etude comparative de la résistance et de la durabilité des différents béton à base

Abstract

Several regions in Algeria suffer from lack of construction sands, which leads to their import from other regions, thus imposing more cost and delay in construction completion time.

Therefore it is necessary to look for alternatives to natural sand without sacrificing concrete / mortar performance. In this work, we study experimentally the effect of crushed sand (M-sand) in concrete by replacing natural sand at percentages of (0%, 40%, 45%, 50%, 55%, 60% and 100%) while developing a concrete with a targeted resistance of 45 MPa. The studies are conducted to investigate the effect of natural sand when replaced by crushed sand on the mechanical properties and durability of concrete, such as compression, tensile and flexural strength, absorbency and permeability of concrete at age of 7, 28 and 60 days. The results show that there is an increase in compressive strength with the replacement of 0 to 100% of natural sand by crushed sand, with maximum values of increases in strength with the percentage of 45% and 50%. The increase in the strength was about 15% compared to concrete with natural sand. The studies have revealed that for the use of crushed sand in concrete for construction, the proposal is acceptable for grade concrete (35/45) which also reduces the exploitation of natural sand. ت ديدعلا نم قطانملا يف رئازجلا نم صقن لامر ءانبلا امم بجوت اهداريتسا نم قطانم ىرخأ ضرفو ديزملا نم ،ةفلكتلا كلذل تعدتسا ةجاحلا ثحبلل نع لئادب لامرلل ةيعيبطلا نود ةيحضتلا ةيمهأب و رود ةناسرخلا /طلاملا .نم للاخ اذه لمعلا ، انمق ةساردب ريثأت رلالام ةرسكملا (M-sand )يف ةناسرخلا نع قيرط لادبتسا لامرلا ةيعيبطلا تاذ بسنلا ةيوئملا ةيلاتلا(0٪ ، 40٪ ، 45٪ ، 50٪ ، 55٪ ، 60 ٪ و 100 ٪ )ريوطتو ةناسرخلا عم ةمواقملا ةفدهتسملا نم 45 Mpa .دقل انيرجأ تاسارد ءاصقتسلا ريثأت لئادب لمرلا يعيبطلا لمرلاب رسكملا ىلع صاوخلا ةيكيناكيملا ةناتمو ةناسرخلا ، لثم طغضلا ، ةوق دشلا ، ءانثنلاا ، صاصتملاا ةيذافنو ةناسرخلا اهرمع 7 ، 28 و 60 اموي .رهظت ةجيتنلا نأ كانه ةدايز يف ةوق طغضلا امل تلدبتسا لامرلا ةيعيبطلا لامرلاب ةروسكملا نم 0 ىلإ 100٪ ، عم ميق ىوصق يف تاطلخلا تاذ بسنلا 45٪ و 50٪ .تناكو ةدايزلا يف ةمواقملا يلاوح 15 ٪ ةنراقم عم ةناسرخ لامرلا ةيعيبطلا .دقل تفشك تاساردلا نأ مادختسا لمرلا رسكملا يف ةناسرخلا ءانبلل دعي احارتقا

ً لاوبقم ةبسنلاب ةناسرخل فصلا (35/45 )امم للقي ا ً ضيأ نم للاغتسا لامرلا ةيعيبطلا