Layachi Guelmine, Deboucha Sadek, H. Hadjab, A. Benazzouk
This study investigated the chemical compatibility of recycled rubber powder “RRP” with Portland cement by hydration test. Four mixes were prepared: pure cement paste and three rubber –cement pastes included 10%, 20%, and 30% of RRP. The compatibility of rubber - cement paste was evaluated by their temperature-time curves. The results of aptness and inhibitory index have shown that RRP rates higher than 10% was strongly inhibited the hydration reaction of cement. In addition, the setting time results revealed that rubber mixes require a longer curing time than pure cement paste, so the RRP could be used with cement-based materials as a setting retarder admixture. The recycling of rubber tire waste with cement-based materials could be reduced their accumulation in landfills and protects the natural and environment facing their harmful effects.
{"title":"Effect of Recycled Rubber Powder on the Compatibility of Rubber-Cement Paste","authors":"Layachi Guelmine, Deboucha Sadek, H. Hadjab, A. Benazzouk","doi":"10.18280/acsm.460304","DOIUrl":"https://doi.org/10.18280/acsm.460304","url":null,"abstract":"This study investigated the chemical compatibility of recycled rubber powder “RRP” with Portland cement by hydration test. Four mixes were prepared: pure cement paste and three rubber –cement pastes included 10%, 20%, and 30% of RRP. The compatibility of rubber - cement paste was evaluated by their temperature-time curves. The results of aptness and inhibitory index have shown that RRP rates higher than 10% was strongly inhibited the hydration reaction of cement. In addition, the setting time results revealed that rubber mixes require a longer curing time than pure cement paste, so the RRP could be used with cement-based materials as a setting retarder admixture. The recycling of rubber tire waste with cement-based materials could be reduced their accumulation in landfills and protects the natural and environment facing their harmful effects.","PeriodicalId":7877,"journal":{"name":"Annales de Chimie - Science des Matériaux","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75421891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The high-temperature mechanical behaviour of a glass and brick waste alkaline to synthesize geopolymer mortar was studied. The mortar in question contained 100% glass powder GWP and 90% of a blend of brick waste GBWP, brick waste BWP and a solid activator (10 mol concentration of NaOH mixed with glass water (Na2SiO3). The material was tested during exposure to high temperatures to establish its density, weight loss, compressive strength, accessible porosity in water, expansion of pastes, XRD and TG-DSC analysis using an innovative methodology to notch the hydrated geopolymers paste specimens after exposed to five maximum temperatures, 100℃, 200℃, 400℃, 600℃ and 800℃ without any imposed load during the heating. The results were found that GBWP gave better values in compressive strength, reaching 38.3 MPa at 100℃ and other proportional values at 400℃, 600℃ respectively compared with GWP. As for the density, the high temperature contributed to its decrease, which caused the presence of high porosity at 800℃. On the other hand, the high temperature helped to improve the mechanical and physical behavior of BWP, where the resistance reached 24.91 MPa at 200℃. In addition, for the microstructure and different particles related to the interactions were identified through the XRD and TG-DSC analysis procedure, in order to know the highest temperatures that allow changing the structure and properties of this type of alternative binders.
{"title":"Studying the Effect of High Temperature on the Content of Glass and Brick Waste Binders after Alkaline Activation","authors":"I. Y. Omri, Z. Rahmouni, N. Tebbal","doi":"10.18280/acsm.460302","DOIUrl":"https://doi.org/10.18280/acsm.460302","url":null,"abstract":"The high-temperature mechanical behaviour of a glass and brick waste alkaline to synthesize geopolymer mortar was studied. The mortar in question contained 100% glass powder GWP and 90% of a blend of brick waste GBWP, brick waste BWP and a solid activator (10 mol concentration of NaOH mixed with glass water (Na2SiO3). The material was tested during exposure to high temperatures to establish its density, weight loss, compressive strength, accessible porosity in water, expansion of pastes, XRD and TG-DSC analysis using an innovative methodology to notch the hydrated geopolymers paste specimens after exposed to five maximum temperatures, 100℃, 200℃, 400℃, 600℃ and 800℃ without any imposed load during the heating. The results were found that GBWP gave better values in compressive strength, reaching 38.3 MPa at 100℃ and other proportional values at 400℃, 600℃ respectively compared with GWP. As for the density, the high temperature contributed to its decrease, which caused the presence of high porosity at 800℃. On the other hand, the high temperature helped to improve the mechanical and physical behavior of BWP, where the resistance reached 24.91 MPa at 200℃. In addition, for the microstructure and different particles related to the interactions were identified through the XRD and TG-DSC analysis procedure, in order to know the highest temperatures that allow changing the structure and properties of this type of alternative binders.","PeriodicalId":7877,"journal":{"name":"Annales de Chimie - Science des Matériaux","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87455375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hichem Mebarki, Tayeb Kebir, M. Benguediab, H. Fekirini, B. Bouchouicha, F. Lebon
This study presents an experimental and computational analysis of fracture under mixed-mode conditions in aluminum alloy AA3003 using the Compact Tension Shear CTS specimen, both not welded and Friction stir welded. Mixed-mode fracture experiments were performed using the CTS specimen and an ARCAN loading device based on Richard's principle suitable for mixed-mode. The approach of linear elastic fracture mechanics allows for a better understanding of mixed-mode failure and the evaluation of the stress intensity parameters KI and KII. The variation of the stress intensity factor KI, KII is influenced by the pre-cracks length. The comparison between experimental results and the numerical results of simulation shows that there is a good agreement between these results.
{"title":"Experimental and Numerical Study of Fracture Behavior under Mixed-Mode of Al-Alloy AA3003 Not Welded and Welded by FSW Process","authors":"Hichem Mebarki, Tayeb Kebir, M. Benguediab, H. Fekirini, B. Bouchouicha, F. Lebon","doi":"10.18280/acsm.460301","DOIUrl":"https://doi.org/10.18280/acsm.460301","url":null,"abstract":"This study presents an experimental and computational analysis of fracture under mixed-mode conditions in aluminum alloy AA3003 using the Compact Tension Shear CTS specimen, both not welded and Friction stir welded. Mixed-mode fracture experiments were performed using the CTS specimen and an ARCAN loading device based on Richard's principle suitable for mixed-mode. The approach of linear elastic fracture mechanics allows for a better understanding of mixed-mode failure and the evaluation of the stress intensity parameters KI and KII. The variation of the stress intensity factor KI, KII is influenced by the pre-cracks length. The comparison between experimental results and the numerical results of simulation shows that there is a good agreement between these results.","PeriodicalId":7877,"journal":{"name":"Annales de Chimie - Science des Matériaux","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89790503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ramgopal Reddy Bijjam, Srinivas Chandanam, Govind Nandipati, Sneha H. Dhoria
Significance of composite materials is increasing enormously in the progress of modern science and technology. The composites can be transformed into suitable components with high precision by machining, which can be used for present day applications. Drilling is crucial operation that is often used in the assembly of composite parts to obtain finished product. But the drilling induced damage may affect the performance of the composite. The present work is focused on the impact of various parameters in drilling like feed rate, spindle speed and drill diameter on surface roughness and delamination of glass/hemp/bamboo fibers embedded polymer hybrid composites. The composite is prepared by hand layup method. The drilling on composite is done on a CNC drilling machine and the maximum diameter due to delamination is measured using profile projector. To optimize drilling parameters for the sake of reducing the surface roughness and delamination factor, Taguchi method applied. The measured results are analyzed using commercially available software package Minitab19. The analysis is carried out using ANOVA (Analysis of Variance). In order to obtain best optimal conditions GRA (Grey Relational Analysis) is adopted. The results show that among all important parameters, feed rate and drill diameter are more crucial for surface roughness, whereas delamination is impacted by feed rate and speed of spindle.
{"title":"Optimization of Machining Parameters in Drilling of Glass/Hemp/Bamboo Fibres Based Hybrid Polymer Composites","authors":"Ramgopal Reddy Bijjam, Srinivas Chandanam, Govind Nandipati, Sneha H. Dhoria","doi":"10.18280/acsm.460303","DOIUrl":"https://doi.org/10.18280/acsm.460303","url":null,"abstract":"Significance of composite materials is increasing enormously in the progress of modern science and technology. The composites can be transformed into suitable components with high precision by machining, which can be used for present day applications. Drilling is crucial operation that is often used in the assembly of composite parts to obtain finished product. But the drilling induced damage may affect the performance of the composite. The present work is focused on the impact of various parameters in drilling like feed rate, spindle speed and drill diameter on surface roughness and delamination of glass/hemp/bamboo fibers embedded polymer hybrid composites. The composite is prepared by hand layup method. The drilling on composite is done on a CNC drilling machine and the maximum diameter due to delamination is measured using profile projector. To optimize drilling parameters for the sake of reducing the surface roughness and delamination factor, Taguchi method applied. The measured results are analyzed using commercially available software package Minitab19. The analysis is carried out using ANOVA (Analysis of Variance). In order to obtain best optimal conditions GRA (Grey Relational Analysis) is adopted. The results show that among all important parameters, feed rate and drill diameter are more crucial for surface roughness, whereas delamination is impacted by feed rate and speed of spindle.","PeriodicalId":7877,"journal":{"name":"Annales de Chimie - Science des Matériaux","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84621543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The crack initiation and propagation often occur in structures subjected to fatigue loads and their privileged sites it is the geometric discontinuity in particular the notches. The geometric configuration of the notches always leads to disturbances of stress fields in the vicinity of the notch end as a consequence of the effects on the crack initiation site and on the crack rate. The present study is interested to the evolution of crack speed propagation in the notched specimens subjected to bending. The specimens chosen are made of PMMA material containing two opposite notches U or V that presented two different parameters, a radius for U-notch and angle for V-notch. The variations taken into account for the sharp notches (V-notch) going from the small angle to the large angle, which are 30°; 45°, 90°, and 140°, and for blunt notches (U-notch) the radius takes the different values 0.5, 1, 1.5, and 2 mm. The fracture brittle behavior adapted to this material led to predict the Fatigue crack growth using a modified form of Paris’s law with the equivalent stress intensity factor (ΔKeq) relying on extended finite element method (XFEM) in order to follow the interaction between the notch and the crack on one side and study the evolution of crack growth rate to another side. The variations, which brought to these parameters entailed an influence on the crack propagation speed, which was born at the end of notch of component as well as the variations of equivalent notch intensity stress factors (ΔKeq). The variations made to the parameters of notches have a huge influence on the crack propagation rate.
{"title":"Evolution of Crack Propagation Rate in Notched Specimens Using XFEM Method under Bending Load Condition","authors":"Souad Zergot, M. Moussaoui, B. E. Hachi","doi":"10.18280/acsm.460307","DOIUrl":"https://doi.org/10.18280/acsm.460307","url":null,"abstract":"The crack initiation and propagation often occur in structures subjected to fatigue loads and their privileged sites it is the geometric discontinuity in particular the notches. The geometric configuration of the notches always leads to disturbances of stress fields in the vicinity of the notch end as a consequence of the effects on the crack initiation site and on the crack rate. The present study is interested to the evolution of crack speed propagation in the notched specimens subjected to bending. The specimens chosen are made of PMMA material containing two opposite notches U or V that presented two different parameters, a radius for U-notch and angle for V-notch. The variations taken into account for the sharp notches (V-notch) going from the small angle to the large angle, which are 30°; 45°, 90°, and 140°, and for blunt notches (U-notch) the radius takes the different values 0.5, 1, 1.5, and 2 mm. The fracture brittle behavior adapted to this material led to predict the Fatigue crack growth using a modified form of Paris’s law with the equivalent stress intensity factor (ΔKeq) relying on extended finite element method (XFEM) in order to follow the interaction between the notch and the crack on one side and study the evolution of crack growth rate to another side. The variations, which brought to these parameters entailed an influence on the crack propagation speed, which was born at the end of notch of component as well as the variations of equivalent notch intensity stress factors (ΔKeq). The variations made to the parameters of notches have a huge influence on the crack propagation rate.","PeriodicalId":7877,"journal":{"name":"Annales de Chimie - Science des Matériaux","volume":"146 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77426195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Khaled Boulaiche, K. Boudeghdegh, Sofiane Haddad, A. Roula, Hichem Alioui
In this study, the effect of substitution of feldspar by soda-lime glass waste (SLGW), on rheological behavior, thermal, physical-mechanical and structural properties of sanitary-ware vitreous china (VC) bodies, has been evaluated. The findings show a positive effect on the rheological behavior of the slip, to viscosity, thixotropy, density and casting process. Indeed, during the firing stage at 1230°C, the use of 20 wt. % of SLGW in the composition of VC bodies, improved Bulk density (2 to 2.52 g/cm3), reduced water absorption (0.35 to 0.02%), and increased flexural strength (33 to 51 MPa). The fired samples were characterized using X-ray diffraction, SEM and FTIR analysis; results indicate that Mullite and Quartz are the major phases, with a little presence of anorthite phase formed by SLGW additions. From TGA/DTG analysis, it was found that the use of SLGW (15 wt. %) reduces mass loss of VC bodies (8.83 to 8.53%). These positive results open new horizons for using this waste, as a sound environmental, technological and economic solution.
{"title":"Valorisation of Industrial Soda-Lime Glass Waste and Its Effect on the Rheological Behavior, Physical-Mechanical and Structural Properties of Sanitary Ceramic Vitreous Bodies","authors":"Khaled Boulaiche, K. Boudeghdegh, Sofiane Haddad, A. Roula, Hichem Alioui","doi":"10.18280/acsm.460306","DOIUrl":"https://doi.org/10.18280/acsm.460306","url":null,"abstract":"In this study, the effect of substitution of feldspar by soda-lime glass waste (SLGW), on rheological behavior, thermal, physical-mechanical and structural properties of sanitary-ware vitreous china (VC) bodies, has been evaluated. The findings show a positive effect on the rheological behavior of the slip, to viscosity, thixotropy, density and casting process. Indeed, during the firing stage at 1230°C, the use of 20 wt. % of SLGW in the composition of VC bodies, improved Bulk density (2 to 2.52 g/cm3), reduced water absorption (0.35 to 0.02%), and increased flexural strength (33 to 51 MPa). The fired samples were characterized using X-ray diffraction, SEM and FTIR analysis; results indicate that Mullite and Quartz are the major phases, with a little presence of anorthite phase formed by SLGW additions. From TGA/DTG analysis, it was found that the use of SLGW (15 wt. %) reduces mass loss of VC bodies (8.83 to 8.53%). These positive results open new horizons for using this waste, as a sound environmental, technological and economic solution.","PeriodicalId":7877,"journal":{"name":"Annales de Chimie - Science des Matériaux","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76366983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Idir Ben Saidj, M. Nedjar, S. Hocine, Ferhat Belabbas
Polymers have always played a big role in the insulation of electrical machines and have been the focus of several studies when they are subjected to different stresses. The humidity and temperature are the main constraints that degrade the insulating performance of the materials when they act together causing hydrothermal aging of the polymers. This study deals with the influence of hydrothermal aging on the breakdown voltage of polyesterimide which is known as one of the most important factors which define the electrical insulation performance of the polymer. The breakdown test was executed under AC and DC voltage. A statistical analysis of breakdown data was carried out using the two-parameter Weibull distribution. According to the findings, the breakdown voltage changes with aging time. Its rise is due to a polymer crosslinking by thermal action, causing a reduction of the mean-free path of charge carriers decreasing their mobility. The decline is attributed to the material plasticization after water penetration into the polymer matrix at the beginning of aging, which is a physical effect. Eventually, the chemical effect reflects the hydrolysis reaction, which destroys the hydrogenous links of the polymer. The breakdown voltage under the DC ramp is higher than that obtained under the AC ramp. The DC breakdown voltage depends on the polarity of the applied electrical field. The polymer degradation is characterized by a change in color and the crumbling of samples.
{"title":"Effects of Hydrothermal Aging on the Breakdown Voltage of Polyesterimide","authors":"Idir Ben Saidj, M. Nedjar, S. Hocine, Ferhat Belabbas","doi":"10.18280/acsm.460205","DOIUrl":"https://doi.org/10.18280/acsm.460205","url":null,"abstract":"Polymers have always played a big role in the insulation of electrical machines and have been the focus of several studies when they are subjected to different stresses. The humidity and temperature are the main constraints that degrade the insulating performance of the materials when they act together causing hydrothermal aging of the polymers. This study deals with the influence of hydrothermal aging on the breakdown voltage of polyesterimide which is known as one of the most important factors which define the electrical insulation performance of the polymer. The breakdown test was executed under AC and DC voltage. A statistical analysis of breakdown data was carried out using the two-parameter Weibull distribution. According to the findings, the breakdown voltage changes with aging time. Its rise is due to a polymer crosslinking by thermal action, causing a reduction of the mean-free path of charge carriers decreasing their mobility. The decline is attributed to the material plasticization after water penetration into the polymer matrix at the beginning of aging, which is a physical effect. Eventually, the chemical effect reflects the hydrolysis reaction, which destroys the hydrogenous links of the polymer. The breakdown voltage under the DC ramp is higher than that obtained under the AC ramp. The DC breakdown voltage depends on the polarity of the applied electrical field. The polymer degradation is characterized by a change in color and the crumbling of samples.","PeriodicalId":7877,"journal":{"name":"Annales de Chimie - Science des Matériaux","volume":"687 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76877530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Ziani, Sadek Deboucha, Abderrachid Amriou, Hayat Touati, Inès Kebaili
The use of recycled waste in road construction is part of the sustainable development of countries. Plastic waste poses an ecological problem because it is not biodegradable. Recycling this waste to reuse it in different areas seems to be a solution to reduce it. This article is devoted to the use of varieties of additions of recycled plastic waste (RPW) (5 and 10%) without and with Portland cement compound (PCC) (2 and 4%) moistened at the Proctor optimum, to stabilize the foundation layer of the section of the road connecting the highway at the Tixter dry port (Algeria). The results showed, that RPW increases the CBR (California Bearing Ration) of S0 approximately to 139.32%, however the use of 5% of RPW with 2% of PCC raises the CBR of the soil to 386.59% in unsoaked samples and 404.54% in soaked samples. Whereas, UCS (Unconfined Compressive Strength) tests, is marked by increases in compressive strength from 0 to1471.18 KPa and from 754.67KPa to 2051.53KPa of samples dosed with 5% RPW and 4% PCC, soaked and unsoaked respectively. This study offers the opportunity to find the right soil-RPW-PCC combination to stabilize future roads.
{"title":"Influence of Recycled Plastic Waste and Cement on Pavement Sub-Base Stabilization","authors":"H. Ziani, Sadek Deboucha, Abderrachid Amriou, Hayat Touati, Inès Kebaili","doi":"10.18280/acsm.460201","DOIUrl":"https://doi.org/10.18280/acsm.460201","url":null,"abstract":"The use of recycled waste in road construction is part of the sustainable development of countries. Plastic waste poses an ecological problem because it is not biodegradable. Recycling this waste to reuse it in different areas seems to be a solution to reduce it. This article is devoted to the use of varieties of additions of recycled plastic waste (RPW) (5 and 10%) without and with Portland cement compound (PCC) (2 and 4%) moistened at the Proctor optimum, to stabilize the foundation layer of the section of the road connecting the highway at the Tixter dry port (Algeria). The results showed, that RPW increases the CBR (California Bearing Ration) of S0 approximately to 139.32%, however the use of 5% of RPW with 2% of PCC raises the CBR of the soil to 386.59% in unsoaked samples and 404.54% in soaked samples. Whereas, UCS (Unconfined Compressive Strength) tests, is marked by increases in compressive strength from 0 to1471.18 KPa and from 754.67KPa to 2051.53KPa of samples dosed with 5% RPW and 4% PCC, soaked and unsoaked respectively. This study offers the opportunity to find the right soil-RPW-PCC combination to stabilize future roads.","PeriodicalId":7877,"journal":{"name":"Annales de Chimie - Science des Matériaux","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86780011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Makhloufi, S. Hachani, Asma Fettah, Bahia Messai
The present scientific contribution aims to elaborate antimony oxychloride Sb4O5Cl2 via a wet chemistry method and to study its photocatalytic activity to degrade methylene blue and crystal violet cationic dyes. The prepared samples were characterized using powder X-ray diffraction PXRD, Fourier transform infrared spectroscopy FTIR, Scanning electron microscopy analysis SEM and UV-Visible measurements. PXRD results revealed that the Sb4O5Cl2 was successfully formed in a monoclinic phase structure with P21/a space group. FTIR results show the presence of all characteristic bands that distinguished the prepared compound mainly include Sb−O, Sb−O−Sb, and Sb=O vibrating modes bands located at 503, 607, and 832 cm-1, respectively. SEM micrograph showed that the microstructure of the prepared antimony oxychloride is composed of particles with sand rose morphology. UV-Visible outcomes demonstrated that our synthesized Sb4O5Cl2 is an efficient photocatalyst for the degradation of both methylene blue MB and crystal violet CV targeted dyes. MB degradation reached 93.67% after 30 min while CV degradation up to 92.56% after 360 min.
{"title":"Wet Chemical Synthesis of Sb4O5Cl2 Used as an Effective Photocatalyst for Methylene Blue and Crystal Violet Degradation under Visible Light Irradiation","authors":"R. Makhloufi, S. Hachani, Asma Fettah, Bahia Messai","doi":"10.18280/acsm.460202","DOIUrl":"https://doi.org/10.18280/acsm.460202","url":null,"abstract":"The present scientific contribution aims to elaborate antimony oxychloride Sb4O5Cl2 via a wet chemistry method and to study its photocatalytic activity to degrade methylene blue and crystal violet cationic dyes. The prepared samples were characterized using powder X-ray diffraction PXRD, Fourier transform infrared spectroscopy FTIR, Scanning electron microscopy analysis SEM and UV-Visible measurements. PXRD results revealed that the Sb4O5Cl2 was successfully formed in a monoclinic phase structure with P21/a space group. FTIR results show the presence of all characteristic bands that distinguished the prepared compound mainly include Sb−O, Sb−O−Sb, and Sb=O vibrating modes bands located at 503, 607, and 832 cm-1, respectively. SEM micrograph showed that the microstructure of the prepared antimony oxychloride is composed of particles with sand rose morphology. UV-Visible outcomes demonstrated that our synthesized Sb4O5Cl2 is an efficient photocatalyst for the degradation of both methylene blue MB and crystal violet CV targeted dyes. MB degradation reached 93.67% after 30 min while CV degradation up to 92.56% after 360 min.","PeriodicalId":7877,"journal":{"name":"Annales de Chimie - Science des Matériaux","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81314519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
One of the essential purposes of the automotive chassis is to maintain the vehicle's shape and bear the various loads applied to the vehicle. When a heavy-duty vehicle, e.g., a truck, travels on the road, the chassis is subject to vibrations produced by surface roughness and excitation due to the vibration of body parts. The present study aims to design, model, and perform a static structural & vibrational modal analysis on a commercial vehicle (Truck) chassis considering both conventional Structural steel and P100/6061 Al Metal Metrix Composite (MMC) using ANSYS CFX to determine the strength of chassis with transverse sections. Free vibrational modal analysis determines the mass participation factor and resonance frequency for square section and C section, respectively, for both materials using the finite element technique. It was observed that the use of the C section causes an increase in deformation for all the natural frequencies, which is not preferred. The high mass participation factor along the x-direction signifies that any external excitation along this direction would likely cause resonance and amplitude build-up. The C section profile of the chassis shows 1.69% higher deformation than the square section in both cases; hence it is not desirable for the design.
{"title":"Investigation of Dynamic Factors in Different Sections of HVC by Static and Free Vibration Modal Analysis","authors":"A. Agarwal, Linda Mthembu","doi":"10.18280/acsm.460203","DOIUrl":"https://doi.org/10.18280/acsm.460203","url":null,"abstract":"One of the essential purposes of the automotive chassis is to maintain the vehicle's shape and bear the various loads applied to the vehicle. When a heavy-duty vehicle, e.g., a truck, travels on the road, the chassis is subject to vibrations produced by surface roughness and excitation due to the vibration of body parts. The present study aims to design, model, and perform a static structural & vibrational modal analysis on a commercial vehicle (Truck) chassis considering both conventional Structural steel and P100/6061 Al Metal Metrix Composite (MMC) using ANSYS CFX to determine the strength of chassis with transverse sections. Free vibrational modal analysis determines the mass participation factor and resonance frequency for square section and C section, respectively, for both materials using the finite element technique. It was observed that the use of the C section causes an increase in deformation for all the natural frequencies, which is not preferred. The high mass participation factor along the x-direction signifies that any external excitation along this direction would likely cause resonance and amplitude build-up. The C section profile of the chassis shows 1.69% higher deformation than the square section in both cases; hence it is not desirable for the design.","PeriodicalId":7877,"journal":{"name":"Annales de Chimie - Science des Matériaux","volume":"559 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77203326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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