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Digital archive of theses discussed at the University of Pisa

 

Thesis etd-05102011-105814


Thesis type
Tesi di dottorato di ricerca
Author
MARKANDAY SUBRAMANIAN, SURESHKUMAR
URN
etd-05102011-105814
Thesis title
POLYMER MODIFIED ASPHALT NANOCOMPOSITES
Academic discipline
CHIM/05
Course of study
INGEGNERIA CHIMICA E DEI MATERIALI
Supervisors
tutor Polacco, Giovanni
Keywords
  • Asphalt
  • Bitumen
  • Modification
  • Nanocomposites
  • Polymer
Graduation session start date
23/06/2011
Availability
Full
Summary
Asphalt one of the versatile materials of antique, inspite of its compositional
variations and complexities, widely employed in various applications like water
proofing, paving etc. Due to the complex physical and chemical nature, Asphalt
seldom performs well, without any modification. Amidst other materials, polymers
found to be most suitable for modifying asphalt to suit the application demands.
Nanomaterials, particularly invention of nanoclays, have enhanced the properties
of polymers manifold when introduced in polymer. Polymer Nanocomposites thus
obtained emerge with innovative properties which are not available with existing
polymers. Similar to the effect of nanoclay in polymer, polymers improve the
properties of asphalt. The hypothesis behind this work is to combine the
advantages of nanoclay in polymer and polymer in asphalt by introducing, polymer
and nanoclay in asphalt. Two different nanoclays, Cloisite 20A and Dellite 43B,
were introduced along with EVA by different methods such as Physical Mixing and
Melt Blending. This gave rise to Polymer Modified Asphalt Nanocomposites
(PMAN) a new class of material. Thermal, morphological, structural and
rheological properties were studied. Based on the above studies, fuel resistance
PMAN with EMA, EVA and SBS developed. Also, flammability of PMAN was
studied by developing new test method using Limiting Oxygen Index equipment.
From this research work, new class of materials (PMAN) based on polymer and
nanoclay with improved rheological and performance properties, fuel resistance
were developed.
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