Akademik Veri Yönetim Sistemi
2nd International Conference on Engineering and Natural Sciences, ICENS 2016, Sarajevo, Bosna-Hersek, 24 - 28 Mayıs 2016, ss.634
In this study; the effect of polypropylene fibre
additive and plasticizer additive in different ratios on vertical abrasion,
water absorption and density of hardened concrete was analyzed. Water-cement
ratio was stabilized in all mixtures. Water-cement ratio is 0.52.
Hyper-plasticizer chemical additive was used in the mixtures. Additive ratios
in mixtures are 0.6%, 0.8%, 0.9% and
1.1% of cement weight. 25 series of
samples were obtained together with non-fibrous control sample. Vertical
abrasion, water absorption and density tests were done 28 days of samples. Each
experiment was done at least on two samples and averages of experiment results
were obtained. Vertical abrasion test was done on 70x70x115 mm samples with F80
alumina emery powder. As a result of the experiment, abrasion width on samples
was measured. Abrasion width of C12, D6, D12 and E12 were lower than control
mixture. In other words these mixtures exhibited less abrasion compared to
control mixture. Abrasion width of other mixtures was higher than control
sample. 70x70x115 mm samples were used as well in water absorption experiment.
While water absorption value of control sample was 3.43%, water absorption
values of polypropylene fibre reinforced concrete vary between 2.76% and 4.63%.
It was observed that polypropylene fibre additive generally increases water
absorption value of concrete. However, water absorption value was lower than
control samples in every D added mixture. Cubic (15x15x15 cm) and cylinder
(15x30 cm) samples were used for density experiment. Density of cubic samples
varies between 2.39 and 2.42, density of cylinder samples varies between 2.39
and 2.43. Polypropylene fibres and chemical additive ratio have but little
effect on density of concrete.