Publications Internationales

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Author: search.filters.author.Chaid, RabahHas files: Yes

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    Impact of the nature of fibers on the physicomechanical behavior and durability of cement matrices
    (Springer, 2021) Aboutair, Wafaa; Chaid, Rabah; Perrot, Arnaud
    In this paper, the strength of concrete prismatic and cylinders concrete and reinforced with steel and polypropylene fibers are presented. Also, hybrid fibers with crimped steel and polypropylene were used in concrete matrix to study its improvements in strength and durability properties. The steel, polypropylene, and hybrid consisting of polypropylene and steel (crimped) fibers of various proportions by volume of cement were used in concrete mixes. Besides cubes, cylinders of 160 mm diameter X 320 mm high of concrete were cast with steel fiber, polypropylene fiber, and hybrid fiber, respectively, by volume of cement. The water absorption test was conducted on 28 and 90 days, and the test results show that the addition of steel and polypropylene fibers to concrete exhibits better performance. The test results show that use of steel fiber-reinforced concrete improves compressive strength and split tensile strength. The durability of such concrete is also improved
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    Characterisation and microstructure of high-performance concretes reinforced with metal fibres ripened in seawater
    (Taylor & Francis, 2019) Boutiba, Aldjia; Chaid, Rabah; Molez, Laurent
    High-performance concretes reinforced with metal fibres (SFRHPC) have multiple advantages when they are used in the marine environment. These materials provide high strengths at the young age that permit faster formwork stripping, resistance to hydrostatic thrusts due to the tides, structural elements sections’ reduction, as well as weight reduction of the structure, and the increase of the abrasion resistance to sand or gravel. The maritime works are exposed to specific seawater aggressions. Seawater contains aggressive salts, which damage the concrete and the steel that it may contain. These salts are mainly chlorides and sulphates. This study investigated the ripening of steel fibre-reinforced high-performance concrete, with 15% substitution of cement by blast furnace slag, in Rance (France’s seawater). This experimental study analysed the effect of 6 and 24 months of ripening of the sample, in aggressive water, on the characterisation of the concrete and the microstructure of the cement’s matrix and its fibres. Also, in this study, after two years of concrete conservation, we carried out the chemical and mineralogical composition of the seawater. The results showed that there is no significant alteration of concrete kept in seawater and the steel fibres were not altered. In other words, it stayed passivated even after two years of ripening
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    Effet du chlorure de sodium sur la durabilité des BHP
    (2012) Chaid, Rabah; Jauberthie, Raoul; Abadlia, Mohamed Tahar
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    Use of recycled plastic bag waste in the concrete
    (2014) Ghernouti, Youcef; Rabehi, Bahia; Safi, Brahim; Chaid, Rabah
    The aim of this study is to explore the possibility of re-cycling a plastic bag waste material (BBW) that is now produced in large quantities in the formulation of concrete as fine aggregate by substitution of a variable percentage of sand (10, 20, 30 and 40 %). The influence of the PBW on the fresh and hardened states properties of the concrete: workability, bulk density, ultrasonic pulse velocity testing, compressive and flexural strength of the different concretes, has been investigated and analyzed in comparison to the control concrete. The results showed that the use of PBW improves the workability and the density, reduces the compressive strength of concrete containing 10 and 20 % of waste by 10 to 24 % respectively, which have a mechanical strength acceptable for lightweight materials, remains always close to reference concrete (made without PBW). The results of this investigation consolidate the idea of the use of PBW in the field of construction, especially in the formulation of concrete
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    Experimental study on steel fibre reinforced self-compacting concrete incorporating high volume of marble powder
    (Taylor & Francis, 2014) Haddadou, Naima; Chaid, Rabah; Ghernouti, Youcef
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    Resistant to sulphate attack of high performance fibre concrete with the addition of slag
    (Stowarzyszenie Producentow Cementu, 2015) Boutiba, Aldjia; Chaid, Rabah; Molez, Laurent; Jauberthie, Raoul
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    Durability of high performance concrete in an aggressive environment
    (Trans Tech Publications, 2014) Merida, Ahcene; Kharchi, Fattoum; Chaid, Rabah