Evaluation of rice husk ash as filler in hot mix asphalt concrete

• Published in: Construction & building materials Vol. 48; pp. 390 - 397
• Main Authors: Sargın, Şebnem, Saltan, Mehmet, Morova, Nihat, Serin, Sercan, Terzi, Serdal
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.11.2013
• Subjects: Asphalt concrete; Asphalt mixture; Flexible pavement; Hot mix asphalt; Rice husk ash; Rice husk ash; Flexible pavement; Asphalt mixture; Hot mix asphalt; Asphalt concrete
• ISSN: 0950-0618
• DOI: 10.1016/j.conbuildmat.2013.06.029

•In this study, the usability of rice husk ash was investigated in hot mix asphalt concrete as mineral filler.•Optimum bitumen content was determined as 4.73% for 5.0% limestone mineral filler rate.•Best Marshall Stability was obtained from 50% rice husk ash and 50% limestone of filler rate mixtures. In the study, it was investigated to use the rice husk ash (RHA) in the hot mix asphalt as mineral filler. For this purpose, four different serial asphalt concrete samples were produced using limestone (LS) in different proportions (4%, 5%, 6%, and 7%) as mineral filler. The amount of optimum bitumen and the value of Marshall Stability (MS) were determined with MS test for the samples. Choosing the series of asphalt having 5% filler which has given the highest stability RHA was changed with LS filler in the rate of 25%, 50%, 75%, and 100%. After that MS test was conducted on the produced samples and the results were evaluated. As a result, it has come in view that RHA can be used as mineral filler in the asphalt concrete.