### Effects of Graded Concrete on Compressive Strengths

*Aylie Han, Buntara Sthenly Gan, M. Mirza Abdillah Pratama*

**Abstract**: Concrete

is a favoured building material due to its ease of production

and use. Even though the concrete mix is

designed to have a uniform strength throughout the entire member, casting, as

well as the basic characteristics of the concrete materials, could yield a

non-homogeneous constitution, resulting in a concrete strength gradation as a

function of the depth of the member. A functionally continuous and smooth strength

gradation of the concrete member along its axis or section is defined as graded

concrete. The objective of this research

is to analyse the influence of two different concrete compressive

strengths that composed the graded

concrete member. The

study is split into two parts: the

experimental work describing and identifying the mechanical properties of

functionally graded concrete and the finite element analysis implementing these

property variations in a model. The results showed that the concrete gradation

influenced the ultimate strength of a member negatively and altered the stress

distribution and displacement response of the specimen.

**Keywords**: Compressive strength; Concrete; Experimental study; Finite element analysis; Graded concrete

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