A pavement heating system was investigated as an alternative to chemical application on highway pavements. As a result, surface course asphalt mixes needed to be modified to develop improved electrical properties. The bituminous binder was outlined as that part of asphalt mixes that could be modified with filler-characterised additives. These additives included carbon black, pulverised fuel ash and iron powder. Samples were prepared and subjected to electrical tests in order to obtain the optimal additive content. The materials were subjected to rheological and electrical performance tests. Pulverised fuel ash had limited influence on the inherent electrical properties, although higher levels of substitution performed better than unmodified bitumen. The carbon black and iron powder were found to improve the capacitive and resistive properties of bitumen. Carbon black was found, however, to give the best predictability for in-service use for asphalt mixes with varying filler-to-bitumen ratios.
|Journal||Proceeding of the Institute of Civil Engineers - Transport|
|Publication status||Published - 1 Dec 2010|
Bibliographical noteReference text: Accorsi J and Bhatt S (2008) Novel Conductive Carbon Blacks for Electrostatic Discharge (ESD). Cabot Corporation, Boston, MA, USA.
Ahmedzade P and Geckil T (2007) Influence of carbon black on the mechanical and electrical properties of asphalt mixtures. Indian Journal of Engineering and Materials Sciences 14(5):358–364.
Airey GD, Mohammed MH and Fichter C (2008) Rheological characteristics of synthetic road binders. Fuel 87(10–11): 1763–1775.
Asi I and Assa’ad A (2005) Effect of Jordanian oil shale fly ash on asphalt mixes. Journal of Materials in Civil Engineering 17(5): 553–559.
BEDA (British Electrical Development Association) (1957) Induction and Dielectric Heating. King & Jarrett, London, UK.
BSI (British Standards Institution) (2000a) BS EN 1426: 2000 BS 2000–49: 2000 Methods of Tests for Petroleum and its Products. Bitumen and Bituminous Binders. Determination of Needle Penetration. BSI, Milton Keynes, UK.
BSI (British Standards Institution) (2000b) BS EN 1427: 2000 BS 2000–58: 2000 Methods of Tests for Petroleum and its Products. Bitumen and Bituminous Binders. Determination of Softening Point. Ring and Ball Method. BSI, Milton Keynes, UK.
BSI (British Standards Institution) (2005) BS 4987–1: 2005 Coated Macadam (Asphalt Concrete) for Roads and other Paved Areas – Part 1: Specification for Constituent Materials and for Mixtures. BSI, Milton Keynes, UK.
BSI (British Standards Institution) (1995) BS 7737–1: 1995 IEC 6037–1: 1973 Recommended Methods for the Determination of the Dielectric Properties of Insulating Materials at Frequencies above 300 MHz. General. BSI, Milton Keynes, UK.
Chaala A, Roy C and Ait-Kadi A (1996) Rheological properties of bitumen modified with pyrolytic carbon black. Fuel 75(13): 1575–1583.
Chebil S, Chaala A and Roy C (2000) Use of softwood bark charcoal as a modifier for road bitumen. Fuel 79(6): 671–683.
Cui L, Zhang Y, Zhang Y, Zhang X and Zhou W (2007) Electrical properties and conductive mechanisms of
immiscible polypropylene/Novolac blends filled with carbon black. European Polymer Journal 43(12): 5097–5106.
Gonzalez O, Munoz ME, Santamaria A, Garcia-Morales M, Navarro FJ and Partal P (2004) Rheology and stability of bitumen/EVA blends. European Polymer Journal 40(10): 2365–2372.
Grabowski W and Wilanowicz J (2008) The structure of mineral fillers and their stiffening properties in filler-bitumen mastics. Materials and Structures/Mate´riaux et Constructions 41(4): 793–804.
Jones PL (1985) Radio frequency assisted convective dryers [dielectric heating]. In IEE Colloquium on ‘Improving Industrial Energy Efficiency by Electrical Methods’ (Digest No. 46). Institution of Electrical Engineers, London, pp. 1–5.
Lesueur D and Little DN (1999) Effect of hydrated lime on rheology, fracture, and aging of bitumen. Transportation Research Record 1661: 93–100.
Matsuoka S and Wilson TL (1986) Encyclopedia of Polymer Science and Engineering. Wiley, Toronto, Ontario, Canada.
Nicholls FC, Bellin P, Catt C, Child S, Dussek I and Fabb T (1998) Asphalt Surfacings. E & FN Spon, London, UK.
Oikonomou N (2003) Repairing slurries based on a combination of cement-fly ash and bitumen emulsion. In Role of Concrete in Sustainable Development – International Symposium Celebrating Concrete: People and Practice, Dundee, 3–4 September. Thomas Telford, London, UK.
Petrie EM (2008) Methods for improving electrically and thermally conductive adhesives. Metal Finishes 106(3): 40–45.
Pound J (1973) Radio Frequency Heating in the Timber Industry. E & FN Spon, London, UK.
Saxena SC, Azmi M and Thiam TK (1984) Rice husk as a filler in bituminous mixes. Highways and Transportation 31(6): 16–21.
Singh B, Gupta M and Tarannum H (2003) Mastic of polymermodified bitumen and poly(vinyl chloride) wastes. Journal of Applied Polymer Science 90(5): 1347-1356.
Whiteoak D (1990) The Shell Bitumen Handbook. Shell Bitumen, Chertsey, UK.
Wu S, Mo L, Shui Z and Chen Z (2005) Investigation of the conductivity of asphalt concrete containing conductive fillers. Carbon 43(7): 1358–1363.
- roads & highways
- bitumen & tar
- materials technology