CD Tesis

Penentuan Stabilitas Penyimpanan Aspal Modifikasi Karet Alam Dengan Metode Gabungan Fluid Flow Dan Phase Field

---

The development of road infrastructure in Indonesia is very rapid to keep pace with the growth of vehicles. However, the structure of road pavements in Indonesia is not optimal and causes various problems due to overload and Indonesia's climate. For this reason, asphalt binders are needed that are hard, have high softening points, are elastic and have good adhesion to improve pavement performance. Improved asphalt binder performance can be done by adding additives such as natural rubber or, better known as natural rubber modified asphalt. However, natural rubber modified asphalt shows poor storage stability problems. This is due to differences in density and viscosity between components of natural rubber modified asphalt.
This study aims to evaluate the performance of natural rubber modified asphalt to obtain optimum conditions including natural rubber content, sulfur additive content, storage temperature and storage time. Next, develop a model to predict storage stability and simulate phase separation on natural rubber modified asphalt using Comsol Multiphysics to determine the optimum storage time. Before being mixed in asphalt, crumb rubber is first masticated with a plasticizer and antioxidant TMQ. Furthermore, crumb rubber was added to asphalt with levels of 8, 10, and 12% and a stability test were carried out at 130 and 160oC for 48 hours. Furthermore, a model was developed to predict the phase separation in modified asphalt. The simulation results are used to predict the optimum storage time of modified asphalt before phase separation occurs.
The experimental results showed that modified asphalt with various levels of rubber experienced storage stability problems after 48 hours. The addition of sulfur additives did not significantly affect the increase in storage stability. The optimum addition of natural rubber at 10% crumb rubber content with a difference in softening point (TBottom – TTop) reached 11.6°C. The simulation results show that asphalt modified with crumb rubber SIR 20 has problems with phase stability between components after 12 hours of storage at 160°C without stirring. However, the combined Incompressible Navier-Stokes and Phase Field model is not accurate enough to describe the phase separation in crumb rubber modified asphalt SIR 20. The percentage error (% error) obtained from the density data shows an average of 3.68%, and from the data viscosity obtained percentage error (% error) more than 10%.
Keyword : comsol multiphysic, crumb rubber, natural rubber modified asphalt, phase field, softening point

---

Ketersediaan

Informasi Detail

Judul Seri

-

No. Panggil

10 25. 222 (0001)

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Teknik Kimia., 2022

Deskripsi Fisik

xiii, 142 hlm.: ill.: 29 cm

Bahasa

Indonesia

ISBN/ISSN

-

Klasifikasi

10 25. 222 (0001)

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

TEKNIK KIMIA

Info Detail Spesifik

-

Pernyataan Tanggungjawab

FATAH

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar