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Investigating the Local Granulated Blast Furnace Slag

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Open Journal of Civil Engineering 2012年第1期2卷 10-15页

作者： mohamed nacer guetteche Abdesselam Zergua Samia Hannachi Department of Civil Engineering University Mentouri Constantine Algeria

The promotion of blast furnaces slag in construction industry aims at protecting the environment, fighting against the nuisance such as waste dumps and promoting local products. The use of granulated slag as a part replacement of Portland cement or in the production of clinker free binder constitutes a valuable outlet for this product. The aim of this study is the characterization of local granular slag using various techniques such as chemical analysis, X ray diffraction, differential thermal analysis, infrared spectrometry, and conductimetry. These methods provide a clearer understanding of the vitreous structure of this type of slag and also provide clues as to the nature of its hydraulic reactivity. Mechanical tests have been carried out using 4 × 4 × 16 cm3 prismatic mortars using a composition activated by the clinker, varying the fineness of slag, its content and the nature of clinkers. Results obtained show that this type of slag is reactive, the evolution of its mechanical resistance depends on its fineness, and that long-term mechanical performance is of great interest.

关键词： Activation Cement Clinker Mortar Promotion Slag

Recovery and Use of Blast Furnace Slag in the Field of Road Construction in Algeria

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Open Journal of Civil Engineering 2013年第2期3卷 113-118页

作者： Kamel Rouabah Abdesselam Zergua Ahmed Beroual mohamed nacer guetteche Department of Civil Engineering Constantine 1 University Constantine Algeria

Waste and industrial by-products represent a significant percentage of the industrial landfill. The evaluation of these products has a dual effect: it avoids both the landfill (risk of environmental pollution) and limits the use of natural aggregates (depletion of natural resources and landscape fragmentation and the imbalance of the ecosystem). In recent years, applications for industrial waste have been taken into account in the construction of roads with a great interest in many industrialized countries and developing countries. The use of these materials in the construction of the road is a decision based on technical, economic and ecological criteria. In Algeria, the steel plant of El-Hadjar (Annaba), due to its activity generates a significant industrial waste (slag) which creates a storage problem and pollution. For industrialized countries, this product is an abundant raw material at low cost that must be used on a large scale public works. Our study implies the use of slag in the preparation of the subgrade and surface course (as coated). The results of chemical, physical and mechanical analyses of El-Hadjar slag and materials developed, compared to those of natural aggregates, can be used as aggregate in road construction.

关键词： Bitumen Road Platform Mechanical Testing Blast Furnace Slag

Self Compacting Concrete under Local Conditions

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Open Journal of Civil Engineering 2013年第2期3卷 119-125页

作者： Abderahmane Seddik Ahmed Beroual Abdesselam Zergua mohamed nacer guetteche Department of Civil Engineering Constantine 1 University Constantine Algeria Department of Civil Engineering Ferhat Abbas University Setif Algeria

This paper presents the results of experimental investigations on mechanical properties of self compacting concrete made with local materials. The used materials were cement, aggregate and super plasticizer. Limestone powder, silica fume and blast furnace slag have been used as adjuvant in self compacting concrete (SCC). Self compacting concrete properties in fresh and hardened state are characterized and analyzed. The test results indicate the possibility to manufacture SCC with good rheological and mechanical properties using local materials.

关键词： Self Compacting Concrete (SCC) Mineral Additions Super Plasticizer Workability Compressive Strength and Tensile Strength

Lithospheric structure in NW of Africa:Case of the Moroccan Atlas Mountains

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Geodesy and Geodynamics 2015年第6期6卷 397-408页

作者： Youssef Timoulali nacer Jabour Youssef Hahou Mimoun Chourak Institut Scientifique Mohamed V University National Center of Research (CNRST) Faculty of Sciences Abdelmalek Essaadi University Faculty of Sciences Mohammed 1er University

This study presents the outcomes of the local earthquake tomography applied in the Moroccan Atlas domains. A seismic data collected by 36 seismic and a linearized inversion technics are used for determination of local velocity *** interpretation of tomography images results emphasizes a new and detailed lithosphere structure： a remaining subducted zone beneath the Souss Basin located from 20-to 45-km depth dipping to the North is detected and interpreted as a body that marks the border between the Moroccan Anti-Atlas and the Meseta-Atlas domains.A subduction zones is detected in the SW of the High Atlas, beneath the Hercynian Tichka massif from 10 to 50-km inclined away from Anti Atlas and in the eastern part of Anti Atlas, dipping northward from Jbel Ougnat at 15e40 *** junction of the western and middle High Atlas is depicted by two high velocity blocks subducting from 10 to 50 km depth. The first is dipping SW beneath the High Atlas and the second is dipping SE beneath the Ouarzazate *** the northern part of the southwestern High Atlas, a high velocity body dipping towards the north beneath the Essaouira Basin from 15 to 45 km *** northeastern part of the High Atlas in the Mougeur zone, a high velocity body is detected from 10 to 45 km depth, dipping to the Se E beneath the eastern High *** negative lithospheric anomalies found in the upper and in the lower crust are interpreted as a hot asthenospheric material upwelling from deep and gradually replacing the part of crust detached in the High Atlas. The occurrence magmatic activities in these regions testify the existence of a remaining subduction process. This paper argues the implication of these deep structures in the evolution of the Moroccan Atlas Mountain.

关键词： Atlas Mountains Seismic tomography Crustal velocity Lithospheric structure Remains subduction Delamination