Etude D'un Béton À Haute Performance À Base De Sable De Dune Destines Aux Ouvrages En Milieu Agressif Et Très Agressif

Résumé: level fluctuations of Ouargla ,ground water, the salinity of this water, have very negative consequences in terms of infrastructure in various constructions in ordinary concrete, including hydraulic To withstand the fluctuations of the groundwater and aggressive agents in the drylands. The design of a special high-performance concrete BHP is required. The study is based on the confection of five concrete compositions (B10, B20, B30, B40 and B50) to obtain a good performance. The compositions of the concretes studied are: B10: 100% ashless alluvial sand palm. B20: 100% sand dune ashless palm. B30: 75% sand and 25% alluvial sand dune ashless palm. B40: 75% sand and 25% alluvial sand dune with palm ash. B50: 100% sand dune with palm ash. The concrete obtained was subjected, first, test compression and tension, on the other hand, the performance tests is chosen testing carbonation (donations sewage systems) and the influence of water sabkha on the strength of concrete. The aim in this study is the formulation of a high-performance concrete using locally available materials, including the valuation of fixed sand dune with alluvial sand and ash with added palm. The obtained Results in this research: - the utilisation of four classifications reduce the granular spaces and increase the compactness and the resistance - the introduction of 25 % sand dune in the conception of the concrete and 5% of ash ,increase the resistance value to 100%,in the concretes B30 and B40 - we can say clearly that the composition of the concrete with highly performance is the concrete B40 with resistance equal at 54 mpa in 28 day

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