Effect of silica fume on the compressive strength and modulus elasticity of self-compacting high strength concrete

Ade Lisantono,Y P B Pratama

doi:10.1088/1755-1315/426/1/012057

Abstract

Self-compacting high strength concrete is one of the concrete that is needed in a green construction of building. In order to improve the workability of self compacting high strength concrete with silica fume which can be applied on the green construction building is needed. This study is aimed to get the optimum percentage substitution of silica fume by 0%, 5%, 10%, 15%, and 20% of cement on the self-compacting high strength concrete. The workability of the concrete will be tested using slump flow test and L-shaped box test then compared to EFNARC requirement for self-compacting concrete. The results show that the slump flow test and L-shaped box test of the concrete comply with the EFBARC requirement. The compressive strength of the concrete tested at 28 days with substitution of silica fume of 0%; 5%; 10%; 15%; and 20% were 34.33 MPa, 36.78 MPa, 50.98 MPa, 52.82 MPa, and 36.78 MPa, respectively. While the modulus elasticity of the concrete tested at 28 days with substitution of silica fume of 0%, 5%, 10%, 15%, and 20% were 21883 MPa, 22410 MPa, 22590 MPa, 22680 MPa, and 21874 MPa, respectively. So the optimum substitution of silica fume in self-compacting high strength concrete using local quartz sand and quartz powder is 10% up to 15%.

Highlights

Concrete is one of useful materials in construction building which is composed of cement, coarse and fine aggregate, water, and sometimes added by additives if necessary
The requirement for the slump flow is 600 to 800 mm. It can be seen from the result of slump flow of this research were in the range of EFNARC requirement
These confirmed to the results that the optimum compressive strength of self compacting high strength concrete were 10% and 15%

Summary

Introduction

Concrete is one of useful materials in construction building which is composed of cement, coarse and fine aggregate, water, and sometimes added by additives (admixture) if necessary. The normal weight concrete usually has the compressive strength between 20-40 MPa and pouring, flowing, and compacting in the formwork by using a vibrator and it has a noise in the construction of building. According to Okamura and Ouchi [1] that the concept of Self-Compacting Concrete (SCC) was proposed by Okamura and developed by Maekawa et al at the University of Tokyo [2] and [3]. It is a good alternative for structural elements which has complex and difficult shapes, e.g. very thin or curved members, especially in the element of structures which has the presence of congested reinforcement.

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Results

Conclusion