Effect of Particle Size on Mechanical Properties and Wear Behaviour of Brake Lining Produced from Waste Material: Sawdust

Stephen JT, Oladokun TO, Adebayo A, Adeyemi GJ and Abere JO

Published on: 2019-08-14


Development of asbestos-free brake lining using with sawdust was investigated in a view of replacing the use of asbestos whose dust is carcinogenic. The sawdust from hardwood (mahogany and iroko trees) with other components such as abrasive, reinforce, lubricant, were sieved into the grade of 100 µm and 250 µm during the production of brake linings. The percentages of sawdust for the samples are 40, 45, 50, 55, and 60. The percentages of abrasives (silicon carbides) were 27, 22, 17, 12 and 7, while binder (resins) lubricant (steel dust) and carbon black (reinforce) were constant at 13%, 15%, and 5% respectively on each sample. The molding pressure load of 80 Mg was used during the compression process. The brake lining properties examined are morphology, hardness, compressive strength, density, wear rate, porosity and ash content. Also, the effects of sieve size on mechanical properties and morphology were evaluated. The results obtained show that the finer the sieve size and the higher the molding pressure, the better the mechanical, physical and wear properties. Furthermore, the brake linings based on sawdust were then compared with commercial (asbestos-based) brake lining and the results are in close agreement. Hence, sawdust can be effectively used as a filler for the replacement of asbestos in brake linings.