This paper was about an experimental work on properties and durability of partially replaced ceme... more This paper was about an experimental work on properties and durability of partially replaced cement-based composite mortars. Substitutions equal to 0, 2, 4 and 6% of finely ground polyethylene (PE) in association with a 3% nanosilica superplasticiser (SP) were used to cast the composite mortars. Fresh properties concerned setting as well as compressive strength versus porosity accessible to water whereas hardened durability properties were investigated by carbonation according to FT-IR, chloride corrosion of reinforcement, total chloride ion content, steel bars losses of mass and nitric acid attack. The superplasticiser and polyethylene powder inhibited the hydration of the cement while the compressive strength decreased with the rise of the polyethylene content but remained higher than the control mortar one for a (PE) content not exceeding 4%. Composite mortars were less porous and experienced a 2.08% average porosity. Under carbonation, composite mortars exhibited similar performance with the control mortar while corrosion and steel bar mass losses readings revealed the passive condition of the composite mortars and a total chloride content less than 0.4%. Composite mortars demonstrated better resistance to nitric acid attack with (PE) content increase. Correlation of the SEM images and Xray evidence with the experimental records may be an indication of the feasibility of providing composite mortars with an optimal 2% (PE) for concrete constructions under severe environmental conditions.
is based on the study of pozzolanic activity of the perlite powder (PP) of Hammam Boughrara by th... more is based on the study of pozzolanic activity of the perlite powder (PP) of Hammam Boughrara by the consumption of lime and the hydration of paste made with 75% of PP and 25% of lime. The fresh properties of the cement pastes were defined by normal consistencies, initial and final setting time and autoclave expansions. The manufactures of mortars for flexural and compressive strength, absorption, porosity and carbonation tests were evaluated. Four combinations with a rate of 0%, 10%, 20% and 30% substitution of cement with PP are used in order to compare them with cement without addition. The results showed that the reaction between the lime, silica and alumina of PP gives rise to several hydrates such as calcium silicate hydrate, hydrated calcium aluminates and hydrated gelhenite. This confirms the pozzolanicity of this PP. A substitution rate of PP between 10% and 20%, will increase the mechanical performance over time, densify the transfer matrices of mortars and ensure good resistance to carbonation.
h i g h l i g h t s Suitability of pre-packed and laboratory elaborated PE-based mortars was eval... more h i g h l i g h t s Suitability of pre-packed and laboratory elaborated PE-based mortars was evaluated. Comprehensive analyses and laboratory durability tests of cured mortars were assessed. Conventional ready-mixed and PE-based mortars exhibited similarities in performance. 10% PE-mortars were less susceptible to acids attacks and to corrosion under chlorides. Mortars with 10% (PE) and sand grains size less than 1 mm would improve performance.
h i g h l i g h t s Investigations on durability of recycled PE-reinforced mortars using a superp... more h i g h l i g h t s Investigations on durability of recycled PE-reinforced mortars using a superplasticiser. Mortar with 2% PE volumetric polymer particles induced significant improvements. Recycled PE-reinforced mortars appear particularly promising for repair works.
h i g h l i g h t s Suitability of pre-packed and laboratory elaborated PE-based mortars was eval... more h i g h l i g h t s Suitability of pre-packed and laboratory elaborated PE-based mortars was evaluated. Comprehensive analyses and laboratory durability tests of cured mortars were assessed. Conventional ready-mixed and PE-based mortars exhibited similarities in performance. 10% PE-mortars were less susceptible to acids attacks and to corrosion under chlorides. Mortars with 10% (PE) and sand grains size less than 1 mm would improve performance.
Abstract This paper describes an experimental work on laboratory elaborated polymer-based mortars... more Abstract This paper describes an experimental work on laboratory elaborated polymer-based mortars. A commercial ready-mixed mortar as well as laboratory elaborated normal mortar and polymer-based mortars, replacing sand with 5, 10 and 15% mass fraction of very fine polyethylene (PE) polymer particles were characterised. Acid solutions, accelerated carbonation and corrosion effects on all the mortars with a constant water-to-cement ratio were investigated. Experimental results exhibited similarities in performance between the ready-mixed fibre-based and laboratory elaborated composite mortars. In particular, polymer-based mortars with 10% (PE) demonstrated much less susceptibility to acid attack and to corrosion when exposed to chlorides. A 10% plastic waste (PE) with grain sizes of (PE) and sand not exceeding 1 mm would reduce the porosity rate and enhance the resistance to carbonation and chlorides of the polymer-based mortar as well as improve corrosion reduction effects of the reinforcements.
Journal of Materials and Engineering Structures « JMES », Jul 7, 2021
L'article traite de la modélisation linéaire des propriétés mécaniques de bétons contenant des dé... more L'article traite de la modélisation linéaire des propriétés mécaniques de bétons contenant des déchets en polyéthylène haute densité. La méthode des régressions linéaires a été utilisée pour l'analyse de ces caractéristiques. La validité de la méthode a été vérifiée en traitant deux cent dix sept valeurs d'essais référenciés. A l'issu de l'analyse, il a été démontré que le modèle linéaire proposé est parfaitement pertinent. En outre, Il a été montré, que ces conclusions peuvent s'appliquer à des bétons contenant d'autres types de déchets plastiques.
h i g h l i g h t s Investigations on durability of recycled PE-reinforced mortars using a superp... more h i g h l i g h t s Investigations on durability of recycled PE-reinforced mortars using a superplasticiser. Mortar with 2% PE volumetric polymer particles induced significant improvements. Recycled PE-reinforced mortars appear particularly promising for repair works.
Abstract This paper presents the results of an experimental program devoted to the study of Polym... more Abstract This paper presents the results of an experimental program devoted to the study of Polymer Modified Mortars’ (PMM) thermal conductivity, thermal diffusivity and calorific capacity at different temperatures and compressive and flexural strengths at room-temperature. For this purpose, Ordinary Mortar (OM) and PMM samples with different contents and through partial substitution of Portland cement were prepared. A real improvement of the PMM thermal properties was observed in comparison with those of OM despite the decrease of mechanical strength. X-rays Diffract Meter (XDM), Differential Scanning Calorimetry (DSC) and Scanning Electron Microscope (SEM) were also conducted to show the interaction of the polymer material considered.
This paper was about an experimental work on properties and durability of partially replaced ceme... more This paper was about an experimental work on properties and durability of partially replaced cement-based composite mortars. Substitutions equal to 0, 2, 4 and 6% of finely ground polyethylene (PE) in association with a 3% nanosilica superplasticiser (SP) were used to cast the composite mortars. Fresh properties concerned setting as well as compressive strength versus porosity accessible to water whereas hardened durability properties were investigated by carbonation according to FT-IR, chloride corrosion of reinforcement, total chloride ion content, steel bars losses of mass and nitric acid attack. The superplasticiser and polyethylene powder inhibited the hydration of the cement while the compressive strength decreased with the rise of the polyethylene content but remained higher than the control mortar one for a (PE) content not exceeding 4%. Composite mortars were less porous and experienced a 2.08% average porosity. Under carbonation, composite mortars exhibited similar performance with the control mortar while corrosion and steel bar mass losses readings revealed the passive condition of the composite mortars and a total chloride content less than 0.4%. Composite mortars demonstrated better resistance to nitric acid attack with (PE) content increase. Correlation of the SEM images and Xray evidence with the experimental records may be an indication of the feasibility of providing composite mortars with an optimal 2% (PE) for concrete constructions under severe environmental conditions.
is based on the study of pozzolanic activity of the perlite powder (PP) of Hammam Boughrara by th... more is based on the study of pozzolanic activity of the perlite powder (PP) of Hammam Boughrara by the consumption of lime and the hydration of paste made with 75% of PP and 25% of lime. The fresh properties of the cement pastes were defined by normal consistencies, initial and final setting time and autoclave expansions. The manufactures of mortars for flexural and compressive strength, absorption, porosity and carbonation tests were evaluated. Four combinations with a rate of 0%, 10%, 20% and 30% substitution of cement with PP are used in order to compare them with cement without addition. The results showed that the reaction between the lime, silica and alumina of PP gives rise to several hydrates such as calcium silicate hydrate, hydrated calcium aluminates and hydrated gelhenite. This confirms the pozzolanicity of this PP. A substitution rate of PP between 10% and 20%, will increase the mechanical performance over time, densify the transfer matrices of mortars and ensure good resistance to carbonation.
h i g h l i g h t s Suitability of pre-packed and laboratory elaborated PE-based mortars was eval... more h i g h l i g h t s Suitability of pre-packed and laboratory elaborated PE-based mortars was evaluated. Comprehensive analyses and laboratory durability tests of cured mortars were assessed. Conventional ready-mixed and PE-based mortars exhibited similarities in performance. 10% PE-mortars were less susceptible to acids attacks and to corrosion under chlorides. Mortars with 10% (PE) and sand grains size less than 1 mm would improve performance.
h i g h l i g h t s Investigations on durability of recycled PE-reinforced mortars using a superp... more h i g h l i g h t s Investigations on durability of recycled PE-reinforced mortars using a superplasticiser. Mortar with 2% PE volumetric polymer particles induced significant improvements. Recycled PE-reinforced mortars appear particularly promising for repair works.
h i g h l i g h t s Suitability of pre-packed and laboratory elaborated PE-based mortars was eval... more h i g h l i g h t s Suitability of pre-packed and laboratory elaborated PE-based mortars was evaluated. Comprehensive analyses and laboratory durability tests of cured mortars were assessed. Conventional ready-mixed and PE-based mortars exhibited similarities in performance. 10% PE-mortars were less susceptible to acids attacks and to corrosion under chlorides. Mortars with 10% (PE) and sand grains size less than 1 mm would improve performance.
Abstract This paper describes an experimental work on laboratory elaborated polymer-based mortars... more Abstract This paper describes an experimental work on laboratory elaborated polymer-based mortars. A commercial ready-mixed mortar as well as laboratory elaborated normal mortar and polymer-based mortars, replacing sand with 5, 10 and 15% mass fraction of very fine polyethylene (PE) polymer particles were characterised. Acid solutions, accelerated carbonation and corrosion effects on all the mortars with a constant water-to-cement ratio were investigated. Experimental results exhibited similarities in performance between the ready-mixed fibre-based and laboratory elaborated composite mortars. In particular, polymer-based mortars with 10% (PE) demonstrated much less susceptibility to acid attack and to corrosion when exposed to chlorides. A 10% plastic waste (PE) with grain sizes of (PE) and sand not exceeding 1 mm would reduce the porosity rate and enhance the resistance to carbonation and chlorides of the polymer-based mortar as well as improve corrosion reduction effects of the reinforcements.
Journal of Materials and Engineering Structures « JMES », Jul 7, 2021
L'article traite de la modélisation linéaire des propriétés mécaniques de bétons contenant des dé... more L'article traite de la modélisation linéaire des propriétés mécaniques de bétons contenant des déchets en polyéthylène haute densité. La méthode des régressions linéaires a été utilisée pour l'analyse de ces caractéristiques. La validité de la méthode a été vérifiée en traitant deux cent dix sept valeurs d'essais référenciés. A l'issu de l'analyse, il a été démontré que le modèle linéaire proposé est parfaitement pertinent. En outre, Il a été montré, que ces conclusions peuvent s'appliquer à des bétons contenant d'autres types de déchets plastiques.
h i g h l i g h t s Investigations on durability of recycled PE-reinforced mortars using a superp... more h i g h l i g h t s Investigations on durability of recycled PE-reinforced mortars using a superplasticiser. Mortar with 2% PE volumetric polymer particles induced significant improvements. Recycled PE-reinforced mortars appear particularly promising for repair works.
Abstract This paper presents the results of an experimental program devoted to the study of Polym... more Abstract This paper presents the results of an experimental program devoted to the study of Polymer Modified Mortars’ (PMM) thermal conductivity, thermal diffusivity and calorific capacity at different temperatures and compressive and flexural strengths at room-temperature. For this purpose, Ordinary Mortar (OM) and PMM samples with different contents and through partial substitution of Portland cement were prepared. A real improvement of the PMM thermal properties was observed in comparison with those of OM despite the decrease of mechanical strength. X-rays Diffract Meter (XDM), Differential Scanning Calorimetry (DSC) and Scanning Electron Microscope (SEM) were also conducted to show the interaction of the polymer material considered.
Uploads
Papers by Amel Aattache