Fracture and Failure of Recycled Aggregate Concrete (RAC) – A Review

Hasan Dilbas; Özgür Çakır

Abstract

In the world, many countries put into effect the renewal plans and/or the laws and/or the regulations for recent engineering structures which have reached their lifetime, are risk prone and have been built lacking quality engineering, or without considering urban planning. Hence, many structures are demolished and this situation increases the amount of construction and demolition waste (C & DW). Also, resource consumptions are rapidly increased due to excessive constructional works. As a result of wide-spreading sustainability concept in the world, it is commenced that C & DW is used as recycled aggregate in engineering structures and is used in concrete to struggle with shortage of aggregate resources. In this perspective, researches are conducted to determine the engineering parameters of recycled aggregate (RA) and recycled aggregate concrete (RAC). The mentioned unfavorable situations in this literature research are cracked and fissured structure of RA and its negative effect on RAC. With regards to this, the present paper reviews the literature related to the fracture and failure of RAC and mainly the related topics are based on internal structure properties of RA and fracture behavior of RAC. According to researches, interfacial transition zone (ITZ) and RA properties are more effective on the cracks and the fracture modes formations. Some methods (for example, mixing methods, surface coating methods) are proposed in the literature to enhance the negative effects of RA on RAC. Also the researches on the fracture due to fatigue of RAC, is found to be very limited in the literature.

Fracture and Failure of Recycled Aggregate Concrete (RAC) – A Review

Abstract

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