Abstract
Abstract The mechanical and physical properties of the crushed aggregate have been studied. The properties of crushed aggregate, which produced from recycled aggregate concrete is not discussed in the literature yet despite it could be a choice in some circumstances like in case of demolishing the structures that already constructed by recycled aggregate concrete. Twenty-two types of self-compacting high-performance concrete made by coarse natural aggregate and coarse recycle concrete aggregate have been crushed and their properties have been studied. The main findings of the present study that, the Los Angeles index and water absorption of crushed aggregate is affected by the coarse recycled concrete aggregate dosage in its parent concrete, as well as, incorporating cement replacing materials in parent concrete help to enhance the abrasion resistance of crushed aggregate.
Highlights
Aggregate is the most fundamental component of construction, which uses as an unbound material
The main goal of the present study is to investigate the properties of different types of crushed aggregate by taking into consideration the properties of its parent concrete, which is either Natural Aggregate (NA) concrete or Recycled Aggregate Concrete (RAC)
Using crushed aggregate is hampered by the lack of technical confidence in its practical use due to its different behaviors like high porosity, high water absorption capacity and low density, which negatively affected the performance of the recycled aggregate concrete if it is compared with the natural aggregate concrete
Summary
Aggregate is the most fundamental component of construction, which uses as an unbound material It constitutes the majority of the volume of concrete and it is one of the most frequent materials within recycling, the focusing on reusing of crushed concrete should be on the high level of priority as one of the logical options [1], [2]. As new concrete structures are made with RCA, these will eventually reach the end of their service life and will be demolished and new crushed aggregate will be produced. This new aggregate will have different properties that need to be assessed [5]-[7].
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