2 research outputs found
POLYMER MODIFIED ASPHALT NANOCOMPOSITES
No full textAsphalt 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
Rheology and microstructure of polymer-modified asphalt nanocomposites
No full textAsphalt modification with polymers has utilized the advantages of nanotechnology including nanoclays as one of the components in addition to polymers. This led to the metamorphosis of polymer-modified asphalts into a new class of material called polymer-modified asphalt nanocomposites which offer the cumulative characteristic features obtained by the polymer modification of asphalt as well as the innovative properties experienced from polymer nanocomposites. Polymer-modified asphalt nanocomposites including styrene butadiene and ethylene vinyl acetate have revealed additional features which were not available in polymer-modified asphalts. The compositional complexity provides a great challenge in addressing the structure property relations prevailing in these materials. This paper describes microstructural features as determined by Qwin Plus Software analysis and the rheological properties on compositional changes
