The concrete mixed to sugarcane bagasse fibers and polypropylene fibers prepared with varied conditions were presented. The aim of our study is to formulate a concrete mixed with sugarcane bagasse fibers, which will g...The concrete mixed to sugarcane bagasse fibers and polypropylene fibers prepared with varied conditions were presented. The aim of our study is to formulate a concrete mixed with sugarcane bagasse fibers, which will gradually replace the conventional polypropylene fibers often used. We formulated all our concretes using the dreux gorisse method. We used an oven calibrated at 105˚C to dry the washed fibers. We also carried out tensile splitting and compression tests, at 28 and 112 days of age. The reinforcement mechanisms of sugarcane bagasse fibers and polypropylene fibers concretes were subjected to tensile splitting and compression tests after total immersion of the specimens in tap water at 28 and 112 days. Porosity at 28 days, mass loss and drying shrinkage at 80 days were also studied. The curing processes of concretes containing 0.10, 0.15, 0.17, 0.23 and 0.25% bagasse fibers were compared with those of ordinary concretes containing no fiber. The results showed that the addition of bagasse fibers reduces mechanical strength and porosity. In summary, specimens SBC-0.15 and SBC-0.17 showed the best results for all fibers. We plan to do the same work, but this time with raffia or palm nut fibers.展开更多
Sugar cane molasses has proved cohesive and excellent performance on soil aggregates (fine particles). However, the microstructure of consolidated soil by the molasses is not yet subjected to research. The analysis re...Sugar cane molasses has proved cohesive and excellent performance on soil aggregates (fine particles). However, the microstructure of consolidated soil by the molasses is not yet subjected to research. The analysis results of sample without molasses (0%) and consolidated samples at 8%, 12%, and 16% show that the molasses acts on the structure of clayey fine soil developing its microstructure of airy matrix type (sample without molasses (0%) to a microstructure of a qualified type, more solid. Consolidated samples to 8%, 12%, 16% of molasses). We also observe the presence of inter-aggregate pores (mesopores) of similar size in all samples. The results of porosimetrical analyses (BJH) of the sample without molasses and consolidated samples to 8%, 12%, and 16% show that simultaneous porous volumes of samples are reduced with the increasing of molasses quantity. This latter, therefore, acts on the porous volume (micropore 2 nm and mesopore 9 nm) by reducing them which really means, molasses occupies the porous volume of the sample. However, this sample seems not to have any effect on the size of mesopores 9 nm. Thus, this product induces the evolution of the soil structure towards the highly dense and condensed structure. Consequently, materials in consolidated soil by molasses will have mechanical properties far superior to those of materials consolidated soil without molasses.展开更多
Sugar cane molasses is often poured out on roads with soil in the city of Nkayi,Republic of Congo in order to reduce the dust.Nitrogen physical adsorption has allowed us to collect information on the state of the acce...Sugar cane molasses is often poured out on roads with soil in the city of Nkayi,Republic of Congo in order to reduce the dust.Nitrogen physical adsorption has allowed us to collect information on the state of the accessible total area according to the quantity of sugar cane molasses.The adsorption isotherms,the specific area,the adsorbed quantity of nitrogen on a Qm mono layer,the number of molecules constituting the adsorbed sugar cane molasses(n′)have been examined.The obtained results show that the quantity of sugar cane molasses in the material does not modify the adsorption isotherm of nitrogen of type IV that remains and a hysteria loop of type H4 in all samples,this justifies the monocoat-multicoat adsorption mechanism with capillary condensation and mesopores presence in the structure of materials.Materials with elaborated raw soil by clayey fine soil used are mesoporous materials.More of 50×1018 molecules constituting sugar cane molasses occupy the extreme area accessible to soil clay,without occupying on accessible sites.展开更多
文摘The concrete mixed to sugarcane bagasse fibers and polypropylene fibers prepared with varied conditions were presented. The aim of our study is to formulate a concrete mixed with sugarcane bagasse fibers, which will gradually replace the conventional polypropylene fibers often used. We formulated all our concretes using the dreux gorisse method. We used an oven calibrated at 105˚C to dry the washed fibers. We also carried out tensile splitting and compression tests, at 28 and 112 days of age. The reinforcement mechanisms of sugarcane bagasse fibers and polypropylene fibers concretes were subjected to tensile splitting and compression tests after total immersion of the specimens in tap water at 28 and 112 days. Porosity at 28 days, mass loss and drying shrinkage at 80 days were also studied. The curing processes of concretes containing 0.10, 0.15, 0.17, 0.23 and 0.25% bagasse fibers were compared with those of ordinary concretes containing no fiber. The results showed that the addition of bagasse fibers reduces mechanical strength and porosity. In summary, specimens SBC-0.15 and SBC-0.17 showed the best results for all fibers. We plan to do the same work, but this time with raffia or palm nut fibers.
文摘Sugar cane molasses has proved cohesive and excellent performance on soil aggregates (fine particles). However, the microstructure of consolidated soil by the molasses is not yet subjected to research. The analysis results of sample without molasses (0%) and consolidated samples at 8%, 12%, and 16% show that the molasses acts on the structure of clayey fine soil developing its microstructure of airy matrix type (sample without molasses (0%) to a microstructure of a qualified type, more solid. Consolidated samples to 8%, 12%, 16% of molasses). We also observe the presence of inter-aggregate pores (mesopores) of similar size in all samples. The results of porosimetrical analyses (BJH) of the sample without molasses and consolidated samples to 8%, 12%, and 16% show that simultaneous porous volumes of samples are reduced with the increasing of molasses quantity. This latter, therefore, acts on the porous volume (micropore 2 nm and mesopore 9 nm) by reducing them which really means, molasses occupies the porous volume of the sample. However, this sample seems not to have any effect on the size of mesopores 9 nm. Thus, this product induces the evolution of the soil structure towards the highly dense and condensed structure. Consequently, materials in consolidated soil by molasses will have mechanical properties far superior to those of materials consolidated soil without molasses.
文摘Sugar cane molasses is often poured out on roads with soil in the city of Nkayi,Republic of Congo in order to reduce the dust.Nitrogen physical adsorption has allowed us to collect information on the state of the accessible total area according to the quantity of sugar cane molasses.The adsorption isotherms,the specific area,the adsorbed quantity of nitrogen on a Qm mono layer,the number of molecules constituting the adsorbed sugar cane molasses(n′)have been examined.The obtained results show that the quantity of sugar cane molasses in the material does not modify the adsorption isotherm of nitrogen of type IV that remains and a hysteria loop of type H4 in all samples,this justifies the monocoat-multicoat adsorption mechanism with capillary condensation and mesopores presence in the structure of materials.Materials with elaborated raw soil by clayey fine soil used are mesoporous materials.More of 50×1018 molecules constituting sugar cane molasses occupy the extreme area accessible to soil clay,without occupying on accessible sites.
