GADOURI Hamid
@univ-dbkm.dz
Teacher at Earth Sciences Department, Faculty of Nature and Life Sciences and Earth Sciences
University Djilali Bounaama Khemis-Miliana
Dr. GADOURI Hamid was born in 1986 in Tacheta Zougagha, Ain Defla, Algeria. He received his both Lice & Ms degrees in Geotechnical Engineering from Djillali Bounaama University in 2008 and 2010, respectively. Then, he received a Ph.D. degree in Construction Engineering and Geotechnical Risks branch from Yahia Farès University of Medea in 2017 under both supervisors of Pr. HARICHANE Khelifa and Pr. GHRICI Mohamed. At present, he is a researcher member in the Geomaterials Laboratory, Civil Engineering Department, Faculty of Civil Engineering and Architecture, Hassiba Benbouali University, Chlef, Algeria. His research interests are Geotechnical Engineering and ground improvement methods. He is the author and co-author of more than ten scientific papers and he is the reviewer of the American Journal of Civil Engineering (AJCE). He has gained considerable experience during the courses taught at Yahia Farès University.
EDUCATION
Doctorat in Geotechnical Engineering (2017) from Yahia Farès University, Medea, Algeria
Master in Geotechnical Engineering (2010) from Djillali Bounaama University, Khemis Miliana, Algeria
Licence in Geotechnical Engineering (2008) from Djillali Bounaama University, Khemis Miliana, Algeria
RESEARCH, TEACHING, or OTHER INTERESTS
Geotechnical Engineering and Engineering Geology, Civil and Structural Engineering, Geology, Environmental Science
Scopus Publications
Scopus Publications
Brahim Meziani and Hamid Gadouri
IOS Press
This paper focuses on assessing natural hazards in northern Algeria, particularly landslides, earthquakes, and floods, which result in substantial material and human losses. The specific objective of this study is to investigate landslides in the Djebahia region, specifically related to the water transfer pipeline from the Acerdoune dam to M’sila town. The research collects and analyzes geophysical and geotechnical data to identify the key factors influencing landslides in this area.The study reveals that the main factors contributing to induced landslides in Djebahia are the steepness of the terrain, water availability, and soil composition, particularly marl and clay. These factors can lead to varying depths of the sliding surface, ranging from 7 to 20 meters. To mitigate the risk of movement in this region, the paper suggests the installation of two series of piles. Additionally, inclinometers have been placed near these piles to monitor depth-related movements. Over a two-year period, the inclinometric results indicate acceptable displacements at various depths.
Brahim Meziani and Hamid Gadouri
Springer Science and Business Media LLC
Brahim Meziani, Hamid Gadouri, Abdelkader Bouderbala, and Mohammed Hemza Aissa
Springer Nature Switzerland
Hamid Gadouri and
Jordan University of Science and Technology
The use of lime in sulfate-bearing clayey soils has historically caused structural damage to infrastructures due to the formation of an expansive ettringite mineral. In this paper, a research was conducted to study the effectiveness of natural pozzolana (NP) for providing better stabilization of sulfate-bearing soils. Compaction and free-swell potential tests were first performed on lime-stabilized grey and red clayey soils (GS and RS) containing different contents of added sodium and calcium sulfates (2, 4 and 6% Na2SO4 or CaSO4·2H2O). Then, the same tests were repeated by adding 20%NP. The test results indicated that the presence of 4% and 6% Na2SO4 in the soil resulted in an abnormal increase in the swell potential of both lime-stabilized GS and RS. The X-ray diffraction (XRD) results confirmed the growth of the ettringite mineral responsible for this higher swell potential. However, the use of 8% lime with 20%NP in stabilizing sulfate-bearing clayey soils produced significant improvements in the optimum moisture content (OMC) and maximum dry density (MDD), as well as in the swell potential. The addition of 20%NP into the lime-stabilized GS and RS eliminated the harmful effect of Na2SO4. In addition, for 120-day curing period, the use of 6% CaSO4·2H2O was found very effective by reducing the swell potential of NP-lime-stabilized GS and RS from 7.33% to 0.4% and from 2.79% to 0.2%, respectively trips. KEYWORDS: Clayey soils, Mineral additives, Sulfates, Compaction, Swell potential, Stabilization.
Abdelmoumen Aala-Eddin Driss, Khelifa Harichane, Mohamed Ghrici, and Hamid Gadouri
Informa UK Limited
ABSTRACT There are several factors that affect the efficiency of soil stabilisation and their strength gain. In fact, the proportion of mixing is one of these factors which include mixing conditions, degree and timing of mixing, the quantity of hardening agent and moulding water content. An experimental study was undertaken in order to assess the effect of moulding water content (MWC) on some geotechnical properties of lime-stabilised an expansive soil. Lime was mixed with the studied soil within the range of 0% to 8%. All samples were performed according to three different conditions at different curing periods. The obtained results showed that the increase in lime content reduces the maximum dry density (MDD) and increases the optimum moisture content (OMC) where the increase in lime content causes a decrease in the specific gravity (Gs) with an increase in the void ratio. The unconfined compressive strength (UCS) of lime-treated high plastic clay increases with increasing lime content for the different conditions. Also, samples prepared at OMC and MDD develop very high UCS values compared to those prepared with a dry and wet side of optimum.
M Filali, A Nechnech, J de Rosa, H Gadouri, and B Meziani
Academy of Science of South Africa
The purposeof this study isto present the results of geotechnical investigations and landslide analysis in a marl deposit at the Sahel (coast) of Algiers in northern Algeria, where many landslides take place in the Plaisancian marls, particularly following rainfall periods each year, causing severe damage to infrastructures and buildings. The physico-mechanical characteristics of the soils obtained from three different sites (El-Achour, Daly-Brahim and Ouled-Fayet) were analysed to identify the mechanism of these landslides. In the study, the laboratory test results providing grain-size distribution, Atterberg limits, water content, shear strength, and compressibility were analysed. The findings showed that, although the soils were characterised by slightly higher plasticity at Ouled-Fayet, they were generally homogeneous in the studied sites. The upper soils, generally weathered, exhibited low shear strength parameters, which are lower than the undisturbed formation beneath. The stability analysis based on limit equilibrium methods (LEM) showed the significant influence of pore water pressures on slope stability, suggesting that the weathered soils are prone to instability processes due to the effect of long rainy periods.
Billal Sari Ahmed, Hamid Gadouri, Mohamed Ghrici, and Khelifa Harichane
Informa UK Limited
ABSTRACT The effect of fly ash (FA) on geotechnical properties of high plasticity clayey soils (known as problematic soils) has been investigated by several researchers. However, few studies have been developed to predict the geotechnical properties of FA–stabilised problematic soils. This study was undertaken in order to develop best-fit models for predicting the Atterberg limits (liquid limit; LL and plasticity index; PI), unconfined compressive strength (UCS), free swell index (FS), optimum moisture content (OMC) and maximum dry density (MDD) of FA-stabilised high plasticity clayey soils. For this purpose, many data sources were collected from several laboratory studies published in the literature over the past. All the developed models were validated and found to have a good ability where they can be used as a reliable tool to predict all the LL, PI, UCS, FS, MDD and OMC of FA-stabilised high plasticity clayey soils. In addition, the suggested models showed that the accurate prediction of all the studied physico-mechanical properties was highly beneficial for the engineering construction enabling it to avoid the cumbersome tests in the laboratory. From these results, the obtained equations may be useful in practices of civil engineering projects and in designing earth structures such as roadway subgrades, road embankments, trench backfills, landfill liners and earth dams.
Hamid Gadouri, Khelifa Harichane, and Mohamed Ghrici
Informa UK Limited
Abstract An experimental investigation was undertaken in order to assess the effect of sodium (Na2SO4) and calcium (CaSO4·2H2O) sulphates and curing period on stress–strain curves and failure modes of grey (GS) and red (RS) clayey soils stabilised by lime (L), natural pozzolana (NP) and their combinations (L–NP). Several soil–L–NP mixtures were studied to be used as subgrade soils for road pavements. Stress–strain curves were obtained from unconfined compressive strength (UCS) test made on several soil–L–NP specimens after curing for 7 and 120 days. Tests results showed that the use of L or L–NP without sulphates produced a significant increase in peaks stress of both clayey soils and then modified their stress–strain curves from nonlinear to linear behaviour almost up to 70% of peak stress after a longer curing period. However, the presence of 2% Na2SO4 or any CaSO4·2H2O content provided beneficial effects on peaks stress and stress–strain curves of both stabilised clayey soils and then improved their linearity almost up to 95% of peak stress after curing for 120 days. In contrast, the presence of 6% Na2SO4 caused undesirable effects. In addition, both sulphates greatly affected the failure modes of soil–L–NP specimens, particularly at a later stage.
Khelifa Harichane, Mohamed Ghrici, and Hamid Gadouri
Springer Science and Business Media LLC
Hamid Gadouri, Khelifa Harichane, and Mohamed Ghrici
Informa UK Limited
ABSTRACT The geotechnical properties of subgrade soils may need to be enhanced for appropriateness in pavement construction using mineral additives such as cement, lime (L) and fly ash. An experimental investigation was undertaken to study the effects of sodium (Na2SO4) and calcium (CaSO4·2H2O) sulphates on pH and pozzolanic reactions of soil–lime–natural pozzolana (soil–L–NP) mixtures in order to choose an adequate mixture for pavement subgrade soil stabilisation. The pH was measured for different curing periods with and without sulphates. The results showed that increases and decreases in pH values depend on the type of additive and its amount, type of sulphate and its content, mineralogical composition of stabilised soil and curing period. In addition, the pH parameter can be used as an indicator to track the pozzolanic reactions process. On the other hand, clayey subgrade soils can be stabilised with Lime–Natural Pozzolana (L–NP) mixtures containing any amounts of CaSO4·2H2O which is highly recommended. However, Na2SO4 with a low content has a better effect on the behaviour of these soils but become deleterious when its content is greater than 2%. In general, the addition of sulphates accelerates both the pozzolanic reactions and NP dissolution.
Ismehen Taleb Bahmed, Khelifa Harichane, Mohamed Ghrici, Bakhta Boukhatem, Redouane Rebouh, and Hamid Gadouri
Informa UK Limited
Abstract Clayey soils are known as problematic soils for geotechnical engineering since several years. The effect of mineral additives on geotechnical properties of clayey soils has been many times investigated. However, there are a few investigations about the use of artificial neural networks (ANNs) for predicting the geotechnical properties of stabilised soils, all the same, the ANNs can be successfully used in this field. The accurate prediction of plasticity index (PI), maximum dry density (MDD) and optimum moisture content (OMC) is beneficial for the construction engineering in order to avoid the cumbersome tests in the laboratory. The aim of this research is to develop three models with good performances based on ANNs, and to predict all the PI, OMC and MDD values of subgrade soil stabilised with the addition of lime, using basic soil parameters which are always available for engineers. Three different models are developed which each one corresponding to the best architecture for the three properties where these models can be used as a reliable tool to predict the PI, OMC and MDD of clayey soils stabilised with lime.
Hamid Gadouri, Khelifa Harichane, and Mohamed Ghrici
Informa UK Limited
Abstract This paper presents a comparison study between calcium (CaSO4·2H2O) and sodium (Na2SO4) sulphates effects on physico-mechanical properties (pH, plasticity index (PI), unconfined compressive strength (UCS) and shear strength parameters) of both grey and red clayey soils (GS and RS) stabilised with lime (L), natural pozzolana (NP) and their combination (L–NP) in order to recommend adequate mixtures which can be used as building materials for road pavements. In this study, Atterberg limits, pH, UCS and shear strength tests were carried out after different curing periods (1–120 days). Tests results showed that the addition of L as an additive produced a high decrease in the PI of both clayey soils but a considerable increase in UCS, cohesion (C), internal friction angle (φ) and pH was recorded, whereas the NP caused a slight effect. However, when combining both additives, a high decrease in the PI and a further increase in other properties were recorded. Moreover, it was found that the CaSO4·2H2O lowered the PI of both clayey soils whereas the Na2SO4 increased it. Thus, the increase in pH values of all mixtures with sulphate content was more pronounced with the Na2SO4 than with the CaSO4·2H2O. On the other hand, both CaSO4·2H2O and Na2SO4 accelerated the pozzolanic reactions responsible for strength gain. However, at a later stage, the degradation of RS specimens can be explained by the formation of ettringite observed in X-ray diffraction (XRD) patterns. In general, the CaSO4·2H2O developed better effects for soil improvement whereas the presence of Na2SO4 (with a high content) can be classified as a deleterious element for soil stabilisation. From these results, tow tables were given for choosing an adequate mixture for pavement subgrade soil stabilisation.
Hamid Gadouri, Khelifa Harichane, and Mohamed Ghrici
Informa UK Limited
According to the Unified Soil Classification System (USCS), fine-grained soils, such as clays and silts, can be classified by plotting the values of their plasticity index and liquid limit on a plasticity chart. However, soil classification can be affected by mineral additives and sulphates. The effect of both sodium (Na2SO4) and calcium (CaSO4·2H2O) sulphates on the soil classification of soil–natural pozzolana, soil–lime and soil–lime–natural pozzolana mixtures has been studied. The results showed that in the absence of sulphates, the addition of lime and lime‒natural pozzolana to both clayey soils improved considerably their soil classification. However, a negligible change in soil classification was recorded when natural pozzolana was used alone. The presence of sulphates influenced significantly the soil classification of these mixtures, especially with the curing period. The modification in the soil classification was more pronounced with the Na2SO4 than with the CaSO4·2H2O. Furthermore, the sensitivity of the soil classification to the sulphate effect was also more pronounced with the Na2SO4 than with the CaSO4·2H2O. The utilisation of CaSO4·2H2O as on additive is highly recommended for obtaining the best class soil. In general, the transformation in the class soil of both stabilised grey and red soils depends largely on the type of additive and its amount, the type of sulphate and its amount, the mineralogical composition of the stabilised soil and the curing period.
Zamila Harichane, Mohamed Elhebib Guellil, and Hamid Gadouri
IGI Global
The present article highlights the beneficial effect of considering soil and structure parameters uncertainties on the soil-structure response. The impedance functions of a circular foundation resting on a random soil layer over a homogeneous half-space were obtained by using cone models. The obtained results showed that the randomness of the layer's thickness and the shear wave velocity significantly affected the mean spring coefficients whereby coefficients of variation (COV) of 10% and 20% in these parameters reduced the mean spring coefficients about 32% and 40%, respectively, for the horizontal motion and about 12.5% and 25%, respectively, for the rocking motion. The sensitivity of the mean structural response to the randomness effect was obtained to be more pronounced to structural parameters than to soil parameters. In addition, 20% COV in both soil and structure parameters reduced the mean structural response about 39%, translated by an increase in the damping of the coupled system which may be considered as a beneficial effect from code provisions point of view.
Hamid Gadouri, Khelifa Harichane, and Mohamed Ghrici
Informa UK Limited
An experimental investigation was undertaken to study the effects of sodium sulphate (Na2SO4) on the behaviour of two clayey soils stabilised with lime (L), natural pozzolana (NP) and their combination (L–NP). The geotechnical properties investigated are the Atterberg limits and unconfined compressive strength (UCS) on samples cured for 1–120 days curing period. The results show that the L and L–NP reduce the plasticity index (PI) and increase the UCS of two clayey soils. However, the PI of these soils increases when the Na2SO4 is present. In addition, higher UCS values are recorded with 2% Na2SO4. But at later stage, the samples containing 4 and 6% Na2SO4 were completely deteriorated due to the formation of ettringite mineral. In general, the effect of Na2SO4 on the soil stabilisation process depends on the type of additive and its content, the soil nature, the Na2SO4 content and the curing period.
Hamid Gadouri, Khelifa Harichane, and Mohamed Ghrici
Springer Science and Business Media LLC
Hamid Gadouri, Khelifa Harichane, and Mohamed Ghrici
Periodica Polytechnica Budapest University of Technology and Economics
An experimental investigation was undertaken to study the effect of calcium sulphate (CaSO 4 .2H 2 O) on the behaviour of the grey clay (GS) and red clay (RS) soils stabilized with lime (L), natural pozzolana (NP) and their combination (L-NP). In this study, the geotechnical properties investigated are respectively, the Atterberg limits on samples cured for 1 to 30 days to assess the diffusion time effect of CaSO 4 .2H 2 O (DTC) in the soil paste and the unconfined compressive strength (UCS) on samples cured for 7 to 120 days. The results show that both GS and RS samples can be successfully stabilized with L alone or with L-NP which substantially reduce their plasticity index (PI) and increase their UCS. On the other hand, a negligible effect was reported when the NP is used alone. However, when combining a fraction of CaSO 4 .2H 2 O to samples containing L or L-NP, a further decrease in the PI is observed. In addition, higher UCS values are recorded.