Study on the Fluidity and Strength Properties of High Performance Concrete Utilizing Crushed Sand

Sangjun Park

doi:10.1007/s40069-012-0020-1

Abstract

Recently, it has been difficult to get natural sand for concrete due to an insufficient supply in Korea. Crushed sand was thought as a substitute and previous research has been focused on low fluidity and normal compressive strength (24–30 MPa). Study on high performance concrete using crushed sand is hardly found in Korea. In this study it was investigated that the effect of the crushed sand on fluidity and compressive strength properties of high performance concrete. Blending crushed sand (FM: 3.98) produced in Namyangju, Kyunggido and sea sand (FM: 2.80) produced in Asan bay in Chungnam. The final FMs of fine aggregate were 3.50, 3.23, and 3.08. W/B was set as 0.25 to get high performance. With the test results an analysis of relationship was performed using a statistical program. It was shown that strength property of concrete using crushed aggregate at the very early age or after specific time was mainly affected by strength development properties of binders instead of the crushed sand.

Highlights

In recent years, it has been taken a growing interested in the shortage of natural fine aggregate having good quality across the country, because of deficient natural sand supplies and increased construction demands
In this study it was investigated the practical use of high performance concrete with various blending ratios of both crushed sand (CS) and sea sand (SS) produced in Korea and evaluated the mutual correlation of mixing parameters using SPSS software
It was found that: (1) Blended aggregate met the range of optimal fineness modulus for concrete when the bending ratio of CS was below 30 %

Summary

Introduction

It has been taken a growing interested in the shortage of natural fine aggregate having good quality across the country, because of deficient natural sand supplies and increased construction demands. The use of the blended aggregates still has problems, which is only ordinary concrete can be applied due to the lower quality of it (Celik 1996). It is needed high quality concrete using improved crushed aggregate in many recent constructions it has not been studied. In this study it was investigated that the practical use of high performance concrete with various blending ratios of both crushed aggregate and natural sea aggregate produced in Korea (Park 1998; Kim and Lee 1995; Chi et al 2006). Based on the experimental results it was evaluated the mutual correlation of mixing parameters using SPSS (statistical package for the social sciences) software

Experimental Design and Materials

Particle Size Distribution and Fineness Modulus

Concrete Mix Property

Findings

Conclusion