Pengembangan Model Korelasi antara Modulus Resilien dengan Modulus Dinamis untuk Campuran Stone Matrix Asphalt
DOI:
https://doi.org/10.5614/jts.2014.21.2.8Keywords:
Modulus resilien, Modulus dinamis, Asbuton, Stone Matrix Asphalt.Abstract
Abstrak. Parameter yang berhubungan dengan sifat mekanistik bahan, seperti modulus kekakuan sangat diperlukan baik untuk perencanaan tebal lapisan perkerasan jalan maupun untuk mengevaluasi kinerja campuran beraspal. Mengingat campuran beraspal merupakan material yang tidak bersifat elastis sempurna maka pemakaian istilah modulus elastis kurang tepat digunakan. Sebagai gantinya digunakan beberapa istilah seperti modulus resilien dan modulus dinamis. Tujuan dari penelitian ini adalah mengembangkan korelasi antara dua parameter modulus campuran beraspal tersebut, khususnya pada campuran SMA (Stone Matrix Asphalt). SMA yang digunakan dibedakan menjadi dua, yaitu dengan serat selulosa sebagai bahan penstabil dan dengan asbuton butir sebagai bahan penstabil. Berdasarkan hasil pengujian pengaliran aspal (draindown) terlihat asbotun butir dapat berfungsi sebagai penstabil SMA. Nilai modulus resilien dan modulus dinamis SMA akan berkurang apabila temperatur pengujian bertambah. Sementara dengan turunnya frekwensi pembebanan maka nilai modulus resilien dan modulus dinamis akan menurun juga. Korelasi antara modulus dinamis dengan modulus resilien pada kondisi frekwensi pembebanan dan temperatur yang sama cukup baik dengan R2 = 0,97 dimana nilai modulus dinamis sekitar 0,9 dari nilai modulus resilien.Abstract. Parameters that are related to the mechanistic properties of material, such as the modulus is an important factor both for thick layers design and for pavement performance evaluation. It is well known that most paving materials are not elastic but experience some permanent deformation after each load application and term of elastic modulus inappropriate to use. Another alternative that can be used is the terms such as dynamic modulus and resilient modulus. The purpose of this research is to develop a correlation between the two modulus parameters, especially for the SMA mix (Stone Matrix Asphalt). SMA is used can be divided into two, i.e. with cellulose fibers as a stabilizer and with granular asbuton as stabilizer. Based on the results of the draindown asphalt testing, granular asbotun can serve as a stabilizer. The value of dynamic and resilient modulus will be reduced when the temperature testing increased. While the decrease of loading frequencies will be reduced the value of dynamic and resilient modulus. Correlation between the dynamic modulus and the resilient modulus quite well with R2 = 0.97 on the same conditions of temperature and loading frequency, where the dynamic modulus value about 0.9 the resilient modulus value.
References
Affandi, F., 2012, The Performance of Bituminous Mixes Using Indonesia Natural Asphalt, Perth, Australia: Proceeding of 25th ARRB Conference.
Blazejowski, K., 2011, Stone Matrix Asphalt Theory and Practice, http://www.crcpress.com, Download (diturunkan/diunduh) pada 5 Desember 2012.
Bonaquist, R., Christensen, D.W., 2005, A Practical Procedure for Developing Dynamic Modulus Master Curve for Pavement Structural Design, Washington DC: 84th Annual Meeting of the
Transportation Research Board, Paper No. 05-0389.
Brown, E.R., Mallick, Haddock, J., Bukowski, J., 1997, Performance of Stone Matrix Asphalt (SMA) in The United States, NCAT Report No. 97-1, Alabama: National Center for Asphalt Technology, Auburn University.
Christensen, D.W., Pellinen, T.K., Bonaquist, R.F. 2003, Hirsch Model for Estimating the Modulus of Asphalt Concrete, Journal of the Association of Asphalt Paving Technologies, Volume 72, Lexington
Huang Y.H., 2004, Pavement Analysis and Design, New Jersey, USA: Prentice Hall, Second Edition.
Pellinen, T.K., Witczak, M.W., 2002, Stress Dependent Master Curve Construction for Dynamic Modulus, Journal of the Association of Asphalt Paving Technologies, Vo. 71.
Shell, 2003, The Shell Bitumen Handbook (fifth edition), Shell, UK National.
Yoder, E.J., Witczak, M.W., 1975, Principles of Pavement Design, J. Wiley and Sons, Inc, second edition.