EXAMINATION OF STORAGE STABILITY BEHAVIOUR OF POLYMER MODIFIED BITUMEN INVOLVING NANOCLAY

Year 2019, Volume: 3 Issue: 1, 49 - 55, 12.06.2019

Jülide Öner

Abstract

In recent years, the use of
nanomaterials has become widespread in the modification of bitumen due to
developing nanotechnology. It has been observed that the physical and rheological
properties of base and modified bitumens have improved as a result of the use
of nanomaterials. In addition, the use of nanomaterials for the solution of the
phase separation problem seen for the polymer modified bitumens had a positive
effect. In this study, the effect of adding nanoclay into the polymer modified
bitumen samples on storage stability was investigated.
Styrene-Butadiene-Styrene (SBS), which is a widely used polymer type and
Halloysite is a nanoclay type were determined as additives. The additive ratios
were determined as 3%, 5% for SBS and 2%, 4% for Halloysite according to the
studies in the literature. Modified bitumen samples were produced by high shear
mixer. The polymer was added into the base bitumen then Halloysite was added in
to the polymer modified bitumen during the production process. After the
modified bitumen production, thin section samples were taken from each sample
and examined under a microscope and the samples were subjected to the storage
stability test. According to the results of the experiments, it was observed
that Halloysite additive improves storage stability. However, this improvement
is more effective in low polymer percentage. As the percentage of polymer
increases, the improvement effect decreases, phase separation increases.

Keywords

Modified Bitumen, Polymer, Nanoclay, Storage Stability, Phase Separation

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