SAIDA Boualleg

KADRI HICHAM

ETUDE DE LA DURABILITE DES CIMENTS DE MORTIER A BASE DE LA FUMEE DE SILICE FACE AUX MILIEUX SULFATIQUES

SACI SOFIANE AYMEN , CHEMINI WALID

ETAT DE CONNAISSSANCE SUR LA DURABILITE DES BETONS

BENSALAH BRAHIM , Aribi Billal

ETUDE COMPARATIVE ENTRE UN BETON AUTOPLAÇANT ET UN BETON ORDINAIRE SUR LES PROPRIETES CARACTERISTIQUES A L’ETAT FRAIS ET DURCIS

GOUFI DJAMEL , BOUABDELLAH RIDA

Effet du type de ciment sur la profondeur de carbonatation du mortier conservé dans un milieu agressif

AICHAOUI BOUHLEM , DAFFAF MOURAD

Effet du rapport E/C sur la profondeur de la carbonatation du mortier conservé dans un milieu agressif

This article aims to propose a solution to two environmental problems. One is the silting up of dams, despite the dredging operations. The other represents the rate of cement used in the mortar or concrete. The solution is to introduce the calcined dredged sludge as a cement substitute. Treatment at 600 °C with different heating rates (5, 10 and 20 °C/mn) was applied to make the mortar and measure setting time and hydration temperature. This substitution increased the values of both tests due to the dilution and filler effect. Choosing the last speed, different percentages have been selected (5, 10 and 20%) to produce ordinary concrete and the follow up of the compressive strength and water absorption tests. The results of the two tests are lower than the control. In concrete, the pozzolanic reaction is very weak to develop a compact structure due to a lack of reactive silica. The results obtained for 5% and 10% of substitution are very encouraging.

Citation

Saida BOUALLEG , ,(2023-11-10), Dam sludge effects - as a cement substitution- on cementitious materials,4th International Conference on Applied Engineering and Natural Sciences on 10-13 November in 2022 at Konya/Turkey.,Konya/Turkey.

The aim of this work is to quantify cement hydration as a function of the mechanical and chemical characteristics of mortar cement. To control the quantity of hydrated cement, we adopted the thermogravimetric thermogravimetric (TGA) method, which enabled us to determine the degree of hydration α(t),This technique is coupled with carbonation and ordinary mortar strength. The experimental data obtained were correlated and interpreted the evolution of strength and carbonation as a function of the degree of hydration, unavoidable. Cements containing different percentages of slag.The evolution of kinetics was studied for 3, 7 and 28 days. According to the results obtained, the hydration rate is inversely proportional to the addition content in the cement. The degree of hydration is directly related to the formation of hydrates and portlandite. The greater the quantity, the greater the hydration.The Bhatty Bhatty method is verified for calculating the degree of hydration and can be successfully applied to composite cements.

Citation

Saida BOUALLEG , MOHAMED AZIZ Chikouche , ,(2023-10-18), study of the correlation chemical-mechanical test and the hydration rate of cement mortar based on slag materials,first national conference on advanced materials and their application(NCAMA 23 ),tipaza/algeria

The aim of this work is to quantify cement hydration as a function of the mechanical and chemical characteristics of mortar cement. To control the quantity of hydrated cement, we adopted the thermogravimetric thermogravimetric (TGA) method, which enabled us to determine the degree of hydration α(t),This technique is coupled with carbonation and ordinary mortar strength. The experimental data obtained were correlated and interpreted the evolution of strength and carbonation as a function of the degree of hydration, unavoidable. Cements containing different percentages of slag.The evolution of kinetics was studied for 3, 7 and 28 days. According to the results obtained, the hydration rate is inversely proportional to the addition content in the cement. The degree of hydration is directly related to the formation of hydrates and portlandite. The greater the quantity, the greater the hydration.The Bhatty Bhatty method is verified for calculating the degree of hydration and can be successfully applied to composite cements.

Citation

Saida BOUALLEG , MOHAMED AZIZ Chikouche , ,(2023-10-18), study of the correlation chemical-mechanical test and the hydration rate of cement mortar based on slag materials,first national conference on advanced materials and their application(NCAMA 23 ),tipaza/algeria

The aim of this work is to quantify cement hydration as a function of the mechanical and chemical characteristics of mortar cement. To control the quantity of hydrated cement, we adopted the thermogravimetric thermogravimetric (TGA) method, which enabled us to determine the degree of hydration α(t),This technique is coupled with carbonation and ordinary mortar strength. The experimental data obtained were correlated and interpreted the evolution of strength and carbonation as a function of the degree of hydration, unavoidable. Cements containing different percentages of slag.The evolution of kinetics was studied for 3, 7 and 28 days. According to the results obtained, the hydration rate is inversely proportional to the addition content in the cement. The degree of hydration is directly related to the formation of hydrates and portlandite. The greater the quantity, the greater the hydration.The Bhatty Bhatty method is verified for calculating the degree of hydration and can be successfully applied to composite cements.

Citation

Saida BOUALLEG , MOHAMED AZIZ Chikouche , ,(2023-10-18), study of the correlation chemical-mechanical test and the hydration rate of cement mortar based on slag materials,first national conference on advanced materials and their application(NCAMA 23 ),tipaza/algeria

This article aims to propose a solution to two environmental problems. One is the silting up of dams, despite the dredging operations. The other represents the rate of cement used in the mortar or concrete. The solution is to introduce the calcined dredged sludge as a cement substitute. Treatment at 600 °C with different heating rates (5, 10 and 20 °C/mn) was applied to make the mortar and measure setting time and hydration temperature. This substitution increased the values of both tests due to the dilution and filler effect. Choosing the last speed, different percentages have been selected (5, 10 and 20%) to produce ordinary concrete and the follow up of the compressive strength and water absorption tests. The results of the two tests are lower than the control. In concrete, the pozzolanic reaction is very weak to develop a compact structure due to a lack of reactive silica. The results obtained for 5% and 10% of substitution are very encouraging.

Citation

Saida BOUALLEG , MOHAMED AZIZ Chikouche , ,(2022-06-28), THE BAHAVIOR OF CEMENT WITH DAM SLUDGE AS RAW MATERIEAL,FIRST NATIONAL CONFERENCE ON MATERIALS SCIENCES AND ENGINEERING (MSE 22),KHENCHELA

This work aims to propose a solution to two environmental problems. One is the siltation of dams. The other represents the rate of cement used in mortar and concrete. The solution is to introduce calcined dredging sludge as a substitute for cement. A heat treatment at 600°C was applied to the sludge. Different treatment rates were applied for the preparation of mortars (5, 10 and 20°C/min) to measure the rate of non-evaporable water and the porosity accessible to water. In the first test, the interval is very tight (3.20-3.40%), in the second test, the best porosity is attributed to 600/20 mortar with 18.50% of the total volume, against 19% in CEMI mortar. This substitution improves the compactness of mortars by tightening the capillary pores. For concrete, the last processing rate was adopted and different percentages were selected (5, 10 and 20%). The sound propagation in the UPV test is greater than 4 Km/s with a slight advantage to CEMI concrete followed by concrete with 5%, 10% then 20% of substitution. In concrete, the pozzolanic reaction is very weak to develop a compact structure due to a lack of reactive silica and a low percentage of kaolin (13%). The results obtained for 5% and 10% substitution are very encouraging for the use of these types of cement in second-order works.

Citation

Saida BOUALLEG , ,(2022-05-21), Performance of Eco-Binder Made with Dredged Sludg,The Second Edition of MAASI Scientific Week (SW22), from 21 to 31 May 2022, Istanbul- Turkey (Hybrid Mode),Istanbul- Turkey

The objective of this work is the quantification of hydration in cement. To monitor this quantity of hydrated cement "hydration degrees" we adopted the method of thermogravimetric analysis (TGA) which allowed us to determine the degree of hydration α(t), bound water (WB) and non-evaporable water. This study is completed by the analysis of diffractometers (DRX). Cements containing different percentages of slag. The evolution of the kinetics was studied during 3, 7 and 28 days. According to the results obtained, the hydration rate is inversely proportional to the addition content in the cement. The degree of hydration is directly related to the formation of hydrates and portlandite, more non-evaporable water retained in the hydrates corresponds to a high degree of hydration. This technique is coupled with the carbonation and strength of ordinary mortar. The experimental data obtained have been correlated and interpreted with regard to the evolution of strength and carbonation as a function of the degree of hydration, bound water and non-evaporable water of the cement hydrates. The Bhatty method is verified for the calculation of the degree of hydration and can be successfully applied for composite cements.

Citation

Saida BOUALLEG , , (2021), The Study of Slag Cement’s Microstructural Properties, Annales de Chimie - Science des Matériaux, Vol:45, Issue:2, pages:121-133, Lavoisier

The deterioration of concrete structures results from the corrosion of the steel reinforcement due to the carbonation of concrete and other aggressive agents (chloride ions, acid rain , etc…). The corroded reinforcement steel bars increases in volume, the concrete covering it is affected and hence the construction damage. The design of concrete is highly related to the concrete environment exposure during a project life. The cement is the main source of environmental impacts of the use of such concrete material. In order, to optimize the latter from an environmental point of view, it is necessary to reduce its cement dosage. This can be done by the cement replacement with mineral additions during its manufacturing. The present thesis work aims to study and better understand the physic-chemical phenomena involved in the hydrated mixture products (clinker + addition) during the natural carbonation process, to characterize cement with a high rate of substitution additions, quantify the effect of initial wet curing maturation on the different physico- chemical and mechanical properties of studied cementitious matrices .The investigation of study here in sheds light on the adequacy of the treatment cure modes on the performances of the mortars and concrete at hardened state. The parameters so far considered are the type of cement, the nature of the mineral addition and the curing regime mode. The results obtained show the considerable influence of the cure on the physical, mechanical and microstructural characteristics of the cementitious matrices. Further, a perfect correlation between the different parameters studied is noted. Keywords: Carbonation, Environment, Clinker, Mechanical resistance, Mineral additive.

Citation

SaidaBOUALLEG , ,(2017); INFLUENCE OF WET CURE ON THE CHARACTERISTICS OF MORTAR AND CONCRETE UNDER THE EFFECT OF AN AGGRESSIVE ENVIRONMENT (CARBONATION),université de Msila,

The aim of this work is to better understand the physical and chemical phenomena involved in hydrated mix (clinker + addition) during the natural carbonation process, to characterize cementwith supplementary cementitiousmaterials (SCMs) under various curing environment.The prepared cement pastes were characterized by thermogravimetric analysis. The results showed a considerable influence of the environment on the properties of mortars and cement and a perfect correlation between compressive strength, natural carbonation, nonevaporable water, and portlandite content. It was observed that the reduction of the curing period makes the mortars more sensitive.The kinetics of process was evaluated from Ca(OH)2 content and nonevaporable water contained inmortars.These two parameters reflect the hydration progress of the water/cement ratio studied. The weight loss due to Ca(OH)2 decomposition, calculated by DTA/TG analysis, shows the effect of the pozzolanic reaction and the natural carbonation. The supplementary cementitious materials (SCMs) play a considerable role in the slowing down of the aggression environment.

Citation

Saida BOUALLEG , , (2017), The Combined Effect of the Initial Cure and the Type of Cement on the Natural Carbonation, the Portlandite Content, and nonevaporable Water in Blended Cement, Advances in Materials Science and Engineering, Vol:2017, Issue:, pages:17, HINDAWI

Te aim of this work is to better understand the physical and chemical phenomena involved in hydrated mix (clinker + addition) during the natural carbonation process, to characterize cement with supplementary cementitious materials (SCMs) under various curing environment. Te prepared cement pastes were characterized by thermogravimetric analysis. Te results showed a considerable influence of the environment on the properties of mortars and cement and a perfect correlation between compressive strength, natural carbonation, nonevaporable water, and portlandite content. It was observed that the reduction of the curing period makes the mortars more sensitive. Te kinetics of process was evaluated from Ca(OH)2 content and nonevaporable water contained in mortars. Tese two parameters reflect the hydration progress of the water/cement ratio studied. Te weight loss due to Ca(OH)2 decomposition, calculated by DTA/TG analysis, shows the effect of the pozzolanic reaction and the natural carbonation. Te supplementary cementitious materials (SCMs) play a considerable role in the slowing down of the aggression environment.

Citation

Larbi BELAGRAA , Saida BOUALLEG , , (2017), The Combined Effect of the Initial Cure and the Type of Cement on the Natural Carbonation, the Portlandite Content, and Nonevaporable Water in Blended Cement, Advances in Materials Science and Engineering, Vol:2017, Issue:2017, pages:17, Hindawi

The aim of this work is to better understand the physical and chemical phenomena involved in hydrated mix (clinker + addition) during the natural carbonation process, to characterize cement with supplementary cementitious materials (SCMs) under various curing environment. The prepared cement pastes were characterized by thermogravimetric analysis. The results showed a considerable influence of the environment on the properties of mortars and cement and a perfect correlation between compressive strength, natural carbonation, nonevaporable water, and portlandite content. It was observed that the reduction of the curing period makes the mortars more sensitive. The kinetics of process was evaluated from Ca(OH)2 content and nonevaporable water contained in mortars. These two parameters reflect the hydration progress of the water/cement ratio studied. The weight loss due to Ca(OH)2 decomposition, calculated by DTA/TG analysis, shows the effect of the pozzolanic reaction and the natural carbonation. The supplementary cementitious materials (SCMs) play a considerable role in the slowing down of the aggression environment.

Citation

Mohammed BENCHEIKH , Saida BOUALLEG , Larbi BELAGRAA , MOHAMED AZIZ Chikouche , Daoudi Aziz, , (2017), The Combined Effect of the Initial Cure and the Type of Cement on the Natural Carbonation, the Portlandite Content, and Nonevaporable Water in Blended Cement, Advances in Materials Science and Engineering, Vol:2017, Issue:1, pages:17 pages, Hindawi

The effect of moist curing on the durability of concrete is very important in CPA concrete with cements containing slag, fly ash and silica fume, the nature and texture hydrates are changed. Improving sustainability is real what conditions as wet cure is sufficiently long to actually allow a change of hydrates. The term curing period is the period during which the cementitious material is allowed to stand in order to develop its performance in the hardened state.Regarding the choice of materials and sensitivity cement meant for media environments, the treatment plan is the key factor ensuring durability. The choice of cement is a secondary factor. In this sense the present work focuses on the effect of wet curing on the mechanical characteristics of the porosity accessible to water and depth of natural carbonation, mortars exposed to air for a continuous treatment is chosen as the middle witness. This study considers four types of mortar prepared with different high-grade cement added (clinker effect) such as CPA, CRS, CL30%, 30% CZ30%. Don’t have to find that the CPA and CRS after lasting cure for 7 days in the wet room (T = 20 °, RH = 95%) gives the best characteristics due to their high mechanical strength. Low portlandite, Cements CPJ always have the worst properties. Less important features more explained by the low speed and the Degree of hydration is affected by inadequate curing. Keywords: cure, pozzolan, slag, strength, carbonation.

Citation

Saida BOUALLEG , , (2014), Influence of the cure wet on mechanical physical and chemical mortar, The American Ceramic society, Transactions, Vol:249, Issue:, pages:225-233, John Wiley & Sons

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Citation

MohammedBENCHEIKH , SaidaBOUALLEG , Clastres Pierre, ,(2014); Influence of the Cure Wet on Mechanical and Physical Chemical Mortar. Processing and Properties of Advanced Ceramics and Composites VI: Ceramic Transactions,,,The American Ceramic Society

Ce travail a pour but d’étudier le comportement et la durabilité des bétons altérés par des eaux agressives, d’identifier les causes, de comprendre les mécanismes et d’évaluer l’influence de la cure et le type de ciment pour ce phénomène. La résistance aux agressions dépend de plusieurs facteurs qu’il n’est pas toujours aisé d’isoler : composition des différents constituants du béton (ciment, granulats), technique de mise en oeuvre, âge du béton, conditions climatiques et la nature des agents agressifs qu’il soient minéraux, organiques ou biologiques. La plupart des mécanismes d’altération sont gouvernés par processus lents. Depuis plusieurs années, des procédures d’essais accélérés ont été développées par les laboratoires; certaines sont normalisées (perméabilité aux ions chlore, caractérisation de la réactivité des granulats….), d’autres ont été déjà mises en oeuvre dans les applications industrielles (détermination du coefficient de migration, diffusion des chlorures, carbonatation accélérée, décalcification accélérée). La compréhension de ce mécanisme nécessite une revue bibliographique et une procédure expérimentale qui révèle la dégradation du béton soumis à des altérations. La procédure expérimentale consiste à étudier le comportement des éprouvettes en pâte de ciment, en mortier exposés à des différents traitements chimiques, à savoir, les nitrates d’ammonium, les sulfates de magnésium, les sulfates de sodium, le chlorure de sodium et l’acide sulfurique pendant une durée de trois mois. Ces éprouvettes ont été soumises à des essais de résistance mécanique, en plus, une étude de la structure interne est faite par essais de diffraction des rayons X et la mesure de la profondeur de la carbonatation (la zone de basicité réduite)(coloration au phénophtaléine). Cette étude a été réalisée en prenant en considération deux types de ciment à base d’ajout (pouzzolane (20%) et calcaire (15%)). Avec L’incorporation de deux types d’adjuvants super plastifiants Il est recherché, lors de cette étude, l’influence de deux types d’ajouts minéraux actif et inerte, finement broyés et incorporés, dans le mélange primaire (gypse+clinker+ajout), sur les caractéristiques physico mécanique et chimique des pâtes visant comme objectif la possibilité d’élaboration d’un béton résistant aux milieux agressifs. Mots clé:les sulfates, les acides, les chlorures, les nitrates d’ammonium, la pouzzolane,le

Citation

SaidaBOUALLEG , ,(2004); Effet des milieux agressifs sur les caractéristiques de durabilité des bétons et des matrices cimentaires,université de m'sila,

Ce travail consiste à caractériser les ajouts cimentaires tel que le laitier qui sont reconnus par leur faible réactivité et étudier leur comportement avec le ciment sous l’effet de plusieurs paramètres tel que le milieu de conservation, le teneur d’ajout, le dosage en eau. Le laitier combiné avec le ciment ordinaire, ainsi les résultats obtenus des avantages et des inconvénients .Ce travail expérimental a pour objectif d’évaluer expérimentalement l’influence de l’activation chimique sur les propriétés physiques, mécanique et la profondeur de carbonatation, de la pate de ciment et le laitier du mortier.

Citation

SaidaBOUALLEG , ,(2001); EFFET DE L 'ACTIVATION DU CIMENT SUR LA REPONSE MECANIQUE DU MORTIER,Université de M'sila,