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Zina Mansouri

Hachem Chaib

Ali Kechired

Abstract

This work involves studying the evolution of durability of sand concrete containing two mineral additives (crushed dune sand and carbon nanotubes (CNTs)) in four storage media (free surface, plastic film, tap water and groundwater). The potential negative effects of adding these alternative materials can be reduced by adding very small amounts of carbon nanotubes to the cement system. This study investigates the feasibility of using these alternative materials and carbon nanotubes (CNTs) in the production of lightweight concrete. The first step of our research was to characterize the ingredients used to produce sand concrete. Then, we studied the addition of 2% carbon nanotubes (CNTs) and dune sand powder from the Ouargla area (5%, 10%) as well as the combination of the two additions (2% CNT + 5% SDP; 2% CNT + 10% SDP). Flexural tensile and compressive strength tests were carried out after 7, 28, 90 and 120 days to be able to estimate and evaluate the durability.


The results obtained in this experimental study allow us to say that sand concrete with 5SDP 2 CNT or 10SDP 2 CNT has a stable compressive strength after 90 days in tap water and groundwater. These sand concretes show a positive improvement in strength at all times in the storage medium "plastic film".

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