International journal of architecture, engineering and construction, Mar 1, 2018
This paper presents the results of a follow-up study of the construction of the fishing harbor of... more This paper presents the results of a follow-up study of the construction of the fishing harbor of Sidi Mansour located 11 km north of Sfax. The manufacturing of a 361.5-meter-long dock was made from three types of reinforced concrete blocks. The Dreux-Gorisse method was used to determine the cement and aggregates content for the concrete mix. A compression test machine was used to determine the values of compressive strength of cylindrical concrete specimens (16 cm × 32 cm) at the ages of 4, 7 and 28 days. The consistency as well as workability of fresh concrete were identified using a slump test.
In recent years, the durability of concrete has been the subject of a few research projects carri... more In recent years, the durability of concrete has been the subject of a few research projects carried out by several scientific and technical centres. As a major cause of concrete degradation around the world, reinforcing steel corrosion requires our full attention. This article analyses one of the phenomena at the origin of these disorders, namely the carbonation of concrete, and proposes some provisions to guard against it. The article is divided into two parts; the first describes the causes and consequences of the chemical process of carbonation as well as the means to protect it. The second deals with the influence factors on carbonation such as the minimum cement dosage, the type of cement, the water-cement ratio (W/C) and the reinforcement coating. Indeed, prismatic specimens (15 x 15 x 60 cm3) and cubic specimens (15 x 15 x 15 cm3) were made for different mixtures and with a W/C ratio of 0.50, 0.55 and 0.60. The prismatic specimens were subjected to a carbonation test, while t...
A fishing harbour is a port located by the sea, water body or river and reserved for boats or fis... more A fishing harbour is a port located by the sea, water body or river and reserved for boats or fishing vessels. Thanks to its infrastructures, it allows and facilitates the landing of their load. The fishing harbour is responsible for managing all activities related to fishing and fish marketing. The different phases concern the reception of fishing vessels, fish, its treatment, its packaging in the most varied forms, its marketing and, finally, its shipment to places of consumption. Depending on whether one or the other of the functions is predominant, the port is located near the fishing grounds or near the places of consumption. In the latter case, particular attention must be paid to the network of land and commercial links. The current tendency is to favor the first landing of the fish in fishing ports near the fishing grounds, then to redirect, possibly in containers, the fish towards ports near the places of consumption which become above all platforms of transformation and marketing. Fishing harbors are the most numerous in the world, and are frequently those with the smallest dimensions. Their dimensions fluctuate according to the boats they welcome: the high-sea trawlers leaving for several weeks will need, moreover, of dock space when they come back to unload their cargo, while the small fishing boats leaving by day will need to be able to unload quickly for the auction. The infrastructure is simpler than for a commercial port: some wharves or pontoons, a refueling station, and a way to sell the fishery product (nearby market), and possibly treat it before sale if it was not done on the boat. Many fishing harbors are also the source of major impacts on the physical and biological coastal environment.1 The geographical position and geometry of harbor basins and jetties determine the qualities of a port and influence the following parameters:
Abstract The formulation of self-compacting concrete (SCC) requires a large volume of additions t... more Abstract The formulation of self-compacting concrete (SCC) requires a large volume of additions to increase the volume of the paste and reduce the amount of cement. This paper presents the results of an experimental and theoretical study of the effect of particle size of limestone filler on the rheology of SCC in its fresh state. The first part is devoted to the experimental study of the influence of particle size of the limestone filler on the rheology of SCC in the fresh state. In the second part, a simple theoretical model was developed to determine the dosage of filler considering its particle size. Finally, the theoretical model was validated by experimental tests on differents SCC mixed with different quantities of filler predicted by the model. The results showed that all concretes have a similiar rheology and compressive strength.
Journal of Smart Buildings and Construction Technology
Tunisia is one of the pioneering developing countries in terms of energyefficiency policy initiat... more Tunisia is one of the pioneering developing countries in terms of energyefficiency policy initiated since the mid-1980s. Indeed, energy efficiencyhas become one of the main pillars of the country’s energy strategy,especially with the increase in energy prices. The main objective of thiswork is to give an idea of the impact that certain choices made during thedesign of a building can have on its energy balance, namely the orientationof the facades, the types of glazing and their surfaces, the choice ofmaterials, etc. The calculation of the building’s energy requirement wasdetermined using the transient systems simulation program TRNSYS(version 18) with a modular structure.
The International Journal of Thermal and Environmental Engineering
Several researches have been conducted to find a practical and environmentally sound solution of ... more Several researches have been conducted to find a practical and environmentally sound solution of the problem of scrap tires. In this context, an experimental study was conducted to provide more data on the effect of crumb rubber on the acoustic properties of self-consolidating concrete SCC. To this end, Parallelepiped and cylindrical specimens were prepared by varying the proportion of crumb rubber with percentages of 0 %, 10 %, 20 % and 30 % of the volume of gravel. Properties such standardized level difference, sound absorption at different frequency and noise reduction were investigated. The results showed that the sound absorption and noise reduction coefficient were increased according to the increase of the percentage of crumb rubber. The self-consolidating concrete rubber SCCR has better acoustic properties in comparison with SCC.
The quality of the communication between teachers and students and ultimately, of classroom educa... more The quality of the communication between teachers and students and ultimately, of classroom education itself, is closely linked to the acoustic quality of the auditorium. This acoustic quality can be characterized based on the reverberation time (RT), speech transmission index (STI) and the sound insulation. In this context, an acoustic study was conducted in an auditorium located in the Higher Institute of Technological Studies (ISET) of Sfax, south of Tunisia. The investigation used acoustic measurement methods to assess the acoustic quality of the nave and the results were compared with the standards ISO 3382-1 and ISO 3382-2.The results of this work were obtained by measuring the RT values and the sound insulation of auditorium façades. In addition to these parameters obtained by measurements, STI was obtained through the computer simulation (utilizing ODEON ver. 4.2, assuming the occupied case). The results showed that the measured and calculated values were consistent with tho...
To combat overconsumption of energy in buildings for residential or industrial use, it’s necessar... more To combat overconsumption of energy in buildings for residential or industrial use, it’s necessary to use materials that provide good thermal insulation. In this context, an experimental study was carried out to assess the mechanical and thermophysical properties of a mixture of plaster and fibers of Posidonia oceanica. For this purpose, three series of parallelepipedic specimens of dimensions 270 mm x 270 mm x 40 mm and three series of prismatic specimens of dimensions 40 mm x 40 mm x 160 mm were prepared by varying the percentage of fibers from 0% to 20%. Mechanical and physical properties, such as: compressive strength, flexual strength, thermal conductivity and thermal diffusivity, were investigated. Density of different test samples was determined for percentages of fibers ranging from 0% to 20%. The results have shown that fiber-reinforced mixtures have a better resistance to compression and bending. The addition of Posidonia oceanica fibers considerably reduces thermal conduc...
Currently, marble waste is valued by incorporating powders, obtained by drying and grinding sludg... more Currently, marble waste is valued by incorporating powders, obtained by drying and grinding sludge resulting from marble blocks cutting operation, or the aggregates, obtained by crushing the solid waste, on self-compacting concrete. These two procedures require a lot of energy. This experimental and theoretical work focuses on the direct incorporation of marble sludge in self-compacting concrete. The first part needs the study of the rheological behavior of the marble sludge grout (MSG) as a function of the added water amount. For this, different grouts were prepared and tested by varying the water/sludge ratio. In the second part, four self-compacting concretes (SCCs) were mixed with MSG having different water/sludge ratios in order to validate a new technique of gassing self-compacting concrete with MSG. The test results show that the marble grains of grout is totally dispersed when the water/sludge ratio was equal to 1.2. The results also show that the gassing with MSG allows us ...
Reinforced concrete can deteriorate under the influence of causes related to its original quality... more Reinforced concrete can deteriorate under the influence of causes related to its original quality or to exploitation or environmental stresses. Apparent or hidden pathologies can occur. In order to know their nature, their extent and their evolution potential, a necessary diagnosis is made for taking decisions concerning the maintenance of the structure concerned. There are many methods or techniques of expertise that can help diagnose the main causes of deterioration, including non–destructive testing (NDT) that do not damage the buildings and allow contractors and building owners have an inventory of structures and pathologies. NDT such as the Schmidt Rebound Hammer have been widely applied to the study of mechanical properties and integrity of concrete structures.1– 6 The results of these investigations are most often presented in the form of graphic plates: sections, maps of anomalies and interpreted measurement profiles. In this context, a great deal of research has been done to prove that the physical properties of concrete can be related to the compressive strength.7–9 In our study these auscultation techniques were adopted according to the type of disorders affecting the structure. Indeed, the profometer has been useful for the localization of reinforcements in concrete and the estimation of the thickness of coating. The evaluation of the quality and strength of the concrete was determined using a Schmidt Rebound Hammer; it is the most widely used instrument in the field of non–destructive testing of the compressive strength of concrete. This measurement technique is always approximate and is limited to depths of about 8 cm for surface measurements. The measurement of the carbonation depth was determined by the phenolphthalein method. The origin of the chemical disorders was determined by analyzes on two soil samples from the bottom of the excavations in order to assess their swelling abilities and their sulfate ion content.
International journal of architecture, engineering and construction, Mar 1, 2018
This paper presents the results of a follow-up study of the construction of the fishing harbor of... more This paper presents the results of a follow-up study of the construction of the fishing harbor of Sidi Mansour located 11 km north of Sfax. The manufacturing of a 361.5-meter-long dock was made from three types of reinforced concrete blocks. The Dreux-Gorisse method was used to determine the cement and aggregates content for the concrete mix. A compression test machine was used to determine the values of compressive strength of cylindrical concrete specimens (16 cm × 32 cm) at the ages of 4, 7 and 28 days. The consistency as well as workability of fresh concrete were identified using a slump test.
In recent years, the durability of concrete has been the subject of a few research projects carri... more In recent years, the durability of concrete has been the subject of a few research projects carried out by several scientific and technical centres. As a major cause of concrete degradation around the world, reinforcing steel corrosion requires our full attention. This article analyses one of the phenomena at the origin of these disorders, namely the carbonation of concrete, and proposes some provisions to guard against it. The article is divided into two parts; the first describes the causes and consequences of the chemical process of carbonation as well as the means to protect it. The second deals with the influence factors on carbonation such as the minimum cement dosage, the type of cement, the water-cement ratio (W/C) and the reinforcement coating. Indeed, prismatic specimens (15 x 15 x 60 cm3) and cubic specimens (15 x 15 x 15 cm3) were made for different mixtures and with a W/C ratio of 0.50, 0.55 and 0.60. The prismatic specimens were subjected to a carbonation test, while t...
A fishing harbour is a port located by the sea, water body or river and reserved for boats or fis... more A fishing harbour is a port located by the sea, water body or river and reserved for boats or fishing vessels. Thanks to its infrastructures, it allows and facilitates the landing of their load. The fishing harbour is responsible for managing all activities related to fishing and fish marketing. The different phases concern the reception of fishing vessels, fish, its treatment, its packaging in the most varied forms, its marketing and, finally, its shipment to places of consumption. Depending on whether one or the other of the functions is predominant, the port is located near the fishing grounds or near the places of consumption. In the latter case, particular attention must be paid to the network of land and commercial links. The current tendency is to favor the first landing of the fish in fishing ports near the fishing grounds, then to redirect, possibly in containers, the fish towards ports near the places of consumption which become above all platforms of transformation and marketing. Fishing harbors are the most numerous in the world, and are frequently those with the smallest dimensions. Their dimensions fluctuate according to the boats they welcome: the high-sea trawlers leaving for several weeks will need, moreover, of dock space when they come back to unload their cargo, while the small fishing boats leaving by day will need to be able to unload quickly for the auction. The infrastructure is simpler than for a commercial port: some wharves or pontoons, a refueling station, and a way to sell the fishery product (nearby market), and possibly treat it before sale if it was not done on the boat. Many fishing harbors are also the source of major impacts on the physical and biological coastal environment.1 The geographical position and geometry of harbor basins and jetties determine the qualities of a port and influence the following parameters:
Abstract The formulation of self-compacting concrete (SCC) requires a large volume of additions t... more Abstract The formulation of self-compacting concrete (SCC) requires a large volume of additions to increase the volume of the paste and reduce the amount of cement. This paper presents the results of an experimental and theoretical study of the effect of particle size of limestone filler on the rheology of SCC in its fresh state. The first part is devoted to the experimental study of the influence of particle size of the limestone filler on the rheology of SCC in the fresh state. In the second part, a simple theoretical model was developed to determine the dosage of filler considering its particle size. Finally, the theoretical model was validated by experimental tests on differents SCC mixed with different quantities of filler predicted by the model. The results showed that all concretes have a similiar rheology and compressive strength.
Journal of Smart Buildings and Construction Technology
Tunisia is one of the pioneering developing countries in terms of energyefficiency policy initiat... more Tunisia is one of the pioneering developing countries in terms of energyefficiency policy initiated since the mid-1980s. Indeed, energy efficiencyhas become one of the main pillars of the country’s energy strategy,especially with the increase in energy prices. The main objective of thiswork is to give an idea of the impact that certain choices made during thedesign of a building can have on its energy balance, namely the orientationof the facades, the types of glazing and their surfaces, the choice ofmaterials, etc. The calculation of the building’s energy requirement wasdetermined using the transient systems simulation program TRNSYS(version 18) with a modular structure.
The International Journal of Thermal and Environmental Engineering
Several researches have been conducted to find a practical and environmentally sound solution of ... more Several researches have been conducted to find a practical and environmentally sound solution of the problem of scrap tires. In this context, an experimental study was conducted to provide more data on the effect of crumb rubber on the acoustic properties of self-consolidating concrete SCC. To this end, Parallelepiped and cylindrical specimens were prepared by varying the proportion of crumb rubber with percentages of 0 %, 10 %, 20 % and 30 % of the volume of gravel. Properties such standardized level difference, sound absorption at different frequency and noise reduction were investigated. The results showed that the sound absorption and noise reduction coefficient were increased according to the increase of the percentage of crumb rubber. The self-consolidating concrete rubber SCCR has better acoustic properties in comparison with SCC.
The quality of the communication between teachers and students and ultimately, of classroom educa... more The quality of the communication between teachers and students and ultimately, of classroom education itself, is closely linked to the acoustic quality of the auditorium. This acoustic quality can be characterized based on the reverberation time (RT), speech transmission index (STI) and the sound insulation. In this context, an acoustic study was conducted in an auditorium located in the Higher Institute of Technological Studies (ISET) of Sfax, south of Tunisia. The investigation used acoustic measurement methods to assess the acoustic quality of the nave and the results were compared with the standards ISO 3382-1 and ISO 3382-2.The results of this work were obtained by measuring the RT values and the sound insulation of auditorium façades. In addition to these parameters obtained by measurements, STI was obtained through the computer simulation (utilizing ODEON ver. 4.2, assuming the occupied case). The results showed that the measured and calculated values were consistent with tho...
To combat overconsumption of energy in buildings for residential or industrial use, it’s necessar... more To combat overconsumption of energy in buildings for residential or industrial use, it’s necessary to use materials that provide good thermal insulation. In this context, an experimental study was carried out to assess the mechanical and thermophysical properties of a mixture of plaster and fibers of Posidonia oceanica. For this purpose, three series of parallelepipedic specimens of dimensions 270 mm x 270 mm x 40 mm and three series of prismatic specimens of dimensions 40 mm x 40 mm x 160 mm were prepared by varying the percentage of fibers from 0% to 20%. Mechanical and physical properties, such as: compressive strength, flexual strength, thermal conductivity and thermal diffusivity, were investigated. Density of different test samples was determined for percentages of fibers ranging from 0% to 20%. The results have shown that fiber-reinforced mixtures have a better resistance to compression and bending. The addition of Posidonia oceanica fibers considerably reduces thermal conduc...
Currently, marble waste is valued by incorporating powders, obtained by drying and grinding sludg... more Currently, marble waste is valued by incorporating powders, obtained by drying and grinding sludge resulting from marble blocks cutting operation, or the aggregates, obtained by crushing the solid waste, on self-compacting concrete. These two procedures require a lot of energy. This experimental and theoretical work focuses on the direct incorporation of marble sludge in self-compacting concrete. The first part needs the study of the rheological behavior of the marble sludge grout (MSG) as a function of the added water amount. For this, different grouts were prepared and tested by varying the water/sludge ratio. In the second part, four self-compacting concretes (SCCs) were mixed with MSG having different water/sludge ratios in order to validate a new technique of gassing self-compacting concrete with MSG. The test results show that the marble grains of grout is totally dispersed when the water/sludge ratio was equal to 1.2. The results also show that the gassing with MSG allows us ...
Reinforced concrete can deteriorate under the influence of causes related to its original quality... more Reinforced concrete can deteriorate under the influence of causes related to its original quality or to exploitation or environmental stresses. Apparent or hidden pathologies can occur. In order to know their nature, their extent and their evolution potential, a necessary diagnosis is made for taking decisions concerning the maintenance of the structure concerned. There are many methods or techniques of expertise that can help diagnose the main causes of deterioration, including non–destructive testing (NDT) that do not damage the buildings and allow contractors and building owners have an inventory of structures and pathologies. NDT such as the Schmidt Rebound Hammer have been widely applied to the study of mechanical properties and integrity of concrete structures.1– 6 The results of these investigations are most often presented in the form of graphic plates: sections, maps of anomalies and interpreted measurement profiles. In this context, a great deal of research has been done to prove that the physical properties of concrete can be related to the compressive strength.7–9 In our study these auscultation techniques were adopted according to the type of disorders affecting the structure. Indeed, the profometer has been useful for the localization of reinforcements in concrete and the estimation of the thickness of coating. The evaluation of the quality and strength of the concrete was determined using a Schmidt Rebound Hammer; it is the most widely used instrument in the field of non–destructive testing of the compressive strength of concrete. This measurement technique is always approximate and is limited to depths of about 8 cm for surface measurements. The measurement of the carbonation depth was determined by the phenolphthalein method. The origin of the chemical disorders was determined by analyzes on two soil samples from the bottom of the excavations in order to assess their swelling abilities and their sulfate ion content.
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