Abstract
Self- curing is the potential of lightweight aggregate to absorption great amount of water thru mixing which prominently can moves to the paste during hydration process. Self- curing empowers a water to be distributes more evenly act out the cross section. Whereas, the external curing water is only able to penetrate several millimetres into concrete with low water cement ratio. Brick dust accumulates in the demolish site creates serious environmental contamination. This study investigates the effect of brick dust recovered from construction site on the Properties of mortar cured in three curing conditions. Mortar in this study produced using BD as cement additive with (2, 4, 6, and 8) % by weight of cement. BD was used as cement replacement (1, 2, 3, and 4) % by weight of cement. Three curing conditions were experienced in this study to identify whether BD can be used as self- curing agent. Compressive strength, Fresh and hardened density, water absorption, and modulus of rupture were tested. The results of compressive strength and modulus of rupture were decreased when BD used as cement additive and as cement replacement increase. However, they were higher for mortars cured in air conditions than those cured in water and partially water curing. Water absorption, was increased with the increase of (BD) when used as cement additive and replacement. It was indicated BD could be used as self- curing agent and could replace cement at specific ratios which will achieve economical profits and reduce environmental pollution.
Highlights
الانضاج الذاتي يعبر عن قدرة الركام الخفيف الوزن على امتصاص كمية كبيرة من الماء خلال عملية الخلط وحدوث الاماهة في حين ان الانضاج الخارجي يتغلل الماء, الانضاج الذاتي يمكن الماء من ان يتوزع بانتضام خلال مقطع الخرسانة تراكم غبار الطابوق سواء في اماكن.مليمترات قليلة داخل الخرسانة خصوصا عندما تكون نسبة الماء الى الاسمنت منخفضة
Fresh and hardened density was significantly decreased with an increase in (BD) in the two series A and R when used brick dust as cement addition and replacement by weight of cement
Compressive strength and modulus of rupture for the three groups cured in different conditions were decreased with increase of brick dust in mortar
Summary
الانضاج الذاتي يعبر عن قدرة الركام الخفيف الوزن على امتصاص كمية كبيرة من الماء خلال عملية الخلط وحدوث الاماهة في حين ان الانضاج الخارجي يتغلل الماء, الانضاج الذاتي يمكن الماء من ان يتوزع بانتضام خلال مقطع الخرسانة تراكم غبار الطابوق سواء في اماكن.مليمترات قليلة داخل الخرسانة خصوصا عندما تكون نسبة الماء الى الاسمنت منخفضة. The main objective of a management the west martials is in reducing the mass production of new, detecting ways to recycle and reuse as alternative for raw materials, Debieb, and Kenai, 2008. Proportion of this demolishing waste is masonry debris consisting of clay bricks. The objective of the present work is to investigate the possibility of reusing brick dusts waste in Portland cement mortar into two series mixes: as cement additive and as replacement by weight of cement. Mechanical properties will be examined to verify the possibility of using brick dust as cement additive and cement replacement and to work as self- curing agent
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