Ioana-Francesca Prada Hanga-Fărcaş, C. Bungău, A. Scurt, Monica Cristea, M. Prada
Abstract The study is part of humanity's current concerns of tempering climate change for sustainable development, in the context where the construction sector is responsible for a significant percentage of greenhouse gas emissions. In the present work, through a rigorous documentation, the authors synthesize several existing green and sustainable building certification systems. Extending the study from buildings to green neighbourhoods, to university campuses and even to green cities, models of their sustainable development are highlighted. The authors summarize the results of the various "green" ratings, initiating "Top 10 Greenest Universities in the world", demonstrating the interest of certification and classification. The paper presents the case study of the University of Oradea. From this perspective, participation in a rating of green campuses, as well as certification of buildings, are stimulating elements for approaching a sustainable development strategy. Thus, with the registration in the UI GreenMetric World University Rankings, the University of Oradea is set to rise in the ranking, which actually led to the improvement of the green criteria and implicitly to an orientation towards a sustainable development of the university campus. At the same time, the paper demonstrates that the energy certification of old buildings engaged in the "wave of renovations" is a tool for the sustainable development of university campuses.
{"title":"The Building Certification System - A Tool of Sustainable Development of University Campuses","authors":"Ioana-Francesca Prada Hanga-Fărcaş, C. Bungău, A. Scurt, Monica Cristea, M. Prada","doi":"10.2478/jaes-2023-0014","DOIUrl":"https://doi.org/10.2478/jaes-2023-0014","url":null,"abstract":"Abstract The study is part of humanity's current concerns of tempering climate change for sustainable development, in the context where the construction sector is responsible for a significant percentage of greenhouse gas emissions. In the present work, through a rigorous documentation, the authors synthesize several existing green and sustainable building certification systems. Extending the study from buildings to green neighbourhoods, to university campuses and even to green cities, models of their sustainable development are highlighted. The authors summarize the results of the various \"green\" ratings, initiating \"Top 10 Greenest Universities in the world\", demonstrating the interest of certification and classification. The paper presents the case study of the University of Oradea. From this perspective, participation in a rating of green campuses, as well as certification of buildings, are stimulating elements for approaching a sustainable development strategy. Thus, with the registration in the UI GreenMetric World University Rankings, the University of Oradea is set to rise in the ranking, which actually led to the improvement of the green criteria and implicitly to an orientation towards a sustainable development of the university campus. At the same time, the paper demonstrates that the energy certification of old buildings engaged in the \"wave of renovations\" is a tool for the sustainable development of university campuses.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45337159","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}
Abstract Paper concerns problems of as-built geodetic inventory of a commercial-service facility with connections (water, sanitary, rainwater drainage, electricity and telecommunications). The facility has a built-up area of more than 3,700 m2 and is located on two registered lands. The inventory was carried out using a GNSS receiver, tacheometer and leveller, and using methods: indentation, orthogonal and geometric levelling. The paper also compares the inventory of the selected building with that of a single-family house. The main differences include, first and foremost, the timing of the survey, the technique, the equipment used and the labour costs.
{"title":"Problems of as-Built Inventories of Commercial Service Facilities","authors":"Bernarda Gębka, A. Buda, K. Maciuk","doi":"10.2478/jaes-2023-0010","DOIUrl":"https://doi.org/10.2478/jaes-2023-0010","url":null,"abstract":"Abstract Paper concerns problems of as-built geodetic inventory of a commercial-service facility with connections (water, sanitary, rainwater drainage, electricity and telecommunications). The facility has a built-up area of more than 3,700 m2 and is located on two registered lands. The inventory was carried out using a GNSS receiver, tacheometer and leveller, and using methods: indentation, orthogonal and geometric levelling. The paper also compares the inventory of the selected building with that of a single-family house. The main differences include, first and foremost, the timing of the survey, the technique, the equipment used and the labour costs.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45893711","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}
Abstract Recently, the reinforced cement concrete (RCC) frame has been one of the most commonly used structural systems for buildings in the high seismic region due to its inherent earthquake-resistant property. However, there is still a deficiency in understanding the RCC building structural system dynamic behaviour during significant earthquakes. A 1/4th scaled RCC framed building structure has been tested on the shake table in the present study. The response in terms of engineering parameters like natural time period, damping, story acceleration, and damage pattern have been reported. The 1940 EL-Centro (NS component) time history has been used for the study. The failure patterns were observed within the column-beam joints. The difference between the input signal and the output signal has been noted and found to be in good agreement with each other.
{"title":"Seismic Analysis of Reinforced Concrete Frame Using Shake Table Test","authors":"M. Arastu, K. Moin","doi":"10.2478/jaes-2023-0004","DOIUrl":"https://doi.org/10.2478/jaes-2023-0004","url":null,"abstract":"Abstract Recently, the reinforced cement concrete (RCC) frame has been one of the most commonly used structural systems for buildings in the high seismic region due to its inherent earthquake-resistant property. However, there is still a deficiency in understanding the RCC building structural system dynamic behaviour during significant earthquakes. A 1/4th scaled RCC framed building structure has been tested on the shake table in the present study. The response in terms of engineering parameters like natural time period, damping, story acceleration, and damage pattern have been reported. The 1940 EL-Centro (NS component) time history has been used for the study. The failure patterns were observed within the column-beam joints. The difference between the input signal and the output signal has been noted and found to be in good agreement with each other.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45918192","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}
Abstract Annually, there is an enormous amount of glass waste created worldwide, yet only a small portion of that material is recycled. Recovering waste glass (WG) in concrete demonstrates excellent progress in lowering the amount of glass. Researchers have found that adding waste glass to concrete improves its qualities; WG can be utilized as powder, fine as well as coarse aggregate. However, the question that arises is how this powder added to concrete improves, or at least maintains, the mechanical properties of the concrete despite the reduction in the cement quantity. The aim of the present paper is to investigate the behavior of concrete with the addition of glass powder. For this purpose, a control concrete and concretes were prepared with 10%, 15% and 20% of the cement content of the glass powder, based on the same concrete formulation and by varying the W/C ratio. In the hardened state, the addition of glass powder up to 20% of the cement content, generated an increase in compressive strength at 28 days; this increase is caused by the reaction between the glass powder and the lime released during the hydration of Portland cement and creates a binder called hydrated calcium silicate (S-C-H) (pozzolanic reaction). The latter plays an important role in increasing the strength of concrete, and since the fineness of the glass powder is similar to that of cement, it has a role of filling, and accelerates the pozzolanic reaction. For an addition of 20% to 30% of pozzolan, theoretically we could react all the lime produced by the hydration of Portland cement. Therefore, beyond 25% or 30% of the glass powder, the strength is affected, which has been confirmed by many researchers. Finally, it can be concluded that the use of glass powder in concrete improves its mechanical behavior compared to ordinary condition, but with a limited percentage of 20% of the cement content.
{"title":"Experimental Characterization of the Mechanical Properties of Concrete Based on Glass-Powder","authors":"Y. Boucheneb, R. Mehaddene, H. Kemer","doi":"10.2478/jaes-2023-0005","DOIUrl":"https://doi.org/10.2478/jaes-2023-0005","url":null,"abstract":"Abstract Annually, there is an enormous amount of glass waste created worldwide, yet only a small portion of that material is recycled. Recovering waste glass (WG) in concrete demonstrates excellent progress in lowering the amount of glass. Researchers have found that adding waste glass to concrete improves its qualities; WG can be utilized as powder, fine as well as coarse aggregate. However, the question that arises is how this powder added to concrete improves, or at least maintains, the mechanical properties of the concrete despite the reduction in the cement quantity. The aim of the present paper is to investigate the behavior of concrete with the addition of glass powder. For this purpose, a control concrete and concretes were prepared with 10%, 15% and 20% of the cement content of the glass powder, based on the same concrete formulation and by varying the W/C ratio. In the hardened state, the addition of glass powder up to 20% of the cement content, generated an increase in compressive strength at 28 days; this increase is caused by the reaction between the glass powder and the lime released during the hydration of Portland cement and creates a binder called hydrated calcium silicate (S-C-H) (pozzolanic reaction). The latter plays an important role in increasing the strength of concrete, and since the fineness of the glass powder is similar to that of cement, it has a role of filling, and accelerates the pozzolanic reaction. For an addition of 20% to 30% of pozzolan, theoretically we could react all the lime produced by the hydration of Portland cement. Therefore, beyond 25% or 30% of the glass powder, the strength is affected, which has been confirmed by many researchers. Finally, it can be concluded that the use of glass powder in concrete improves its mechanical behavior compared to ordinary condition, but with a limited percentage of 20% of the cement content.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44900891","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}
M. Ahsan, M. Adil Sultan, Faisal M. Zeidan A., S. Cheema, M. Jawad, Humaira Kanwal, M. Asim, Tayyab Mughal, M. Tahir, A. Mahmood, Sadia Mughal
Abstract Mostly used material is concrete which has versatile quality for construction works. Fibrous concrete have significant factor that improve the scale and value to concrete for humid environments with significant role. Day by day abundant demand and use of concrete is increasing. It is considered as a 2nd largest building material due to the major productivity. By the use of fibrous concrete, some bonding and environmental issues have been addressed. Keeping in this view, an experimental based study is conducted to evaluate the strength of fiber reinforced concrete at different percentages 0%, 0.5%, 1.0%, 1.5% and 2.0%. All percentages are added by the weight of concrete with all fibers. In this connection, one hundred and fifty-three cylinders of five mixes are prepared. Workability checked of fresh concrete during the pouring of concrete cylinders. Poured cylinders’ samples are left for different curing ages at 7 and 28 days. One hundred and two cylinders for compression at 7 and 28days but fifty-one cylinders for split tensile test at 28days with all fibers i.e. glass fiber, steel fiber, coconut fiber and polypropylene fiber. After curing, compression and split tensile tests are performed to check the strength of hardened concrete. Workability of five mixes lies between 40-90mm.Fibrous concrete is suitable for humid environment where high strength and voids less concrete are required. Addition of fibers in concrete may improves the strength parameters as well as to increase the bonding and tensile properties of concrete. It reduces the quantity of water to be used in concrete. Also the use of different types of fibers has been proved to be economical and is considered as environmental friendly construction material.
{"title":"Influence of Fibers on Fresh and Mechanical Properties of (FRC) Fiber Reinforced Concrete, A Step Towards Sustainability","authors":"M. Ahsan, M. Adil Sultan, Faisal M. Zeidan A., S. Cheema, M. Jawad, Humaira Kanwal, M. Asim, Tayyab Mughal, M. Tahir, A. Mahmood, Sadia Mughal","doi":"10.2478/jaes-2023-0003","DOIUrl":"https://doi.org/10.2478/jaes-2023-0003","url":null,"abstract":"Abstract Mostly used material is concrete which has versatile quality for construction works. Fibrous concrete have significant factor that improve the scale and value to concrete for humid environments with significant role. Day by day abundant demand and use of concrete is increasing. It is considered as a 2nd largest building material due to the major productivity. By the use of fibrous concrete, some bonding and environmental issues have been addressed. Keeping in this view, an experimental based study is conducted to evaluate the strength of fiber reinforced concrete at different percentages 0%, 0.5%, 1.0%, 1.5% and 2.0%. All percentages are added by the weight of concrete with all fibers. In this connection, one hundred and fifty-three cylinders of five mixes are prepared. Workability checked of fresh concrete during the pouring of concrete cylinders. Poured cylinders’ samples are left for different curing ages at 7 and 28 days. One hundred and two cylinders for compression at 7 and 28days but fifty-one cylinders for split tensile test at 28days with all fibers i.e. glass fiber, steel fiber, coconut fiber and polypropylene fiber. After curing, compression and split tensile tests are performed to check the strength of hardened concrete. Workability of five mixes lies between 40-90mm.Fibrous concrete is suitable for humid environment where high strength and voids less concrete are required. Addition of fibers in concrete may improves the strength parameters as well as to increase the bonding and tensile properties of concrete. It reduces the quantity of water to be used in concrete. Also the use of different types of fibers has been proved to be economical and is considered as environmental friendly construction material.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41376926","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}
Yasmina Bouleghebar, M. Bentchikou, O. Boukendakdji, K. El-Hadj, F. Debieb, A. Maisarah
Abstract The use of glass and brick powder waste as supplementary cementious material provides an effective approach to produce concrete in order to effectively save resources and solve environmental pollution problems. This study shows the evolution of the preparation of an eco-friendly self-compacting mortar (SCM) with various fineness levels and replacement ratios of crushed glass and crushed calcined brick waste. Cement was replaced by weight, by 8, 12, 16, 20, 24% of glass powder (GP) and 4, 8, 12, 16 and 20% of crushed brick powder (BP), with three specific surface Blaine (SSB) fineness measurements (F1=3300cm2/g,F2=4400 cm2/g and F3=6000 cm2/g) for both wastes. Mini-slump and V-funnel flow time tests of fresh SCM were evaluated. Compressive and flexural strength developments of cured SCMs were determined on 7, 14, 28, 5 6, and 90 days. In addition, porosity of SCM was also evaluated. The results revealed that the (SCM-GP) mix increases workability and reduces superplasticizer dosage, while the (SCMBP) mix reduces workability with a slight increase in superplasticizer. When the GP fineness is higher than the cement fineness, the compression strength with GP contents up to 16% is superior to without the GP, whereas for the BP the strength improvement is up to 8%, while the compression strength decreases when the GP and BP fineness is close or lower than the cement fineness. The porosity diminishes with the increase of the fineness; the 12% of the GPF3 indicated the lowest porousness at 400 days, whereas for SCM-BP the 8BPF3 is the least porous mixture.
{"title":"The Effect of Brick and Glass Powder on the Mechanical Properties and Porosity of Self-Compacting Mortar","authors":"Yasmina Bouleghebar, M. Bentchikou, O. Boukendakdji, K. El-Hadj, F. Debieb, A. Maisarah","doi":"10.2478/jaes-2023-0006","DOIUrl":"https://doi.org/10.2478/jaes-2023-0006","url":null,"abstract":"Abstract The use of glass and brick powder waste as supplementary cementious material provides an effective approach to produce concrete in order to effectively save resources and solve environmental pollution problems. This study shows the evolution of the preparation of an eco-friendly self-compacting mortar (SCM) with various fineness levels and replacement ratios of crushed glass and crushed calcined brick waste. Cement was replaced by weight, by 8, 12, 16, 20, 24% of glass powder (GP) and 4, 8, 12, 16 and 20% of crushed brick powder (BP), with three specific surface Blaine (SSB) fineness measurements (F1=3300cm2/g,F2=4400 cm2/g and F3=6000 cm2/g) for both wastes. Mini-slump and V-funnel flow time tests of fresh SCM were evaluated. Compressive and flexural strength developments of cured SCMs were determined on 7, 14, 28, 5 6, and 90 days. In addition, porosity of SCM was also evaluated. The results revealed that the (SCM-GP) mix increases workability and reduces superplasticizer dosage, while the (SCMBP) mix reduces workability with a slight increase in superplasticizer. When the GP fineness is higher than the cement fineness, the compression strength with GP contents up to 16% is superior to without the GP, whereas for the BP the strength improvement is up to 8%, while the compression strength decreases when the GP and BP fineness is close or lower than the cement fineness. The porosity diminishes with the increase of the fineness; the 12% of the GPF3 indicated the lowest porousness at 400 days, whereas for SCM-BP the 8BPF3 is the least porous mixture.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46845256","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}
Abstract The stability evaluation of the dams subjected to seismic excitations is really very complex as the earthquake response of the concrete gravity dam depends upon its connection joints with foundation rock. This study presents the seismic response of concrete gravity dams considering welded contact and friction contact and along dam-foundation rock interface. Friction contact is provided using contact elements. Two-dimensional finite element model of Oued Fodda concrete gravity dam, located in Chlef at the northwestern part of Algeria, is used for this purpose. Nonlinear analyses of dam-foundation rock system are performed using ANSYS software. The reservoir water is modeled as added mass using the Westergaard approach. The Druker-Prager model is employed in the nonlinear analysis for dam concrete. The surface-to-surface contact elements based on the Coulomb's friction law are used to describe the friction. These contact elements use a target surface and a contact surface to form a contact pair. According to this study, when the friction contact is considered in joints, sliding displacement of dam base occurs along the dam-foundation rock interface. The dam sliding along its foundation decreases the deformation response; principal stresses in the dam body and shear force at both the heel and toe of the dam.
{"title":"Earthquake Behavior of Concrete Gravity Dams During Ground Motions","authors":"D. Ouzandja, M. Messaad, T. Messaad","doi":"10.2478/jaes-2023-0013","DOIUrl":"https://doi.org/10.2478/jaes-2023-0013","url":null,"abstract":"Abstract The stability evaluation of the dams subjected to seismic excitations is really very complex as the earthquake response of the concrete gravity dam depends upon its connection joints with foundation rock. This study presents the seismic response of concrete gravity dams considering welded contact and friction contact and along dam-foundation rock interface. Friction contact is provided using contact elements. Two-dimensional finite element model of Oued Fodda concrete gravity dam, located in Chlef at the northwestern part of Algeria, is used for this purpose. Nonlinear analyses of dam-foundation rock system are performed using ANSYS software. The reservoir water is modeled as added mass using the Westergaard approach. The Druker-Prager model is employed in the nonlinear analysis for dam concrete. The surface-to-surface contact elements based on the Coulomb's friction law are used to describe the friction. These contact elements use a target surface and a contact surface to form a contact pair. According to this study, when the friction contact is considered in joints, sliding displacement of dam base occurs along the dam-foundation rock interface. The dam sliding along its foundation decreases the deformation response; principal stresses in the dam body and shear force at both the heel and toe of the dam.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46474746","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}
Ioana-Francesca Prada Hanga-Fărcaş, C. Bungau, A. Scurt, A. Durgheu, A. Pescaru, M. Prada
Abstract The paper brings to attention the industrial buildings from the 1900s through two case studies of high-rise buildings for the period in which they were built. The study is done by analyzing the resistance structure of two buildings built around the 1880s and their behavior over time. The destiny of these very valuable buildings from a historical, architectural and structural point of view is regarded as a motivation for the authors for the elaboration of the present paper. One of the studied buildings has been dismantled, while for the second one, the owners are allocating funding for structural rehabilitation in order to maintain it, in parallel with the re-conversion, modernization and expansion of the building. For valuable buildings and historic monument buildings, maintenance activity is particularly important in order to prevent structural degradation. It is especially important to pass on the historical legacy to future generations, therefore its structural strengthening and rehabilitation must take precedence over financial implications.
{"title":"Oradea’s 1900s Industrial Structures Behaviour","authors":"Ioana-Francesca Prada Hanga-Fărcaş, C. Bungau, A. Scurt, A. Durgheu, A. Pescaru, M. Prada","doi":"10.2478/jaes-2023-0015","DOIUrl":"https://doi.org/10.2478/jaes-2023-0015","url":null,"abstract":"Abstract The paper brings to attention the industrial buildings from the 1900s through two case studies of high-rise buildings for the period in which they were built. The study is done by analyzing the resistance structure of two buildings built around the 1880s and their behavior over time. The destiny of these very valuable buildings from a historical, architectural and structural point of view is regarded as a motivation for the authors for the elaboration of the present paper. One of the studied buildings has been dismantled, while for the second one, the owners are allocating funding for structural rehabilitation in order to maintain it, in parallel with the re-conversion, modernization and expansion of the building. For valuable buildings and historic monument buildings, maintenance activity is particularly important in order to prevent structural degradation. It is especially important to pass on the historical legacy to future generations, therefore its structural strengthening and rehabilitation must take precedence over financial implications.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42111177","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}
Abstract A brief review of the evolution and origins of Ultra-High Performance Concrete (UHPC) is covered in this article. UHPC is a unique concrete with unique features such as workability, mechanical properties, and durability that differs from regular concrete and high-performance concrete in terms of mix composition, needs, and manufacturing methods. In terms of the material ingredients of UHPC, Silica Fume (SF) plays a critical role in the production of UHPC due to its unique physical and chemical properties. Ground Granulated Blast Furnace Slag (GGBS), a highly reactive pozzolan similar to SF, is another viable contender among mineral admixtures. As a result, this article examines the effects of SF and GGBS in the UHPC combination. This paper also reviews the durability of UHPC in terms of water and chloride-ion permeability. A brief review of the importance of steel and polypropylene fibre (PPF) in UHPC blends, as well as their pull-out behaviour, is also reviewed.
{"title":"Permeation and Fiber Matrix Bond Behaviour of Ultra High Performance Concrete – A Review","authors":"S. Prakash, S. Kumar, B. Rai","doi":"10.2478/jaes-2022-0028","DOIUrl":"https://doi.org/10.2478/jaes-2022-0028","url":null,"abstract":"Abstract A brief review of the evolution and origins of Ultra-High Performance Concrete (UHPC) is covered in this article. UHPC is a unique concrete with unique features such as workability, mechanical properties, and durability that differs from regular concrete and high-performance concrete in terms of mix composition, needs, and manufacturing methods. In terms of the material ingredients of UHPC, Silica Fume (SF) plays a critical role in the production of UHPC due to its unique physical and chemical properties. Ground Granulated Blast Furnace Slag (GGBS), a highly reactive pozzolan similar to SF, is another viable contender among mineral admixtures. As a result, this article examines the effects of SF and GGBS in the UHPC combination. This paper also reviews the durability of UHPC in terms of water and chloride-ion permeability. A brief review of the importance of steel and polypropylene fibre (PPF) in UHPC blends, as well as their pull-out behaviour, is also reviewed.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49292469","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}
M. Khouadjia, K. Abdou, A. Belkadi, O. Kessal, B. Mezghiche
Abstract The production of crushed sand is accompanied by the production of fine particles. The proportion of these fine particles varies from one sand to another. The current publications of standards for reference in the construction industry have been adapted by increasing the limit of fine particles in crushed sand, but this is insufficient because sands with high rate of fine particles are not used in the industry. The principal objective of this study is to investigate the influence of crushed sands with different mineralogical natures (limestone and siliceous) and with varying proportions of fine particles on the evolution of the modulus of deformability and of longitudinal and transverse Elasto-instantaneous deformations. The experimental results showed that the longitudinal and transverse Elasto-instantaneous deformations and the modulus of deformability varied according to the nature of the sands (river sand, quarry sand, dune sand) and according to the fine content of the sands. Logarithmic regressions showed an accurate fit for the correlation coefficient R2. The test results demonstrated that deformations are influenced by sand type and indicated an optimal of 10% of fine particles. Empirical equations can predict the modulus of deformability from prismatic concretes.
{"title":"Effect of Sands on the Evolution of the Modulus of Deformability and Longitudinal and Transverse Elasto-Instantaneous Deformations as a Function of the Relative Constraint in Concrete","authors":"M. Khouadjia, K. Abdou, A. Belkadi, O. Kessal, B. Mezghiche","doi":"10.2478/jaes-2022-0025","DOIUrl":"https://doi.org/10.2478/jaes-2022-0025","url":null,"abstract":"Abstract The production of crushed sand is accompanied by the production of fine particles. The proportion of these fine particles varies from one sand to another. The current publications of standards for reference in the construction industry have been adapted by increasing the limit of fine particles in crushed sand, but this is insufficient because sands with high rate of fine particles are not used in the industry. The principal objective of this study is to investigate the influence of crushed sands with different mineralogical natures (limestone and siliceous) and with varying proportions of fine particles on the evolution of the modulus of deformability and of longitudinal and transverse Elasto-instantaneous deformations. The experimental results showed that the longitudinal and transverse Elasto-instantaneous deformations and the modulus of deformability varied according to the nature of the sands (river sand, quarry sand, dune sand) and according to the fine content of the sands. Logarithmic regressions showed an accurate fit for the correlation coefficient R2. The test results demonstrated that deformations are influenced by sand type and indicated an optimal of 10% of fine particles. Empirical equations can predict the modulus of deformability from prismatic concretes.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48484244","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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