2022 年 14 巻 p. 1692-1711
This study was aimed to investigate the effects of polyethylene terephthalate fiber (PET) and carbonized wood particles (CWPs) in hot mix asphalt (HMA). First, an experimental study was conducted using 240 Marshall specimens to determine the Marshall properties and retained Marshall stability. To measure properties and optimize the materials, predictive models were developed and validated using nonlinear regression with response surface analysis. According to the models, CWPs content had a higher influence on bulk specific gravity, while PET played a higher significant role in Marshall stability in both conditioned and unconditioned stages. However, CWPs and asphalt contents were found to be the dominating factors on Marshall flow of modified HMA. Optimum binder contents of modified HMAs were significantly varied from 4.9% to 5.2% as PET and CWPs content increased. The maximum replacement rates of fine aggregate with CWPs and PET contents in HMA were found as 18% and 10% respectively.
