The Use of Recycled Concrete Powder as Supplementary Cementitious Materials for Manufacturing Concrete

Abstract

Construction development is inevitable, while despite its advantages and its benefits, it may lead to several problems related to landfill and its storage, referring to the high volumes of concrete waste currently generated annually, almost 2.0 ton/per capita according to Eurostat. In Algeria, the government has integrated waste management strategy [3] provision to recovering 60 % of construction waste by 2035, which can translate to an urgent need to find innovative ways to recycle concrete waste. One is using those wastes to produce aggregates; however, around 20 % of those aggregates represent fines, wich can lead to several issues if not considered in the concrete mixture. This work is an investigation that allows for using this fine fraction as partial replacement of cement. The result confirms the feasibility of using this material efficiently by applying an optimization process, ensuring an optimal cement replacement percentage.

Keywords

• recycle concrete powder
• characterisation
• mortar
• concrete