Polishing Machine Based on High-Pressure Water Jet

The design of high pressure water jet based polishing equipment and its fabrication conducted in this study is reported herein, together with some preliminary test results for assessing its applicability for HMA surface polishing. This study also provides preliminary findings concerning the test variables, such as the rotational speed, the water jet pressure, the abrasive agent used, and the impact angel that were experimentally investigated in this study. The preliminary findings based on four trial tests (two on large slab specimens and two on small size gyratory compacted specimens), however, indicate that both friction and texture values tend to increase with the polishing durations for two combinations of pressure and rotation speed of the rotary deck. It seems that the more polishing action the specimen is subjected to; the aggregate edges are created such that the surface texture values are increased with the accompanied increase in friction values. It may be of interest (but which is outside the scope of this study) to investigate if the similar trend exist for HMA prepared with aggregate source that is sand and gravel.

Authors:

• Mohammad A. Khasawneh

Keywords:

• High-pressure
• water jet
• Friction
• Texture
• Polishing
• Statistical Analysis.

References:

[1] G. Delalande, “Résistance des granulats au polissage – Méthode d’essai
par projection” Bulletin de Liaison des LPC, 1992, 177, pp. 73-80.
[2] M. T. Do, V. Ledee, and D. Hardy, “Tire/Road Friction – Assessment of
the Polishing of Road Aggregates” LCPC, Route de Bouaye, BP 4129,
44341 Bouguenais, FRANCE, 2001; e-mail: [email protected].
[3] R. Yaron, and S. Nesichi, “Alleviating the Skid Resistance Problem –
The Israeli Experience” Aram Engineers, Haifa Israel, Public Works
Department, Israel, 2007.
[4] J. Waters, and B. Pidwerbesky, “Resurfacing Roads Using Ultra
Highpressure Watercutting” 22nd ARRB Conference – Research into
Practice, Canberra, Australia, 2006.
[5] J. Waters, “Ultra Highpressure Watercutting – Rejuvenating the
Microtexture of Polished Surfaces” Fulton Hogan Limited, Christchurch,
New Zealand, 2007.
[6] P. D. Cenek, N. J. Jamieson, N. J. Locke, and P. F. Stewart, “Selection
of Cost Effective Skid Resistance Restoration Treatments” Transfund
New Zealand Report, 1998, No. 141. 62pp.
[7] P. D. Pidwerbesky, “FH UHP Watercutter” Internal Report Distributed
Fulton Hogan Roadshow, 2002.
[8] P. G. Roe, and S. A. Hartshone, “Mechanical Retexturing of Roads: A
Study of Processes and Early-Life Performance” Transport Research
Laboratory Report, No. 298, 1997.
[9] American Society for Testing and Materials “Measuring Pavement
Surface Frictional Properties Using the Dynamic Friction Tester”,
ASMT Standard Test Method E 1911-98 (2002), Book of ASTM
Standards, Volume 04.03, Philadelphia, PA, 2005. [10] American Society for Testing and Materials “Standard Test Method for
Measuring Pavement Macrotexture Properties Using the Circular Track
Meter”, ASTM Standard Test Method E-2157-01, Book of ASTM
Standards, Volume 04.03, Philadelphia, PA, 2005.
[11] American Society for Testing and Materials “Measuring Surface
Friction Properties Using the British Pendulum Tester” ASTM Standard
Test Method E-303-93 (2003), Book of ASTM Standards, Volume
04.03, Philadelphia, PA, 2005.
[12] American Society for Testing and Materials “Measuring Pavement
Macrotexture Depth Using a Volumetric Technique” ASTM Standard
Test Method E-965-96(2001), Book of ASTM Standards, Volume 04.03,
Philadelphia, PA, 2005.