EFFECTS OF BASALT AGGREGATES ON CONCRETE PROPERTIES

Yıl 2018, Cilt: 13 Sayı: 2, 68 - 79, 14.04.2018

Esra Tugrul Tunc

Öz

Concrete
is one of the most important building materials of engineering structures and
especially construction applications. Since compressive strength is the most
effective parameter for determining the strength of concrete, it is one of the
most important mechanical properties to be determined in concrete. Aggregate
grain strength, aggregate granulometry, cement strength, water/cement ratio,
and concrete fill rate are the most important factors affecting the compressive
strength of concrete. The quality of concrete is directly related to the
aggregate that is volumetrically found most in the concrete. It is suggested
that high strength, hard, easy to obtain and easy to access basalt aggregates
are preferred to obtain high-performance concrete. The present study aims to
investigate the fresh and hardened concrete properties of the concrete produced
by the basalt aggregates extracted in the Elazig region. For this purpose,
concrete mixtures containing cement dosages of 300, 350 and 400 kg/m³
and containing different sizes of basalt aggregates were prepared. The concrete
compressive strengths were tested for cubic samples of 150x150x150mm and
100x100x100mm, while the tensile splitting strengths were tested for cubic
samples of 150x150x150mm. As a result of the tests performed, as the cement
dosage increased, the slump values of the concrete mixtures and the strength of
the concrete increased. The micro-structural structure of existing aggregates
was investigated, and strong molecular bonds were observed with SEM analysis
conducted within the scope of this study. In addition, a comparison was made
with reference to the concrete samples prepared with different types of
aggregates used in previous studies. It was seen that the compressive strength
of the concrete containing the basalt aggregate was generally higher. In this
experimental study, it was concluded that the concretes produced with basalt
aggregates might have better mechanical properties and be environmentally
friendly and economical.

Anahtar Kelimeler

Basalt Aggregate, Concrete, Mechanical Properties, Fresh and Hardened Concrete Properties, Sem Analyses

Kaynakça

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