The effect of aggregate gradation on concrete fracture energy using the work of fracture method

Abstract

The micro-cracks that commonly occur in concrete structures are a potential source of crack propagation which leads to the possibility of catastrophic failure. Concrete cracks that occur propagating mainly along the interface zone that significantly conditioned by aggregate characteristics. Aggregate characteristics as concrete fillers have a significant role as a strain energy release medium known as fracture energy. This research is using an experimental investigation about the fracture characteristics of concrete using different gradations with a maximum diameter of 25 mm and 20 mm. The experiment includes a compressive strength test and a fracture parameter test. Three-point bend test was selected based on RILEM recommendations to calculate fracture parameters. The result has shown that the aggregate gradations used in concrete mixtures should take into account the effect on compressive strength and total fracture energy. Uniform gradations with smaller maximum sizes have high compressive strength but low fracture energy.

Fracture Simulation of Concrete Beams to assess softening behavior by varying different fractions of Aggregates

“…The ITZ, typically forming around the aggregates, is generally T T regarded as the weakest part [17,28,39]. For the present study, covering a range from low-strength concrete (M20) to highstrength concrete (up to M45), aggregate fractions of 38%, 40%, 50%, and 54% were selected [32]. Spherical aggregates were randomly distributed and used in this study.…”

Aplikasi Size Effect Law Pada Beton Marine dengan Pola Bukaan Tarik

“…Sehingga ketika beton dibebani, retak mikro lalu berkembang menjadi retak makro dan langsung membelah agregat kasar. Penelitian ini menggunakan diameter agregat maksimum 25 mm berbentuk angular sehingga ada perambatan retak pada permukaan agregat kasar (Muin et al, 2013) (Fidi et al, 2020). Agregat kasar yang berbentuk angular dengan diameter maksimum agregat yang besar bisa menjadi penahan retak (crack arrester) dan menambah kedaktailan dari = ( ) .…”