Received: 19 March 2020 Accepted: 8 June 2020 With the recent construction boom, the stability of earth-rock aggregate (ERA) structures become a prominent problem. The ERA is essentially a heterogenous aggregate of randomly stacked particles of varied sizes, the gaps between which are filled with liquid and gas phases. However, the existing theories on geotechnical mechanics cannot accurately describe the mechanical behavior of this special material. To solve the problem, this paper treats the ERA as a set of as a set of randomly stacked spheres, which are equivalent to soil and rock particles in the ERA and have the same radius and material properties. Drawing on the particle contact theory, the total number of coarse particles in the ERA was calculated by the probability density function relative to the mean particle size (sieve diameter), followed by derivation of the equivalent radius of coarse particles. Next, the particle shape correction coefficient (PSCC) was introduced to obtain the equivalent shear modulus of the ERA, according to the relationship between mean stress in the ERA and the micro-contact force between particles. After that, the microscale formula of shear wave velocity was deduced from the macroscale formula. Finally, the effects of multiple parameters on shear wave velocity were quantified in details. The results show that the shear wave velocity of the ERA is greatly affected by the void ratio, elastic modulus, and the PSCC, but has little to do with effective internal friction angle, Poisson’s ratio, and coordination number of the ERA particles.
{"title":"A Microscale Shear Wave Velocity Model of Earth-Rock Aggregate","authors":"Fei Zhang, Lixia Zhou, X. Sun, Peng Yuan","doi":"10.18280/acsm.440310","DOIUrl":"https://doi.org/10.18280/acsm.440310","url":null,"abstract":"Received: 19 March 2020 Accepted: 8 June 2020 With the recent construction boom, the stability of earth-rock aggregate (ERA) structures become a prominent problem. The ERA is essentially a heterogenous aggregate of randomly stacked particles of varied sizes, the gaps between which are filled with liquid and gas phases. However, the existing theories on geotechnical mechanics cannot accurately describe the mechanical behavior of this special material. To solve the problem, this paper treats the ERA as a set of as a set of randomly stacked spheres, which are equivalent to soil and rock particles in the ERA and have the same radius and material properties. Drawing on the particle contact theory, the total number of coarse particles in the ERA was calculated by the probability density function relative to the mean particle size (sieve diameter), followed by derivation of the equivalent radius of coarse particles. Next, the particle shape correction coefficient (PSCC) was introduced to obtain the equivalent shear modulus of the ERA, according to the relationship between mean stress in the ERA and the micro-contact force between particles. After that, the microscale formula of shear wave velocity was deduced from the macroscale formula. Finally, the effects of multiple parameters on shear wave velocity were quantified in details. The results show that the shear wave velocity of the ERA is greatly affected by the void ratio, elastic modulus, and the PSCC, but has little to do with effective internal friction angle, Poisson’s ratio, and coordination number of the ERA particles.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"9 1","pages":"223-229"},"PeriodicalIF":0.8,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88555520","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}
Received: 28 April 2020 Accepted: 13 May 2020 The precipitation kinetics and mechanisms of 6000 series aluminium alloys (6082 and 6061 alloys) are studied through the changes in the electrical conductivity. This is supplemented by hardness measurements. The Johnson – Mehl – Avrami – Kolmogorov (JMAK) and Austin – Rickett (AR) models are applied to the results of the electrical conductivity measurements carried out on the two aluminum alloys allowing their parameters to be identified. These two models offer a good representation of the precipitation kinetics of the two aluminum alloys. They were also used to calculate the activation energies for the transformations by applying the Arrhenius equation. The activation energies obtained are consistent with the data in the literature. Finally, two partial time – temperature – precipitation (TTP) diagrams are created for the 6082 and 6061 alloys. A comparison of the information obtained from these diagrams and the Transmission Electron Microscopy (TEM) examinations is proposed for these two aluminium alloys and thus makes it possible to find a good match.
{"title":"Study of the Precipitation Kinetics and Mechanisms in 6000 Series Aluminium Alloys Through the Measurement of Electrical Conductivity","authors":"A. Mauduit, Hervé Gransac","doi":"10.18280/acsm.440301","DOIUrl":"https://doi.org/10.18280/acsm.440301","url":null,"abstract":"Received: 28 April 2020 Accepted: 13 May 2020 The precipitation kinetics and mechanisms of 6000 series aluminium alloys (6082 and 6061 alloys) are studied through the changes in the electrical conductivity. This is supplemented by hardness measurements. The Johnson – Mehl – Avrami – Kolmogorov (JMAK) and Austin – Rickett (AR) models are applied to the results of the electrical conductivity measurements carried out on the two aluminum alloys allowing their parameters to be identified. These two models offer a good representation of the precipitation kinetics of the two aluminum alloys. They were also used to calculate the activation energies for the transformations by applying the Arrhenius equation. The activation energies obtained are consistent with the data in the literature. Finally, two partial time – temperature – precipitation (TTP) diagrams are created for the 6082 and 6061 alloys. A comparison of the information obtained from these diagrams and the Transmission Electron Microscopy (TEM) examinations is proposed for these two aluminium alloys and thus makes it possible to find a good match.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"25 1","pages":"141-149"},"PeriodicalIF":0.8,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81812345","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}
Received: 24 February 2020 Accepted: 13 May 2020 Population growth and urbanisation have resulted in exploitation of natural resources, anomalous climate change and environmental pollution. Thus, there is a need for the development of new construction techniques that will not only ensure the preservation of natural resources but at the same time will focus in making a building that is energy efficient and environment friendly. Light transmitting concrete aims to meet such requirement which helps in bringing the minimisation of artificial energy usage by directly allowing the sunlight to project through a concrete material. This paper deals with the study of mechanical and optical properties of light transmitting concrete produced by the inclusion of 2mm diameter plastic optical fiber with four different densities in a concrete cube of dimension 150mmx150mmx150mm.The experimental results show that mechanical strength of concrete mixes containing plastic optical fiber (7x7) increases by 15.057% with light transmission intensity of 69lux greater than conventional concrete at 28 day age. Study also focused on evaluation of Rebound Hammer test results for concrete incorporated with Plastic Optical Fiber. Moreover, the stress-strain relationship showing actual behaviour of fiber concrete under compression is highlight in study. Based on the results it is concluded that the presence of plastic optical fiber in concrete material does not impair its mechanical properties and it represents a new way to harness the sun’s energy because of its excellent light transmission capacity.
{"title":"Structural and Luminance Properties of Light Transmitting Concrete","authors":"N. Shahmir, Mehwish Bhat","doi":"10.18280/acsm.440305","DOIUrl":"https://doi.org/10.18280/acsm.440305","url":null,"abstract":"Received: 24 February 2020 Accepted: 13 May 2020 Population growth and urbanisation have resulted in exploitation of natural resources, anomalous climate change and environmental pollution. Thus, there is a need for the development of new construction techniques that will not only ensure the preservation of natural resources but at the same time will focus in making a building that is energy efficient and environment friendly. Light transmitting concrete aims to meet such requirement which helps in bringing the minimisation of artificial energy usage by directly allowing the sunlight to project through a concrete material. This paper deals with the study of mechanical and optical properties of light transmitting concrete produced by the inclusion of 2mm diameter plastic optical fiber with four different densities in a concrete cube of dimension 150mmx150mmx150mm.The experimental results show that mechanical strength of concrete mixes containing plastic optical fiber (7x7) increases by 15.057% with light transmission intensity of 69lux greater than conventional concrete at 28 day age. Study also focused on evaluation of Rebound Hammer test results for concrete incorporated with Plastic Optical Fiber. Moreover, the stress-strain relationship showing actual behaviour of fiber concrete under compression is highlight in study. Based on the results it is concluded that the presence of plastic optical fiber in concrete material does not impair its mechanical properties and it represents a new way to harness the sun’s energy because of its excellent light transmission capacity.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"18 1","pages":"185-190"},"PeriodicalIF":0.8,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86210719","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}
{"title":"Flexural Behaviour of Precast Steel Fibres Reinforces Concrete Composite Slabs with Different Shapes","authors":"B. Luo","doi":"10.18280/acsm.440307","DOIUrl":"https://doi.org/10.18280/acsm.440307","url":null,"abstract":"","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"46 1","pages":"199-209"},"PeriodicalIF":0.8,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73612320","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}
Omar Belguendouz, B. Mebarek, M. Keddam, Yassine El Guerri
Received: 25 October 2019 Accepted: 11 May 2020 In this work, we developed a diffusion model based on the second Fick’s law and the solving of the mass balance equations of the (FeB/Fe2B) interface to simulate the boronizing kinetics in the case of bilayer configuration (FeB/Fe2B) formed on AISI D2 steel. It is known that the boronizing process is a thermochemical surface treatment generally carried out at temperatures ranging between 1223 K and 1323 K. The knowledge of the temperature and the processing time are necessary to simulate and optimize the boronizing process. The developed model in this study is used to estimate the value of the growth rate constant in each phase, to simulate the boride layer thickness formed on AISI D2 steel, to determine the boron concentration profile and to evaluate the mass gain at the surface of the borided AISI D2 steel. To validate the developed model, we used the experimental data taken from the literature concerning the layers thicknesses of FeB and Fe2B layers obtained for different process parameters. Finally, these experimental values are compared to the calculated results. A good agreement was observed between the simulated results and the experimental data.
{"title":"Diffusion Model for Simulating the Kinetics of Boronizing Process in the Case of FeB/Fe2B Bilayer Configuration","authors":"Omar Belguendouz, B. Mebarek, M. Keddam, Yassine El Guerri","doi":"10.18280/acsm.440306","DOIUrl":"https://doi.org/10.18280/acsm.440306","url":null,"abstract":"Received: 25 October 2019 Accepted: 11 May 2020 In this work, we developed a diffusion model based on the second Fick’s law and the solving of the mass balance equations of the (FeB/Fe2B) interface to simulate the boronizing kinetics in the case of bilayer configuration (FeB/Fe2B) formed on AISI D2 steel. It is known that the boronizing process is a thermochemical surface treatment generally carried out at temperatures ranging between 1223 K and 1323 K. The knowledge of the temperature and the processing time are necessary to simulate and optimize the boronizing process. The developed model in this study is used to estimate the value of the growth rate constant in each phase, to simulate the boride layer thickness formed on AISI D2 steel, to determine the boron concentration profile and to evaluate the mass gain at the surface of the borided AISI D2 steel. To validate the developed model, we used the experimental data taken from the literature concerning the layers thicknesses of FeB and Fe2B layers obtained for different process parameters. Finally, these experimental values are compared to the calculated results. A good agreement was observed between the simulated results and the experimental data.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"64 1","pages":"191-197"},"PeriodicalIF":0.8,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89151660","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}
Received: 18 March 2020 Accepted: 3 June 2020 Energy saving is an important measure for the sustainable of opencast mining industry. However, the energy saving operation of crushing station is affected by vibration and collision in the process of open pit mining. This research aims to explore a novel strategy to reduce the high energy consumption of crushing station. Discrete element method (DEM), particle contact model and multiscale viscous particle model were used to analyse the operation process of crushing station. A multiparameter coupling coordinated speed regulation crushing strategy was proposed combined with the crusher model and simulation parameters. The practical application of this strategy in the crushing station of Shenbao energy open pit mine has been verified. The application results showed that compared with the manual operation control, the crushing efficiency of the crushing station is increased by 21.80%, the powder passing rate is reduced by 53.35%, and the operation energy saving of the crushing station is about 41.00%. The energy saving effect of multiparameter optimization is better than that of single parameter. This research provides a new theoretical basis for energy saving operation of crushing station in open pit mine.
{"title":"A Novel Energy Saving Operation Strategy of Multiparameter Coupling Coordinated Speed Regulation for Crushing","authors":"Enhua Luo, Wei Zhang, Rui-xin Zhang, Yu Liu, Xiaomin Liu, Changlong Wang","doi":"10.18280/acsm.440303","DOIUrl":"https://doi.org/10.18280/acsm.440303","url":null,"abstract":"Received: 18 March 2020 Accepted: 3 June 2020 Energy saving is an important measure for the sustainable of opencast mining industry. However, the energy saving operation of crushing station is affected by vibration and collision in the process of open pit mining. This research aims to explore a novel strategy to reduce the high energy consumption of crushing station. Discrete element method (DEM), particle contact model and multiscale viscous particle model were used to analyse the operation process of crushing station. A multiparameter coupling coordinated speed regulation crushing strategy was proposed combined with the crusher model and simulation parameters. The practical application of this strategy in the crushing station of Shenbao energy open pit mine has been verified. The application results showed that compared with the manual operation control, the crushing efficiency of the crushing station is increased by 21.80%, the powder passing rate is reduced by 53.35%, and the operation energy saving of the crushing station is about 41.00%. The energy saving effect of multiparameter optimization is better than that of single parameter. This research provides a new theoretical basis for energy saving operation of crushing station in open pit mine.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"1 1","pages":"161-178"},"PeriodicalIF":0.8,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77299295","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}
Received: 16 January 2020 Accepted: 20 March 2020 The aim of this research is to study four samples using the fluoroplastic scanning calorimeter which contain different concentrations of thermally extended graphite (GTD) in different dispersions. We noticed that the heating speed plays a very important role. Increasing the heating speed from 5 to 10 then 15 °C/min, changes the thermal behavior of an infinitesimally small compound regardless of the concentration and/or dispersion. All curves each contain an anomaly in the calorimetric curves. The shape of the latter, its energizing energy, and its intensity depend on the concentration and dispersion. The temperature of anomalies in the calorimeter curve changes from one sample to another. We have shown that nanomaterials that contain the smallest GTD concentration with high dispersion and heat up at the highest heating speed deteriorate at high temperatures. It is more resistant to thermal shocks. One of the interesting results of this work the introduction of an amount of GTD in to the polymer improves the thermal properties of the infinitesimal compound, and its use becomes possible in a wide range of temperature.
{"title":"Determination of the Diffusion Coefficient and the Activation Energy of Fluoroplastics","authors":"Lakel Abdelghani","doi":"10.18280/acsm.440309","DOIUrl":"https://doi.org/10.18280/acsm.440309","url":null,"abstract":"Received: 16 January 2020 Accepted: 20 March 2020 The aim of this research is to study four samples using the fluoroplastic scanning calorimeter which contain different concentrations of thermally extended graphite (GTD) in different dispersions. We noticed that the heating speed plays a very important role. Increasing the heating speed from 5 to 10 then 15 °C/min, changes the thermal behavior of an infinitesimally small compound regardless of the concentration and/or dispersion. All curves each contain an anomaly in the calorimetric curves. The shape of the latter, its energizing energy, and its intensity depend on the concentration and dispersion. The temperature of anomalies in the calorimeter curve changes from one sample to another. We have shown that nanomaterials that contain the smallest GTD concentration with high dispersion and heat up at the highest heating speed deteriorate at high temperatures. It is more resistant to thermal shocks. One of the interesting results of this work the introduction of an amount of GTD in to the polymer improves the thermal properties of the infinitesimal compound, and its use becomes possible in a wide range of temperature.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"os-32 1","pages":"217-222"},"PeriodicalIF":0.8,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86080307","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}
Received: 25 February 2020 Accepted: 10 April 2020 During coating, the post-baking phase of the coated material has shown maximum impact on the fracture toughness and the parameters during the coating process have shown their own influence during the heat-treating the materials. To know the effect of this, the experiments are done on the age hardened specimens. Age hardening of aluminum is carried out in the following ways; one by varying the temperature of aging and the other by varying the time of aging. The results found from both the experimental and the fractographic analysis have shown that, the variation in the fracture toughness of the materials is mainly due to the changes found in the grain structure of the materials. The results obtained during the experiments have shown that, the fracture behavior of the coated and heat-treated aluminum a material is changed significantly.
{"title":"Effects of Aging Temperature, Time During Transition from Brittle to Ductile on Fracture Behavior of Zinc Coated AA7075","authors":"R. Manjunath, D. Kumar","doi":"10.18280/acsm.440308","DOIUrl":"https://doi.org/10.18280/acsm.440308","url":null,"abstract":"Received: 25 February 2020 Accepted: 10 April 2020 During coating, the post-baking phase of the coated material has shown maximum impact on the fracture toughness and the parameters during the coating process have shown their own influence during the heat-treating the materials. To know the effect of this, the experiments are done on the age hardened specimens. Age hardening of aluminum is carried out in the following ways; one by varying the temperature of aging and the other by varying the time of aging. The results found from both the experimental and the fractographic analysis have shown that, the variation in the fracture toughness of the materials is mainly due to the changes found in the grain structure of the materials. The results obtained during the experiments have shown that, the fracture behavior of the coated and heat-treated aluminum a material is changed significantly.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"14 1","pages":"211-216"},"PeriodicalIF":0.8,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91105484","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}
Received: 26 February 2020 Accepted: 19 March 2020 Perovskite-based solar cell knowledge has been a very attractive field of investigation in late years. It is a smart and appropriate material for the production of low prices, great efficiency, and sustainable photovoltaic cell. Perovskite-based solar cell modeling was performed in this study. Electrical and Optical Simulation of Hybrid Perovskite Solar Cell CH3NH3PbI3 was considered at different electron transport material ETM layers and light intensity by using the GPVDM Model at room temperature. To understand the effect of ETM layers on the performance of perovskite solar cells, various electron transport materials, including (ETMs = PCBM, SiO2, ZnO, TiO2, ZnSe). The role of light intensity has been considered on the solar cell parameters (short-circuit photocurrent density, open-circuit voltage, fill factor, percent conversion efficiency, and maximum power). Also, the comparison between the special effects of regular and inverted structure device of architecture is examined. The results will contribute imperative standards and achievable directions for the production of higher efficiency Perovskite-based solar cells.
{"title":"Electrical and Optical Simulation of Hybrid Perovskite-Based Solar Cell at Various Electron Transport Materials and Light Intensity","authors":"Abdel-baset H. Mekky","doi":"10.18280/acsm.440304","DOIUrl":"https://doi.org/10.18280/acsm.440304","url":null,"abstract":"Received: 26 February 2020 Accepted: 19 March 2020 Perovskite-based solar cell knowledge has been a very attractive field of investigation in late years. It is a smart and appropriate material for the production of low prices, great efficiency, and sustainable photovoltaic cell. Perovskite-based solar cell modeling was performed in this study. Electrical and Optical Simulation of Hybrid Perovskite Solar Cell CH3NH3PbI3 was considered at different electron transport material ETM layers and light intensity by using the GPVDM Model at room temperature. To understand the effect of ETM layers on the performance of perovskite solar cells, various electron transport materials, including (ETMs = PCBM, SiO2, ZnO, TiO2, ZnSe). The role of light intensity has been considered on the solar cell parameters (short-circuit photocurrent density, open-circuit voltage, fill factor, percent conversion efficiency, and maximum power). Also, the comparison between the special effects of regular and inverted structure device of architecture is examined. The results will contribute imperative standards and achievable directions for the production of higher efficiency Perovskite-based solar cells.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"51 1","pages":"179-184"},"PeriodicalIF":0.8,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90462563","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}
Received: 22 November 2019 Accepted: 12 February 2020 High strength concrete is very widely used today to support the construction of buildings, roads, dams, bridges and so on. To make high quality concrete, additional material is needed as a concrete mixture, the added material today is very much in the market as well as added ingredients derived from fly ash, and rice husk, especially rice husk is most widely used as a mixture in making concrete, due to the chemical content of SiO2 contained in rice husk ash. In this study we made high strength concrete using ash derived from waste paper. Paper ash was burned manually and then filtered using sieve number 150. Paper ash was then tested for its chemical content. The results of the chemical content test derived from paper waste ash have a CaO of 92.70 while SiO2 is only 2.63%. The making of test specimens was made as many as 90 pieces with some additional variations of noble ash from 0%, 5%, 10%, 15%, 20%, and 25%. Concrete compressive strength test results with a code of 0% could not achieve the quality plan of 45 MPa, while the addition of ash by 5% reached 41 MPa compressive strength more, the highest compressive strength produced by a mixture of 10% paper ash which achieved a compressive strength of more than 45 MPa plan. Whereas specimens with a mixture of 15%, 20%, and 25% produce concrete with compressive strength below 36 MPa. From the results of the study it can be concluded that the use of 5% and 10% waste paper ash can increase the compressive strength of concrete. Ash from paper waste can be an alternative material added to the concrete mixture.
{"title":"Waste Paper Ash as Additives for High Strength Concrete Mix 45 MPa","authors":"Subanndi, F. Agustina, Vebrian, Rafidah Azzahra","doi":"10.18280/acsm.440203","DOIUrl":"https://doi.org/10.18280/acsm.440203","url":null,"abstract":"Received: 22 November 2019 Accepted: 12 February 2020 High strength concrete is very widely used today to support the construction of buildings, roads, dams, bridges and so on. To make high quality concrete, additional material is needed as a concrete mixture, the added material today is very much in the market as well as added ingredients derived from fly ash, and rice husk, especially rice husk is most widely used as a mixture in making concrete, due to the chemical content of SiO2 contained in rice husk ash. In this study we made high strength concrete using ash derived from waste paper. Paper ash was burned manually and then filtered using sieve number 150. Paper ash was then tested for its chemical content. The results of the chemical content test derived from paper waste ash have a CaO of 92.70 while SiO2 is only 2.63%. The making of test specimens was made as many as 90 pieces with some additional variations of noble ash from 0%, 5%, 10%, 15%, 20%, and 25%. Concrete compressive strength test results with a code of 0% could not achieve the quality plan of 45 MPa, while the addition of ash by 5% reached 41 MPa compressive strength more, the highest compressive strength produced by a mixture of 10% paper ash which achieved a compressive strength of more than 45 MPa plan. Whereas specimens with a mixture of 15%, 20%, and 25% produce concrete with compressive strength below 36 MPa. From the results of the study it can be concluded that the use of 5% and 10% waste paper ash can increase the compressive strength of concrete. Ash from paper waste can be an alternative material added to the concrete mixture.","PeriodicalId":7897,"journal":{"name":"Annales De Chimie-science Des Materiaux","volume":"53 1","pages":"91-96"},"PeriodicalIF":0.8,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76264479","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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