Génie civil

Permanent URI for this collectionhttps://dspacee.univ-temouchent.edu.dz/handle/123456789/763

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Innovation dans la formulation d’un béton léger
(2025) HOCINE, Sara; HADDOUBENDERBAL, Fatima; KADA BENOUNANE, Mohamed ilies; MAROUF, Hafida
Amid the growing challenges faced by the construction sector in enhancing thermal performance, reducing weight, and promoting environmental sustainability, lightweight concrete emerges as a promising alternative to traditional concrete. This study aims to investigate the physical and mechanical properties of lightweight concrete manufactured using lightweight expanded clay aggregates (LECA) and natural pozzolan, two local materials incorporated into the mix to optimize the overall performance of the concrete. Thanks to its porous structure and low density, expanded clay contributes to reducing the concrete’s bulk density while improving its thermal insulation properties. Natural pozzolan enhances the durability and strength of the concrete through chemical reactions that reduce permeability and improve resistance to environmental aggressions. Several lightweight concrete formulations were prepared and subjected to experimental tests including compressive and flexural strength, thermal conductivity coefficient, ultrasonic pulse velocity, and capillary absorption. The results indicated that some formulations provide satisfactory mechanical properties and improved thermal performance compared to conventional concrete, along with a significant reduction in bulk density. This study highlights the importance of integrating local and sustainable materials in concrete production, thereby opening new avenues for the use of lightweight concrete in both structural and non-structural applications within the construction sector.
Pertinence des Modèles Réduits des Structures pour l’Analyse Dynamique en Utilisant les Tables Vibrantes
(2025) GHEZAL, Lamia Kaoutar; MAZINGI, Valerie; DERBAL, Rachid; BENMANSOUR, N
This thesis focuses on the study of the dynamic behavior of structures subjected to seismic loads, through the use of scaled models experimentally tested on a shaking table. The main objective is to evaluate the relevance of these reduced models in accurately reproducing the dynamic response of a real structure, taking into account similarity laws and scale effects. The approach combines theoretical modeling, the physical design of a reduced model (representing a bridge pier), and a series of dynamic tests aimed at identifying vibrational characteristics such as natural frequencies, periods, and damping ratios. Two main damping identification methods are implemented: logarithmic decrement and half-power bandwidth. An experimental seismic simulation, based on the 1995 Kobe earthquake, is then conducted to analyze the model’s response to a real excitation. The results show good agreement between experimental, analytical, and numerical approaches, confirming the reliability of reduced models for seismic analysis. This work highlights the importance of physical laboratory tests to validate theoretical assumptions, improve numerical simulation tools, and enhance the resilience of structures against earthquakes.
APPLICATION DES RESEAUX DE NEURONES POUR LA PREDICTION DES SOLS GONFLANTS
(2025) EL HADJ ALI, AICHA DJIHANE; RAIS MOHAMED, ALI; BELABBACI, ZEYNEB; CHERIFI, WAFA NOR EL HOUDA
Swelling soils, particularly those rich in smectite-type clays, represent a critical geotechnical issue in many regions around the world. Their ability to undergo significant volume changes due to variations in water content poses a serious threat to the stability of infrastructures, including building cracks, pavement heaving, and disruptions to underground networks. Traditionally, the determination of key parameters—namely, swelling pressure and swelling potential relies on experimental tests (oedometer, free swell, double oedometer, etc.) that are time consuming, costly, and technically demanding. Moreover, these methods require specialized equipment and strict testing conditions to ensure reliable results. This study proposes an innovative approach to predicting soil swelling parameters using artificial neural networks (ANN). Based on a rich and diverse experimental database (438 samples for pressure, 291 for potential), two predictive models were developed. The results demonstrate that the use of artificial neural networks offers a reliable, fast, and cost- effective alternative to laboratory testing for forecasting the swelling behavior of soils. The developed models successfully captured the nonlinear and multi-parameter nature of the swelling phenomenon with satisfactory accuracy, particularly for swelling pressure. This approach thus opens new perspectives for broader integration of artificial intelligence in geotechnical studies.
Analyse dynamique d’une structure élancée en réponse à des sollicitation sismique
(2025) MISSOURI, Abdelkader; BAILICHE, Souad; AMARA, Khaled
Concevoir d'un polymère pour la cicatrisation et le scellement des fissures dans des dalles en béton.
(2025) Bouabdallah, Mohamed Nadjib; Cherifi, Youcef Hassen; Youcef, Hassen; Kameche, Zine Abidine
This thesis addresses the critical issue of concrete cracking, a fundamental material in civil engineering, whose low tensile strength compromises structural durability and promotes rebar corrosion. The study proposes an innovative repair approach using in- situ radical polymerization, aiming to restore the integrity and watertightness of cracked concrete.The first part of the work details cracking mechanisms and detection methods, including advanced techniques like ultrasound and the Water Permeability Test (WPT) based on Darcy's Law. The experimental methodology involved preparing Ordinary Concrete (BO) and Self-Compacting Concrete (BAP) samples of different ages, inducing controlled micro-cracks using the Brazilian test, and characterizing their opening. Permeability results quantitatively demonstrated the significant impact of cracks: they considerably increase water passage compared to sound matrices. Crack size is a dominant factor, with wider cracks leading to higher water flow. Interestingly, cracked BAP showed higher permeability than cracked BO for a finer crack, suggesting different crack morphologies. Concrete age also influences matrix permeability. This work highlights the urgency of controlling and repairing cracking, and the obtained data will serve as a reference for evaluating the future effectiveness of polymeric self- healing techniques. The goal is to validate the treatment's ability to significantly reduce water passage and restore an acceptable level of watertightness, opening new perspectives for the preventive maintenance of infrastructures.
Comportement dynamique des bâtiments de différentes hauteurs en présence des réservoirs
(2025) - BENSAFI, Said Mohamed; LOUS, Meriem Niema; TAHAR BERRABAH, Amina
This work focuses on the study of the separate and combined effects of building height and the presence of a terraced reservoir on its spectral modal dynamic behavior using both versions of the RPA code and choosing the SAP 2000 finite element code for simulation. A four-story structure located in Ain Temouchent was used as a case study. The Housner method is considered useful and simple for reservoir fluid simulation. In order to study the impact of building height, other floors were added to the initial structure (four-story), namely six-story and eight-story. The results were compared and conclusions were drawn.
LE PATRIMOINE ARCHEOLOGIQUE COMME LEVIER DE DEVELOPPEMENT TERRITORIAL. CAS DES SITE SIGA D’AINTEMOUCHENT.
(2025) BARRAH, IKRAM; ADJEROUDI, ROMAISSA; ELHADJ MIMOUNE, AREZKI
Heritage, With all its définitions, all its types, all its perceptions is a Very important and Very exclusive vector in the développement of the country because It gives us a national and international Identity, It gives us Through the maintenance and enhancement of a heritage of world-famous and very frequented territories, and This Through a Sustainable and profitable approach. On This spear we chose to Works on neglected and little-known archaeological sites and to intervene by taking care of thème, promoting thème and making thème éco-monetized, and This is how we identified the Siga archaeological site which perfectly suited our thème. Despite the prestigious Past of our archaeological site Siga located in the wilaya of Ain TEMOUCHENT, its assets and opportunities, its totally Natural landscape as well as its strategic site, It finds itself marginalized and isolated compared to seaside Tourist destinations. On This orientation the approach was carried out on good bases in order to respond to the problem outlined, by intervention and contribution to the development of the archaeological site Through an opération of reconversion of an old farm located in the heart of the site as a solution.
L'application de la terre crue comme mortier dans les revêtements muraux
(2025) LAHOUEL, Oumaima; MOSTEFAI, Mohamed; CHALABI, youcef
This thesis explores the use of earth as a construction material, focusing on raw earth mortars, which are often underestimated in contemporary practices. Through a comprehensive bibliographic study, we identified various methods for utilizing earth and specifically chose to work with wall-rendering mortar. We employed two main materials: a moderately plastic loamy clay and a very clean fine sand. Three mortar formulations were developed: M-1 (50% Clay + 50% Sand), M-2 (33.33% Clay + 66.67% Sand), and M-3 (25% Clay + 75% Sand). The water content was determined visually, inspired by traditional practices, and a relationship between nthis content and the liquid limits was established. Fresh-state tests revealed that the M-2 mix offered the best performance in terms of linear expansion and mass loss. In the hardened state, M-1 demonstrated superior thermal conductivity, while M-2 and M-3 exhibited resistance to tension and compression, respectively. However, we also observed the vulnerability of earth mortars to water, highlighting the need for stabilization to enhance their durability. In conclusion, this work recommends the use of the M-2 mix for its optimal characteristics, while suggesting future research avenues to strengthen the moisture resistance of earth mortars. This thesis thus contributes to the valorization of earth materials in the field of sustainable construction.
Modélisation et analyse paramétrique d’une poutre en béton armée réparée par des matériaux composites
(2025) SAKRANE, Nabila; BEN MAACHOU, Fatima Zohra; LAZIZI, Amina
This work focuses on evaluating the effectiveness of composite materials, particularly fiber-reinforced polymers (FRP), in repairing reinforced concrete beams damaged by cracking. In response to the growing need for durable rehabilitation solutions, composite materials appear as a promising alternative due to their excellent mechanical properties, light weight, and high resistance to corrosion. The main objective of this study is to model the structural behavior of a cracked concrete beam strengthened with FRP sheets, in order to assess the improvement in performance after repair. An analytical approach based on theoretical models from the literature was adopted, combined with numerical simulations using ABAQUS software to monitor the evolution of stresses and deformations. The results demonstrated that FRP reinforcement significantly enhances load-bearing capacity, reduces crack openings, and improves structural stiffness. This study thus confirms that composite materials represent a reliable and sustainable solution for extending the service life of deteriorated reinforced concrete structures.
Caractérisation d’un matériau d’isolation bio sourcé
(2025) SELLAF, WAIL; MERABET, MOHAMED EL BACHIR; DERBAL, Ahlam
Thermal insulation plays a key role in reducing energy consumption in buildings by minimizing heat transfer through their envelope. It involves the use of construction materials with low thermal conductivity, primarily aimed at reducing energy losses while ensuring thermal comfort for occupants. The main objective of this study is to conduct an experimental analysis of construction samples made with various insulating materials, in orderto compare their performance and identify the most effective thermal insulation solutions.
Renforcement des chaussées par des matériaux composites : Cas d’études projet PN30 Mascara
(2025) Benchick, Ahmed Iyad; Kenoui, Mohamed; MOUAICI, Fethi
The Algerian Road network, vital for socio-economic development, is experiencing accelerated degradation due to heavy traffic, harsh climatic conditions, and aging of material. These deteriorations compromise pavement durability of the roadways, increasing maintenance costs and reducing their efficiency. To remedy this, composite materials are emerging as an innovative solution, offering superior strength, lightness, and durability. This report analyzes their application in pavement reinforcement by examining their properties, modeling techniques (via ANSYS), and a practical case study (PN30 Mascara project). Geogrids, in particular, optimize stress distribution and reduce cracking. The study highlights the importance of a multidisciplinary approach (geotechnics, material mechanics) and validates the effectiveness of synthetic reinforcements through numerical simulation. Finally, it showcases technological advancements and research prospects for more resilient infrastructure.
Application of Artificial Neural Networks to Predict the Workability of Self-compacting concrete
(2025) SAIM HADDACHE, Ahmed Iheb Larbi; BEKRADDA, Abderrahmane Said; DOUNANE, Nawal
In a context of constant innovation in construction techniques, self-compacting concrete (SCC) has emerged as an innovative material, requiring an optimized formulation to ensure its fresh-state properties. This study proposes the use of artificial neural networks (ANN) to predict SCC formulations containing limestone filler. Based on a large database drawn from more than 60 studies, ANN models connect formulation parameters (water/cement ratio, aggregates, superplasticizer, limestone filler) to three key performance indicators (slump-flow diameter, V-funnel time, and L-box ratio). The developed ANN models have demonstrated their accuracy (via R2 and MSE) in predicting experimental results with good agreement. This approach significantly reduces the number of laboratory tests required, thereby saving time and money while reducing CO2 emissions. Thus, the proposed method combines artificial intelligence and data analysis to offer an innovative and sustainable solution for SCC formulation.
Elaboration d’un mortier écologique a base de liège
(2025) Benzina, bochra chahrazed; benzina, kheira nesrine; ABDELHADI, houari
Faced with environmental challenges such as greenhouse gas emissions and the depletion of natural resources, the construction industry is increasingly moving toward sustainable practices. This includes the use of local and sustainable materials. The objective of this thesis is to reduce the environmental impact of construction materials by incorporating agricultural waste, such as cork, into the composition of gypsum-based mortars. Gypsum is frequently used in the construction industry due to its global availability and vaunted properties. However, it has limitations regarding its mechanical characteristics and acoustic insulation, requiring the implementation of improvement strategies. The aim of this research is to analyze the use of cork industry residues as a partial sand substitute in gypsum mixes. Various quantities of cork (0, 25, 50, 75, 100%) were tested to analyze their influence on the material's physical, mechanical, and acoustic characteristics. The results indicate that the addition of cork results in a decrease in mechanical strength; however, satisfactory performance is observed up to a 50% substitution rate. Furthermore, it should be noted that permeability and water absorption capacity increase proportionally to the amount of cork used, requiring increased vigilance in humid environments. The use of a mortar composed of plaster and natural cork offers significant benefits in the field of eco-construction, particularly by improving thermal insulation and reducing the weight of structures. However, it is imperative to ensure precise control of the amount of cork added to maintain the material's mechanical performance. This study represents a significant contribution to the incorporation of bio-based materials in the field of civil engineering, paving the way for more environmentally sustainable construction practices.
REALISTIC VISUALIZATION OF CONSTRUCTION MATERIALS IN BLENDER FOR CIVIL ENGINEERING
(2025) HASSAINE, HAYET; CHAFI, FERREH; KADDOUR, Hakim
In recent years, advanced visualization technologies have profoundly transformed design processes in civil engineering. Among these, Blender—a free and open-source 3D software—has emerged as a powerful and accessible tool for realistic simulation of construction materials. However, we identified a major challenge in this field: the lack of accurate and realistic material representation in 3D models, which can lead to structural analysis errors and negatively impact design decisions. To address this issue, we developed a method (workflow) for realistic visualization of materials in Blender, including steel, brick, concrete block, granite, zinc, and floor slabs. Our approach involves 3D modeling, texture application based on Physically Based Rendering (PBR) principles, and the creation of a Python add-on to streamline material management. As part of this work, we also compiled a digital library of textures tailored to the studied materials. Additionally, we conducted a simulation of a collapsing brick wall to demonstrate Blender’s potential for visualizing structural phenomena. Our findings reveal that: • Photogrammetry-based PBR yields more realistic and representative results than procedural PBR, albeit at higher computational costs. • Blender is not limited to artistic applications; it serves as a comprehensive, accessible, and educational platform for realistic material simulation in civil engineering.
Conception d’un béton à base de granulats recyclés
(2025) REBHI Mohammed Ali; ACHACHERA Mohammed; BOUKHOBZA Aymen Salah Eddine; ZENASNI Yasmine; MOKADEM Randa; Dr MAROUF Hafida
This thesis explores the design of innovative concretes incorporating recycled aggregates, a response to the scarcity of natural resources in Algeria and the imperative to valorize construction waste. The project aims to develop a sustainable and economically advantageous alternative for the building and public works (BTP) sector, promoting recycling for the benefit of the environment. Recycled aggregates, although less expensive (15% to 30% cheaper than traditional concrete), present technical challenges that can impact durability. Their characterization revealed average abrasion resistance (31.6% fines generated in the Los Angeles test) and more pronounced degradation in the presence of water. Above all, their high water absorption and high water content significantly impact the dosage and workability of concrete, which is crucial for its final durability. The formulation of concrete must therefore precisely adjust the mixing water and incorporate admixtures to compensate for these properties and ensure good durability. Beyond material design, the thesis examines the application of these concretes in structures, such as analyzing the behavior of flexible pavements under load, with or without geogrid reinforcement, using numerical simulations. This work contributes to a better understanding of the integration of recycled aggregates and the optimization of recycling for the environment, highlighting the need for clear standards and continuous research for widespread and sustainable adoption in construction.
Formulation d’un béton à base des fibres hybrides
(2025) Kerzazi, Mohamed; Guennaoui, Mohamed Abdellah; DERBAL, Ahlem
This work focuses on the study of hybrid fiber-reinforced concrete, a major innovation in construction materials. Through theoretical, experimental, the impact of combining metallic and synthetic fibers on the mechanical properties, durability, and microstructure of concrete was evaluated. The results demonstrate that fiber hybridization significantly enhances tensile strength, ductility, crack control, and material durability. This research opens new perspectives for optimizing concrete formulations for demanding structural applications. Comprehensive literature review on different fiber types (metallic,polypropylene, natural), their mechanical properties, and reinforcementmechanisms was adding, characterization of materials used (cement, aggregates,fibers) and determination of optimal fiber dosages, preparation of hybrid fiber concrete mixes with various fiber combinations and dosages. xperimental testing including mechanical tests (compression, tensile, flexural), durability assessments, and microstructural analysis. Analysis and interpretation of results to understand fiber-matrix interactions and optimize concrete formulations.
Effet de la Température sur les Mortiers à Base de fibres Végétales.
(2025) Lalla, ISmail; Zahraoui, Mohamed Ihab; DERBAL, Ahlem
Mortar is a cement-based material widely used in civil engineering. In certain use conditions, especially when exposed to high temperatures (such as fires or extreme environments), its physical and mechanical properties may be significantly affected. Therefore the present experimental study aims to analyze the effect of temperature on the behavior of mortars reinforced with natural plant fibers, particularly those extracted from date palm and marine algae. Special attention was also given to the incorporation of natural perlite from Hammam Boughrara (Maghnia), used as a partial replacement for sand, to improve the thermo-physical behavior of the mortar and lighten its structure. This research focuses on the influence of these natural components in various mortar formulations, using a constant water/binder ratio and exposing them to increasing temperatures of 200, 400, and 600°C. The plant fibers were pre-treated with an alkaline solution (NaOH) to enhance their durability and bonding with the cement matrix. Several tests were conducted on both fresh(workability, entrained air) and hardened mortars (flexural and compressive strength, capillary absorption, thermal conductivity, ultrasound). The results show that the addition of plant fibers and perlite significantly influences the thermo-mechanical behavior of the studied mortars. At room temperature, their performance is improved, but at higher temperatures, the thermal degradation of the fibers becomes a limiting factor. This study highlights the potential of plant fibers and perlite as eco-friendly and efficient alternatives in mortar formulation, while emphasizing the importance of optimal dosage and appropriate treatments to ensure thermal stability.
Formulation d’un Béton Fibré
(2025) Zemmour, Abdel Djawed; Hammadi, Ahmed Amine; Marouf, Hafida
The construction industry is one of the largest consumers of natural resources and CO2 emitters, threatening the global ecological balance. Traditional concrete, a cornerstone of the sector, heavily relies on non-renewable materials, exacerbating environmental degradation. In the face of this urgent challenge, it is imperative to integrate bio-based materials that reduce environmental impact while ensuring optimal mechanical and thermal performance. The incorporation of natural fibers such as flax offers a promising solution, enhancing compressive and flexural strength as well as thermal insulation without compromising cost or material durability.
Influence de l'Argile Bentonite sur le temps de prise et le retrait de la pâte cimentaire modifiée avec un adjuvant superplastifiant.
(2024) Banza wa sakula, Erick; Abada, Mohammed; Kameche, Zine El-Abidine
Mineral additions are increasingly used by concrete and mortar producers. Their consideration in the formulation of cementitious materials for compliance with the minimum cement dosage (substitution of a quantity of cement by mineral addition) is of particular interest on the economic (reduction in the cost of raw materials) and ecological (reduction CO2 emissions and consumption of non-renewable resources). This study aims to valorize a Bentonite clay from the Maghnia region in the form of calcined powder (heat treated) in a mortar in the fresh and hardened state, where the major interest of which is given to the mechanical and physical properties of the material. So, the influence of different Bentonite dosages (5, 10, 15 and 20%) was studied experimentally in an adjuvanted mortar with a E/L ratio equal to 0.28. The main objectives of this work are to study the influence of Bentonite on the evolution of capillary absorption and occluded air, as well as on the evolution of the setting time and the shrinkage of the material in its hardened state. In this study, mathematical relationships are developed between certain physical and mechanical properties determined in the fresh and hardened states.
Analyse plastique d’une structure endommagée
(2024) Gacem, manel; Daoud gherib, chems; Moussi
The aim of this work is first to make a dynamic calculation of the R + 3 facility using the SAP 2000 code while going through the stages of pre-sizing and load calculation, then to study the effect of column damage on linear and non-linear dynamic behavior of the structure. Damage in this work is defined as loss of column function. Three columns are thought to have been damaged, namely the edge column, the corner column and the middle column. The method of payment is chosen as the method of calculating plastic, the results found are compared and the results drawn.

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