In this study, KS F 2405 was used to investigated the compressive strength of property of high performance concrete (HPC) using the fly ash and silica fume. The experiments were carried out silica fume-binder ratio from 5% (SF5) and fly ash 25%+silica fume 5% (FA25SF5). The compressive strength of HPC determined on 7days and 28days.

This paper addresses the tensile strength of high performance concrete with fly-ash, silica fume. Test variables of this study is replacement ratio of admixture. Test results showed that 7 days tensile strength of specimen SF5 is higher than that of specimen FA25SF5. However, 28 days tensile strength of specimen SF5 and FA25SF5 had similar value.

The objective of this study is to investigate the elasticity of high performance concrete replacement blast furnace slag. Experimental variables of this study are modulus(100×100mm, 150×150mm). And test results were compared with existing equations.

In this study, KS F 2438 was used to investigated the modulus of elasticity of high performance concrete (HPC) of replacement fly ash, and test results were compared with existing equations. Korea, America and Japan have to use cylinder specimens by KCI(2011). However, in this study was used cubic specimens and the experimental variable of this study is size of cubic specimens.

As Concrete is construction materials which is unevenly mixed with cement, aggregate and water, compressive strength and modulus of elasticity is an important factor to seize movement of structures. The purpose of this study is to investigate a correlation compressive strength and modulus of elasticity according to the size of structures, and also to analyze and compare to prediction equation of many countries.

The objective of this study is to investigted the mechanical properties used cement mix-materials, blast furnace slag. Experimental variables of this study are replacement ratio of blast furnace slag.

Fly ash dumped generally pollutes environment in the world. With the aim of sustainable development, the contribution of fly ash in concrete to the mechanical properties should be investigated. Variation of the modulus of elasticity of concrete is an important factor to evaluate the performance. In this study, the experiments were carried out over water-binder ratios of 0.34 and fly ash-binder ratios from 0% to 30%. The elasticity of modulus of high performance concrete replacing fly ash were determined on 7days and 28 days.