engleski

Properties of Low Strength Self-Compacting Concrete with Recycled Brick as Aggregate

Clay brick waste is usually delivered to the landfill sites for disposal. The utilisation of recycled brick aggregate (RB) in self-compacting concrete (SCC) has the potential to reduce both the environmental impact and financial cost. Due to increasing charges of landfill and scarcity of natural coarse aggregate (NA), recycled brick aggregate (RB) derived from masonry waste is of increasing interest in construction industry. In the presented study, RB is used as full re- placement of natural aggregate (NA) to produce low strength self- compacting concrete (SCC). Nine different SCC mixes were produced. The water to binder ratio and water to powder ratio were kept the same for all concrete mixtures. The impacts of RB on the key fresh properties such as filling ability and passing ability of SCC, and on the properties in his hardened state were investigated. Based on experimental results, conclusions are made about usage of crushed bricks as partial replacement of natural aggregate in SCC for precast concrete blocks which will serve as steel and R/C frame infill. It is well-known fact that common masonry infill significantly affects the structural behaviour of frames. This type of structures is still considered as ‘earthquake risk’ structural systems so our intention is to improve the structural behaviour of these systems by applying an infill which may possess beneficial characteristics from the aspect of frame-infill interaction. This puts a new perspective on the use of crushed clay bricks as SCC aggregate with the additionally benefit of providing a sustainable management of such material.

crushed brick, self-compacting concrete, low strength, mechanical properties

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