Publications Scientifiques

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Author: search.filters.author.Safi, BrahimSubject: search.filters.subject.Compressive strength

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Now showing 1 - 7 of 7
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    Use of refractory bricks as sand replacement in self-compacting mortar
    (Taylor & Francis Online, 2017) Aboutaleb, Djamila; Safi, Brahim; Chahour, Kahina; Belaid, Amrane
    This present work investigate the possibility of using refractory bricks (RB) as fine aggregates (by partial and total substitution of natural sand) in self-compacting mortars (SMCs). For this, an experimental study was carried out to evaluate physical and mechanical properties ((bulk density, compressive and flexural strength) of the self-compacting mortars (SCMs) with partial and total substitution of natural sand (NS) by crushed refractory bricks (RB) at different ratio (BR/S= 0, 10, 30, 50 et 100%) by weight. The results obtained show that the RB (0/5 mm class), can be used as fine aggregates for self-compacting mortar, without affecting the essential properties of mortar. However, the performances of RB-based mortar (100% as sand), were better and are suitable for a fluid concrete (such as self- compacting concrete)
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    Improved behaviour of mortars at a high temperature by using refractory brick wastes
    (Indersciences Publishers, 2015) Saidi, Mohammed; Safi, Brahim; Bouali, Khaled; Samar, Madjid; Benmounah, Abdelbaki
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    Physico-mechanical properties and thermal behavior of firebrick-based mortars in superplasticizer presence
    (Elsevier, 2016) Saidi, Mohammed; Safi, Brahim; Benmounah, Abdelbaki; Megdoud, Nadjiba; Radi, Faiza
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    Use of wood waste (Aleppo pine) as a superplasticiser in self-compacting mortars
    (2014) Daoui, Abdelhakim; Safi, Brahim; Rezak, M.; Zerizer, A.
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    The use of seashells as a fine aggregate (by sand substitution) in self-compacting mortar (SCM)
    (Science Direct, 2015) Safi, Brahim; Saidi, Mohammed; Daoui, Abdelhakim; Bellal, Ahmed; Mechekak, Ali; Toumi, Kamel
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    The use of plastic waste as fine aggregate in the self-compacting mortars : effect on physical and mechanical properties
    (Elsevier, 2013) Safi, Brahim; Saidi, M.; Aboutaleb, Djamila; Maallem, M.
    This work aims to study the possibility of recycling waste plastic (polyethylene terephthalate (PET) used for the bags manufacture) as a fine aggregate instead of sand in the manufacturing of the self-compacting mortars. For this, an experimental study was carried out to evaluate physical and mechanical properties of the self-compacting mortars (SCMs) with plastic wastes. The sand is substituted with the plastic waste at dosages (0%, 10%, 20%, 30% and 50% by weight of the sand).The physical (bulk density, porosity, water absorption and ultrasonic pulse velocity testing) and mechanical (bulk compressive and flexural strength) properties of SCMs were evaluated and a complementary study on micro-structural of the interface of cementitious matrix and plastic waste. The measurements of physical and mechanical properties show that, in term of the density for materials, the mortars with 50% of plastic waste give better results than other proportion of the waste. Those mortars have a mechanical strength acceptable for lightweight materials. According to results obtained a reduction of 15% and 33% for mortar containing 20–50% plastic waste. A microscopic study of the interfacial zone (plastic–binder) has shown that there is an adhesion between plastic and cement paste (case 28 days of hydration)
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    Effect of the heat curing on strength development of self-compacting mortars containing calcined silt of dams and ground brick waste
    (2013) Safi, Brahim; Ghernouti, Y.; Rabehi, B.; Aboutaleb, Djamila
    The strength development of self-compacting mortars (SCM) containing calcined silt (CS) and ground brick waste (GWB) was investigated. The variables are the nature of addition (CS and GWB) in the binder and the heat curing at different temperatures (20 ºC and 60 ºC) at 7 and 14 days of curing. Two temperatures 20 and 60 ºC were applied to samples with intermediate levels (depending on the drying method applied to precast) for 18 hours in total. In this study, a Portland cement (CEMII), Calcined silt (750 ºC for 5 hours), ground waste brick, were used in the binders of SCM. The results show that the compressive strength to 14 days of mortars, increases with annealing (60 ºC) compared to that measured at 20 ºC. Also, values of compressive strength of mortars at 14 days that are close to those obtained without 28 days curing treatment. Indeed, a strength gain of about 20.5% and 27.3% was obtained respectively for the SCM with GWB and the SCM with CS. However, a small change in mass recorded for both types of mortars