with additions active slag (S) and inert glass powder(GP) with dosages of 5, 10 and 15 % and maintain the rest of the granular fractions of the sand studied fixed. Thus, to see and analyze the influence of these additions on the physical properties and in regards the mechanical performances of confected prepared sand mortars. The results showed the advantageous effect of replacing the said prepared sand with two additions (slag and glass powder) on physical, mechanical properties mortars based on this local sand by improving the performance of these cement products, especially at an optimal percentage of 10%.

Citation

Larbi BELAGRAA , NASSIMA Bakir , Khemissi Bellalmi, Bachir Taallah, Lila Briki, , (2020-01-01), Characterization of a sustainable mortar based on mineral additions and prepared sand, International Conference on Materials & Energy (ICOME’19), Vol:330, Issue:2020, pages:5, Revue des Composites et des Matériaux Avancés

. Collapsible soil presents a porous unsaturated structure, its sudden settlement after humidification, without supplementary charge, can be of a big nuisance for the foundations and therefore for the constructions built on it. To improve its structure and limit its instability, samples of laboratory reconstituted soil, with different percentages of water contents and compacted at different compaction energies, were treated with glass-fiber. The study of the mechanical behavior was performed by oedometer tests. The microstructure was explored by the Scanning Electron Microscope (SEM). The results obtained show clearly the efficiency of the treatment with glass fiber on reducing the collapsibility of such soil.

Citation

NASSIMA Bakir , ,(2019), Experimental study of the effect of the glass fibers on reducing collapse of a collapsible soil.,The 2019 world congress on advences in structural engineering and mechanics ASEM19,Korée

The collapsible soils whose humidification is the main factor of collapse, is the major problem of the foundation soil of the various structures, which are located mainly in the arid and semi-arid zones. Much research has been devoted to the treatment of this type of soil in order to enhance its stability and its bearing capacity. The present paper deals with the influence of the addition of milled glass fibers (Fg) on improving soil stability regarding the collapse. Soil samples were prepared at different compaction energies and various water contents then treated at different percentages of milled glass fiber, to be submitted to the simple consolidation odometer test. The results obtained in this study showed that a treated soil with an optimal dosage of 6% of milled glass fibers, compacted at 60 blows and humidified at 6% of moisture content, gave an improvement of the stability of the soil and a reduction of the collapse potential (Cp) from 11.95% to 1.62%. This let us to conclude that our treated soil is considered as a moderate risk foundation soil according to Jennings and Knight (1975) classification.

Citation

NASSIMA Bakir , Khelifa Abbeche, Gérard Panczer, Larbi Belagraa, ,(2019), Study of the effect of waste glass fibers incorporation on the collapsible soil stability behavior,Remine International Conference RICON 19,University of Beira interior, Portugal

L’étude de l’identification ou du traitement des sols affaissables n’a connu un réel développement qu’aux alentours des années 1980. Ces sols sont du genre non saturée, métastable, qui une fois humidifié sous une certaine charge peuvent subir un effondrement provoquant la ruine de toute construction émergeant de ce type de sol. Les sols effondrables sont localisés dans les régions arides ou semi-arides, présentant donc une faible teneur en eau, et caractérisé par une granulométrie qui présente un faible pourcentage d’éléments fins reliant les gros grains favorisant ainsi l’existence d’une structure lâche à grande porosité. Pour pallier aux problèmes causés par ce type de sol, nous avons proposé une étude expérimentale basée sur l’essai de la double consolidation, et qui présente le traitement du sol à la chaux comme solution afin de diminuer d’une façon considérable le taux d’affaissement, puis nous avons essayé de vérifier, la concordance (si elle existe) des résultats donnés par les deux méthodes d’estimation de l’effondrement celle de la simple et de la double consolidation.

Citation

NASSIMA Bakir , Abbeche Khelifa, abdelazize.meddah@univ-msila.dz, ,(2018-11-28), Etude expérimentale du traitement d'un sol affaissable par la chaux en utilisant la méthode de la double consolidation,Séminaire international de Génie Civil (SIGC 2018),Oran, Algérie

Collapsible soil presents a porous unsaturated structure, its sudden settlement after humidification, without supplementary charge, can be of a big nuisance for the foundations and therefore for the constructions built on it. To improve its structure and limit its instability, samples of laboratory reconstituted soil, with different percentages of water contents and compacted at different compaction energies, were treated with glass-fiber. The study of the mechanical behavior was performed by oedometer tests. The microstructure was explored by the Scanning Electron Microscope (SEM). The results obtained show clearly the efficiency of the treatment with glass fiber on reducing the collapsibility of such soil.

Citation

NASSIMA Bakir , Khelifa Abbeche, Gérard Panczer, , (2017), Experimental study of the effect of the glass fibers on reducing collapse of a collapsible soil., Geomechanics and Engineering, Vol:12, Issue:1, pages:71-3, Techno-Press P.O. Box 33, Yuseong, Daejeon 34186, Korea

Selon l’Eurocode 4, un assemblage mixte est un assemblage d’un élément structural mixte (acier-béton) et de tout autre élément structural, dans lequel les armatures du béton sont destinées à contribuer à sa résistance. Les assemblages mixtes en bâtiment sont, généralement, des assemblages poutre-poutre et des assemblages de type poutre-poteau. Notre contribution consiste à proposer une méthode simplifiée pour le calcul de la rigidité initiale ( Sj,ini ), le moment résistant ultime en flexion ( Mj,Rd ) et la capacité de rotation (fCd ) de ce type d’assemblage mixte. Cette méthode a l’avantage d’être utilisable manuellement par les ingénieurs praticiens. En conclusion générale, nous constatons que la prise en compte de la contribution des armatures longitudinales de la dalle dans la zone d’assemblage et la connexion acier-béton dans la poutre mixte avaient une grande influence sur le comportement flexionnel de l’assemblage mixte (poutre mixte-poteau métallique).--------------------(25 et 26 Novembre 2015) (pp. 5-10).

Citation

Messaoud TITOUM , Azzeddine LAHMADI , NASSIMA Bakir , Aida MAZOZ, ,(2015-10-01), Proposition d’une méthode simplifiée pour le calcul des caractéristiques d’un assemblage mixte (poutre-poteau),Journées d’étude de Génie Civil (JEGC2015),M’sila, ALGERIE

Collapsible soils are defined as unsaturated structures, which can undergo radical rearrangement of its particles and a sharp decrease in volume after wetting with or without load. Most of these soils are loess or eolian deposits constituted of silt and sand which are located in arid or semi-arid area. Southern Algeria is constituted largely of loess formations and is nowadays an area with a high potential for agricultural development. The occupation of this region is at risk of collapse of structures erected on land "Collapsibles". Therefore, we propose treatment solutions which are economic and easy to implement. This paper presents an experimental study of the treatment of collapsible soil which is reconstituted in the laboratory by different contents in lime using the method of double consolidation. Samples of this soil with different moisture contents are compacted with different energy levels. The expected purpose of this study is to reduce the potential of subsidence of these soils to an acceptable level.--------------------(May 20-23, 2015) (page 334).

Citation

NASSIMA Bakir , Azzeddine LAHMADI , Khelifa ABBECHE, ,(2015), Reduction of the settlement of a collapsible soil by the addition of lime, use of the double consolidation method,International Conference on Civil and Environmental Engineering (ICOCEE – CAPPADOCIA 2015),Nevşehir, TURKEY

Cette recherche expérimentale présente un cas de traitement au laboratoire, par différents types de sels, d’une argile expansive prélevée de la zone de Sidi Hadjres, à l’Ouest de M’sila (Algérie). Une série d’essais œdométriques, par la procédure de gonflement libre, est effectuée sur des éprouvettes inondées par différentes solutions en utilisant plusieurs concentrations. Une deuxième série d’essais est réalisée afin d’avoir l’influence du traitement sur l’état de consistance des argiles. Les résultats obtenus montrent une importante efficacité de certains types de sels sur le gonflement libre et l’état de consistance.--------------------(25 et 26 Novembre 2015) (pp. 11-14).

Citation

Azzeddine LAHMADI , Messaoud TITOUM , NASSIMA Bakir , ,(2015), Etude expérimentale de l’influence des sels sur le gonflement et la consistance d’une argile expansive de la région de Sidi Hadjres (Wilaya de M’sila),Journées d’étude de Génie Civil (JEGC2015),M’sila, ALGERIE