Bensaid Boulekbache

Hassiba Benbouali University of Chlef | UHBC · Faculty of Civil Engineering and Architecture

The aim of the present study is to consider the possibility of using dune sand concrete (DSC) as a replacement for ordinary concrete in lightly loaded constructions such as those used for housing and dwelling. Mineral additives such as limestone fillers are found to influence some of the physical and mechanical properties of the sand concrete and h...

This study aims to propose a new approach to predict the long-term thermal compressive and tensile uniaxial basic creep behavior of high-performance concrete sample at different temperature levels (20 °C, 50 °C, 80 °C), by using nonlinear finite element analysis. The new approach is based on the coupling between Burger's rheological model, two-phas...

This study presents the results of tests on the compressive and tensile strengths, and the rapid penetration of chlorides of concrete containing foundry sand waste. Foundry sand (FS) was used as a partial replacement for fine aggregates and replacement levels varied from 0 to 20% in 5% increment. It has been observed that foundry sand replacement t...

Ce travail est consacré à l’étude de la durabilité du béton à base de granulats recyclés. L'étude expérimentale a porté sur différents taux de substitution (0%, 25%, 50%, 75% et 100%) du gravier naturel par du gravier recyclé. En effet, lors de la confection des bétons, une période de pré-saturation des granulats a été ajoutée au protocole de malax...

This paper presents an experimental and numerical study of the effect of steel fibres on the deflection behaviour and the contribution to the stiffness of tensioned concrete made by steel fibres reinforced concrete (SFRC) beams without stirrups, tested under four-point bending. The main testing parameters were the compressive strength of the concre...

This paper presents an experimental investigation and nonlinear finite element analysis (NLFEA), using the numerical analysis tool ANSYS©, carried out on the shear and diagonal cracking effect on the behaviour of reinforced-concrete (RC) beams made of normal strength concrete (NSC) and high-strength concrete (HSC), with and without transverse reinf...

This paper presents the experimental results of a wide research program, tending to determine the hydration mechanism, mechanical properties and the durability performance of ternary cement containing limestone powder and slag. The limestone powder increase the hydration at early ages inducing a high strength at, but it can reduce the later strengt...

The main objective of this study is the assessment of the ability of limestone mortars to resist to different chemical attacks. The ability of polypropylene (PP) fibres waste used as reinforcement of these concrete materials to enhance their durability is also studied. Crushed sand 0/2 mm which is a fine limestone residue obtained by the crushing o...

This article presents an experimental study aiming to provide reliable experimental data for the prediction of the shear strength of reinforced concrete beams without stirrups. The shear strength results obtained from the proposed model as well as those from the design codes (ACI 318, Eurocode 2 and BS 8110) are compared with the database containin...

This study deals with an experimental and numerical investigation focused on the total shrinkage of concrete made with recycled coarse aggregates (RCA) and subjected to various isothermal temperatures. The objective of the experimental work is to assess the influence of the external temperatures (20, 35 and 50 °C) and the percentage of RCA replacem...

The flexural behaviour of steel fibres reinforced concrete (SFRC) beams is investigated using digital image correlation (DIC) technique. The deflection and curvature of the tested RC beams have been analysed by DIC technique. The experimental results in terms of deflection and other results found in the literature are compared against the predicted...

In this study, the interfacial stresses in RC beams strengthened by externally bonded prestressed GFRP laminate are evaluated using an analytical approach, based on the equilibrium equations and boundary conditions. A comparison of the interfacial stresses obtained from the present analytical model and other existing models is undertaken. Otherwise...

In this study, a nonlinear numerical analysis is carried out to predict the creep response of reinforced concrete (RC) beams externally strengthened using carbon fiber-reinforced polymer (CFRP) and glass fiber-reinforced polymer (GFRP) laminates. The beams are tested under static four-point bending; the level of sustained service load is equal to 5...

This paper presents the experimental results of a wide research program, tending to determine the hydration mechanism, mechanical properties and durability performance in ternary cement containing limestone powder and blast furnace slag. The limestone powder increase the hydration at early ages inducing a high strength at early age, but it can redu...

L'étude présente un travail expérimental sur le retrait total du béton à hautes résistances (BHR) contenant des fibres métalliques(FM) ayant deux élancements (55 et 80), des fibres polypropylènes (FP) et des fibres hybrides (FH) exposé à des températures de cures isothermes 20°C, 35°C et 50°C. Deux dosages de fibres ont été utilisés, 0.5% et 1% pou...

This study highlights the influence of the combination of limestone powder (LP) and Ground granulated blast furnace slag (GGBFS) on the mechanical properties and durability performance of ternary blended cement. Mortars samples have been subjected to flexural and compressive tests and to 1% HCl, 3% H2SO4, 5% Na2SO4 and 5% MgSO4 attacks. The obtaine...

Fibre distribution is an important factor, affecting both the fresh- and hardened-state properties of concrete. The paper describes a study in which the fibre distribution and orientation were investigated by means of a suitable technique, by using a translucent fluid model with a yield stress (Carbopol 940). The observation confirmed the ability o...

In this study, a numerical investigation is conducted to simulate the total shrinkage strain of High-Strength Concrete (HSC) and Steel Fiber Reinforced High-Strength concrete (SFRHSC) by means of the transient thermal-stress analysis. The ANSYS finite element software has been used in order to evaluate the shrinkage by taking into account both the...

The present study is focused on experimental investigations and numerical analyses of compressive and tensile total creep at long-term of high-strength concrete (HSC) beams. Reinforced concrete (RC) beams with and without steel fibres were investigated for their long-term creep behaviour. These beams are under sustained uniformly distributed load (...

This work constitutes a contribution to the analysis of the behavior of beams repaired by composite materials. To analyze the overall behavior and failure modes of the beams, an experimental study of nine reinforced concrete beams, pre-cracked and then repaired by composite materials was conducted. Six beams were pre-cracked and repaired in the ten...

This work was devoted to the material-scale study of the mechanical behavior of confined concrete by composite materials based on carbon fiber and glass under compression and bending loading. In this context, an experimental work on cylindrical and prismatic concrete specimens has been carried out. The obtained results permitted the identification...

This work constitutes a contribution to the analysis of the behavior of beams repaired by composite materials. To analyze the overall behavior and failure modes of the beams, an experimental study of nine reinforced concrete beams, pre-cracked and then repaired by composite materials was conducted. Six beams were pre-cracked and repaired in the ten...

This work was devoted to the material-scale study of the mechanical behavior of confined concrete by composite materials based on carbon fiber and glass under compression and bending loading. In this context, an experimental work on cylindrical and prismatic concrete specimens has been carried out. The obtained results permitted the identification...

L’évolution du risque de fissuration du Béton à Haute Résistance cause une problématique majeure lors de la réalisation des ouvrages importants de génie civil. La fissuration précoce des ouvrages en béton résulte en grande partie des variations dimensionnelles du matériau liées à son évolution thermique, hydrique, chimique et microstructurale au je...

ABSTRACT: In this paper the mechanical performances of concrete reinforced with synthetic waste fibres have been investigated. The tests were carried out to examine the effect of the length and the dosage of synthetic waste fibres on the workability, the flexural strength and the compressive strength of concrete. Several concretes were fabricated w...

The use of recycled synthetic fibres in cementitious materials can be considered as resources conservation and an adequate solution to some environmental problems. In this investigation, numerous tests have been carried out to study the performances of cementitious mortars reinforced by recycled synthetic fibres under hot-dry climate. These tests c...

This paper presents the results of cyclic loading tests on fibre-reinforced concrete (FRC). The main objective of this research is to evaluate simultaneously the influence of the workability, the steel fibres and the compressive strength on the flexural behaviour of FRC under cyclic loading. Prismatic concrete specimens having dimensions of 150 × 1...

In this paper, an experimental investigation is carried out to study the influence of the curing temperature, types of fibres, their dosages and their aspect ratios on the total shrinkage and mechanical properties of the high-strength concrete (HSC) containing steel fibres (SF) considering two aspect ratios (55, 80), polypropylene fibres (PF) and h...

The paper presents the results of an experimental work on the flexural behavior of three types of concrete: normal strength concrete (NSC), high strength concrete (HSC) and high strength fiber concrete (HSFC) in terms of crack detection, crack development, crack width measurements and strain components, using the Digital Image Correlation (DIC) tec...

The study aims at analysing the fracture mechanism of steel fibre-reinforced concrete in tensile splitting using digital image correlation. The work also aims to exam the influence of both the steel fibre addition and the compressive strength on the behaviour of fibre-reinforced concrete (FRC) in splitting tension test. Cylindrical concrete specime...

This paper presents an experimental study on the flexural strength of reinforced concrete beams made with high performance concrete (HPC) and ordinary concrete (OC). We are carried an experimental campaign aimed comes in three points: 1- the study of the law of behavior of the two materials (OC and HPC), 2- the influence of the compressive strength...

Ce papier présente les résultats d’une étude expérimentale sur le comportement en flexion des bétons de fibres métalliques. On étudie l’effet de la rhéologie du béton sur l’orientation des fibres et l’influence de l’orientation sur les propriétés mécaniques. La rigidité de l’ancrage des fibres étudiée par les essais cycliques est liée aux caractéri...

This paper presents the results of an experimental investigation to study the physical and mechanical performances of mortars reinforced by polypropylene fibres and stored for 91 days in three different environments (hot-dry, laboratory and cold environment). The mortars samples were cured in water for 14 days, before they were affected in the chos...

This work reports on an experimental investigation dealing with the effects of transverse reinforcement, in the form of stirrups, on the behaviour under load of high performances concrete (HPC) beams. The crack patterns and crack widths, the failure modes, the shear strengths and the ductility of HPC beams containing transverse stirrups were assess...

This paper presents the results of an experimental investigation dealing with the effects of transverse reinforcement on the crack patterns, the ultimate carrying capacity and the ductility of beams made of high strength concrete and normal strength concrete for comparison purposes. The test results are analyzed and compared with the shear provisio...

This study aims in examining the influence of the paste yield stress and compressive strength on the behaviour of fibre-reinforced concrete (FRC) versus direct shear. The parameters studied are the steel fibre contents, the aspect ratio of fibres and the concrete strength. Prismatic specimens of dimensions 10 × 10 × 35 cm made of concrete of variou...

The paper describes a study in which sixteen reinforced concrete beams without transverse stirrups were tested to failure to investigate the influences of the shear-span/depth ratio ( a/d), the longitudinal steel ratio (ρ) and the compressive strength of concrete ( f' c ) on the global behaviour in shear for beams made of normal strength concrete (...

T. 2. Performance of materials RESUME Ce papier présente les résultats d'une étude expérimentale sur l'influence de la rhéologie sur l'orientation des fibres métalliques et par suite sur le comportement en flexion et compression des bétons de fibres. Plus précisément, on étudie l'influence de l'orientation d'un volume de 0.5 % de fibres sur les pro...