Effects of fillers on morphological, mechanical, flow and thermal properties of bituminous composites

Download

index.pdf

Date

2006

Author

Tayfun, Ümit

Metadata

Show full item record

Item Usage Stats

276
views

109
downloads

There are many different types of fillers used for bitumen modification such as; silica, limestone, basalt, mica, oyster shells. Filler gives rigidity, stiffness or hardness, regulates thermal expansion and shrinkage, improves heat resistance, and modifies rheological properties of bituminous composites. The main objective of this study was to determine the effect of filler type and ratio on mechanical, thermal properties and morphologies of bitumen based composites. It was also aimed to improve the heat resistivity of the bituminous composite to obtain a material with good mechanical and heat isolation properties. Bituminous composites were prepared by using Brabender Plasti-Corder, PLV 151. Mixing was made at 180 ºC with 60 rpm for 15 minutes. Two grades of bitumen as 20/30 and 50/70 penetrations were used. CaCO3, CaO, mica, baryte, kieselguhr and silaned kieselguhr were used as fillers in this study. Ethylene vinyl acetate copolymer, styrenebutadiene rubber, and styrenebutadienestyrene block copolymer were used as polymers. According to the test results, using mica at low percentages had the effect of decreasing the viscosity of the bitumen due to its flow alignment property. Baryte gave high heat capacity and low heat conductivity to bituminous material. EVA containing samples showed the best combination on mechanical properties. The silanation process decreased the pore sizes as observed in mercury porosimetry experiments. A decreased amount of bitumen impregnation was obtained by the silanation process, clearly observed in SEM micrographs.

Subject Keywords

Plastics., Polymers.

URI

http://etd.lib.metu.edu.tr/upload/2/12607974/index.pdf
https://hdl.handle.net/11511/16103

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Processing and characterization of poly(ethylene terephthalate) based composites Kılınç, Mert; Bayram, Göknur; Department of Chemical Engineering (2004) Polymeric composites are any of the combinations or compositions that comprise two or more materials as separate phases, at least one of which is a polymer. By mixing a polymer with another material, such as glass, carbon, or another polymer, it is often possible to improve the desired properties of the polymer. In this study, ternary composites were prepared by using recycled poly(ethylene terephthalate), PET as the matrix material, short glass fiber (SGF) as the reinforcing filler and thermoplastic elasto...
Effects of chain extension and branching on the properties of recycled poly(ethylene terephtkalate)-organoclay nanocomposites Keyfoğlu, Ali Emrah; Yılmazer, Ülkü; Department of Chemical Engineering (2004) In this study, the effects of chain extension and branching on the properties of nanocomposites produced from recycled poly(ethylene terephthalate) and organically modified clay were investigated. As the chain extension/branching agent, maleic anhydride (MA) and pyromellitic dianhydride (PMDA) were used. The nanocomposites were prepared by twin-screw extrusion, followed by injection molding. Recycled poly(ethylene terephthalate), was mixed with 2, 3 and 4 weight % of organically modified montmorillonite. Du...
Effect of rigid rod molecular structures on the properties of regenerated and virgin poly(ethylene terephtalate) Duru, C. Zeynep; Bayramlı, Erdal; Department of Polymer Science and Technology (2004) In recent years,the recycling of plastic waste incerased worldwide.The basic impetus for this increase is the public awereness regarding polltuion of the environment.Many different types of recycling processes are being used to reduce the use of raw materials and to reduce energy consumption.PET recycling is one of the most important recycling processes.addition of thermotropic liquid crystalline polymers has also become wide-spread in recent years to increase their mechanical properties and other selected ...
Conductive coating materials Çakar, İlknur; Bayram, Göknur; Department of Chemical Engineering (2006) In this study, electrically conductive coating materials composed of epoxy resin and carbon black (CB) were prepared by applying two different mixing techniques (Grinding and Mechanical Mixing). The effect of carbon black addition, ultrasonication, mixing type and surface modification of carbon black on the morphologies, electrical and mechanical properties of the composites were investigated. According to test results, Grinding Method is much more efficient and for this method, percolation concentration wa...
Preparation and characterization of recycled polypropylene based nanocomposites Cengiz, Filiz; Yılmazer, Ülkü; Department of Chemical Engineering (2008) The aim of this study was to improve the mechanical properties of a recycled grade polypropylene. Polymer blends and nanocomposites were prepared by melt compounding method in a twin screw extruder. Cloisite® 15A, Cloisite® 25A and Cloisite® 30B were used as organoclays, and ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA) and maleic anhydride grafted polypropylene (PP-MAH) were used as compatibilizers. The effects of additive concentrations, types of organoclays and compatibilizers, processing con...

Citation Formats

Ü. Tayfun, “Effects of fillers on morphological, mechanical, flow and thermal properties of bituminous composites,” M.S. - Master of Science, Middle East Technical University, 2006.