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Open Journal of Composite Materials 2023年第3期13卷 47-55页

作者： Assoumou Joseph Yomanfo Obre Sery Paul Jolissaint Edjikémé Emeruwa maméry adama serifou Soil Water and Geomaterials Laboratory (UFR-STRM) Felix Houphouet-Boigny University Abidjan Ivory Coast

This work focuses on the development of carpets from sand, fabrics of cotton fiber and mosquito nets and rubber latex. Following a study on the choice of the best formulations, the quantity of rubber latex used for shaping varies between 14% and 18% (latex/sand + latex ratio) for the carpet with the fabric of mosquito nets and between 16% and 18% for the one made with the fabric of cotton fiber. Thus, with a mixture of sand, fiber fabrics (cotton and mosquito nets) and rubber latex, carpets were developed. In addition, the wear test carried out on these samples indicates that it is possible to produce carpets with the new material made of rubber sand and latex: SABLATEX At room temperature. Following the characterization test, it resorts to only 16% latex with cotton fiber fabric, allowing to have carpets with good mechanical characteristics.

关键词： Carpet Rubber Latex Wear Test Latex Content Fiber Fabrics

Mechanical Characteristics Test of Concrete Steel Bars Available in Côte d’Ivoire

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Journal of Materials Science and Chemical Engineering 2020年第9期8卷 1-13页

作者： Conand Honoré Kouakou Ibrahima Bakayoko mamery adama serifou Edjikémé Emeruwa Université Félix Houphouë t-Boigny UFR des Sciences de la Terre et des Ressources Minières Laboratoire des Sciences du sol de l’eau et de Géomatériaux Abidjan C&#244 te d’Ivoire

Buildings collapse has now become a recurrent phenomenon in Côte d’Ivoire. Therefore, this study was conducted to find out the reasons for these disasters, and check in particular to the extent, and concrete steel bars produced in Côte d’Ivoire and used in buildings’ structures are involved. Samples having 6, 8, 10 and 12 mm in diameter steel taken from the five (5) major manufacturers or suppliers of the Ivorian market were subjected to physical, chemical and mechanical tests to determine their performance. A comparison of these results with the NF EN 10080 and NF A35 080-1 standards made it possible to calculate the probability to have out-of-standard products in a structure. Pieces having 60 cm were cut from three bars of the same thickness and then subjected to tests. These are the chemical test by optical emission spectrometer, physical tests by caliper measurements of diameter, height of bolts and ribs and calculation of linear mass, and tensile tests with the help of hydraulic press. These tests made it possible to determine the characteristics of the steel bars. Then, these characteristics were compared with standards NF EN 10080 and NF A35 080-1, in order to judge their conformity for construction. Finally, the likelihood of having non-standard steel bars in a structure is calculated. These tests indicate that the relative surfaces of the bolts of the various bars HA6, HA8, HA10 and HA12 vary from 0.146 to 0.323 respectively;0.120 to 0.312;0.101 to 0, 297 and 0.142 to 0.482. Likewise, their calculated linear masses of these bars are respectively between 28.3 mm2 and 222 g/m;50.3 mm2 and 395 g/m;78.5 mm2 and 617 g/m;and 113 mm2 and 888 g/m. In addition, their yield strengths and elongations at break vary from 344 MPa to 582 MPa and from 0.2% to 15% respectively. According to analysis of these results, 100% of steel bars woul

关键词： Building Collapse Steel Bars Standards Adhesion Mechanical Performance

Physical and Mechanical Characteristics of Ash Concrete from Palm Nut Shells: Pouzzolanic Effect

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Open Journal of Applied Sciences 2022年第10期12卷 1595-1603页

作者： serifou mamery adama Jolissaint Obre Sery Paul Ouattara Souleymane Emeruwa Edjikémé Soil Water and Geomaterial Sciences Laboratory UFR-STRM University Félix Houphou&euml t Boigny Abidjan Ivory Coast

The use of agricultural waste in construction is an advantage favorable to environmental sanitation, the preservation of non-renewable resources but also to the execution of an ecological work. The objective of this work is to study the influence of the addition of palm nut cockles ash as an adjuvant on the physico-mechanical properties of concrete. For this study, ordinary concretes and ash concretes were made and subjected to physical and mechanical characterization tests at different maturation periods. The results of the tests carried out indicate that the presence of ash reduces the workability and porosity of the concrete and then increases the density of the concrete to 6.3%. In addition, we found that incorporating the ash improves the mechanical strength of the concrete compared to the control concrete. Thus, the compressive strength of ash concrete is 32.07 MPa and that of splitting is 2.76 MPa at 28 days, which is satisfactory vis-à-vis the threshold of construction projects for ready concrete for use, which recommends a minimum of 25 MPa (compression) and 2.6 MPa (splitting) at 28 days. This improvement in mechanical performance can be attributed to the pozzolanic effect of the constituents of the ash. Therefore, the ash from palm nut shells can be used to improve the mechanical properties of concrete.

关键词： Recycled Concrete Lvegetable Matter Mechanical and Physical Properties

Study of the Evolution of Properties of Concrete Containing Used Tire Aggregates

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Geomaterials 2024年第4期14卷 49-58页

作者： mamery adama serifou Ouaga Jean Bruce Nataniel Gboga Bleh Raoul Ulrich Kouassi Edjikémé Emeruwa Laboratoire des Sciences du Sol de lEau et de Gomatriaux UFR des Sciences de la Terre et des Ressources Minires Universit Flix Houphout Boigny Abidjan Cte dIvoire Institut National Polytechnique Flix Houphout-Boigny Yamoussoukro Cte dIvoire Laboratoire de Gomatriaux et de Gotechnique Dpartement des Sciences de la Terre UFR Environnement Universit Jean Lorougnon Gud Daloa Cte dIvoire

Concrete is generally composed of cement, water, gravel, and sand. However, some research focuses on substituting aggregates with waste materials. In this study, used tires are used as a substitute for gravel. Characteristics such as tensile strength, compressive strength, and porosity were monitored at 7, 14, and 28 days of maturation. The results show that aggregates made from used tires are suitable for concrete production and can replace natural gravel. Regarding the formed concrete, low substitution rates lead to improved concrete properties, but only at an early age. A reaction between the cement and rubber could be the underlying cause. Additionally, the products of this reaction may mitigate the evolution of the compressive strength of the concrete over time.

关键词： Concrete Used Tire Porosity Mechanical Strength