The Use of Waste Materials from RAP and FGD Gypsum to Compensatory the Pavement Material

DOI: 10.14416/


  • Chalermphol Chaikaew Department of Civil Engineering, Rajamangala University of Technology Rattanakosin
  • Patchareeya Chaikaew Department of Civil Engineering, Rajamangala University of Technology Rattanakosin
  • Warun Na Songkhla Department of Civil Engineering and Architecture, Rajamangala University of Technology Suvarnabhumi


Reclaimed asphalt pavement (RAP), Flue gas desulfurization (FGD Gypsum), CBR Testing


This research aims to study the appropriate properties and ratios of reclaimed asphalt pavement (RAP) to synthetic gypsum or flue gas desulfurization (FGD Gypsum) that affects the california bearing ratio (CBR) to replace the natural pavement material. Determining the proportion of test samples RAP per FGD gypsum in mixed proportions 100:0, 90:10, 80:20, 70:30, 60:40 and 50:50 using the amount of water at the maximum dry density. The laboratory tests, conducted to determine engineering properties of RPA and FGD Gypsum used as preliminary factors in pavement material selection, california bearing ratio test and dry density test. Based on the test results showed that when replaced with FGD gypsum in the amount of 30 percent (70:30), the maximum california bearing ratio, equivalent to crushed rock soil aggregate type base. Tests showed that the CBR value relates directly to the maximum dry density and swelling increased with increasing of FGD gypsum, but stay in the standard embankment material.


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บทความวิจัย (Research article)