TY  - JOUR
T1  - Effects of crumb rubber size and concentration on Marshall parameters of rubberized asphalt mixture
AU  - Almusawı, Ali
AU  - Abdulrahman, Hassan Shuaibu
AU  - Shakhan, Mohammad Razeq
AU  - Doğaroğlu, Bora
PY  - 2020
DA  - November
JF  - Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi
PB  - Pamukkale Üniversitesi
WT  - DergiPark
SN  - 2147-5881
SP  - 1048
EP  - 1052
VL  - 26
IS  - 6
LA  - en
AB  - The depletion of natural aggregate sources which generally accounts for a huge percent of Hot Mixed Asphalts (HMAs) and the difficulty posed by disposal scrap tires are a major environmental concern for the future. The use of waste products like scrap tires in highway construction is considered a sustainable way of dealing with these issues. Crumb rubber is a material pulverized from waste polymer products like scrap tires which are then added to HMAs to improve their performance. This study focuses on the sensitivity of crumb rubber particle sizes (fine ≤1.18 mm), (coarse ≥1.18 mm and ≤3.35 mm) (and mix of 50% fine and 50% coarse) and partial replacement (1.5 and 2.5% of total weight) of aggregates on the Marshall test parameters of rubberized asphalt mixes. The Marshall test parameters: density, stability, VTM, VFB of both rubberized asphalt and conventional asphalt samples were compared and also the Asphalt Institute (AI) and National Asphalt Pavement Association (NAPA) methods were used to obtain the optimum bitumen content (OBC). From the results, it suggests that; the utilization of dry process methodology of adding crumb rubber additives in different sizes and percentages had a considerable effect on Marshal test parameters and also influences the optimum binder content estimates. The results of this study can be used as a reference point for the use of crumb rubber in HMAs.
KW  - Crumb rubber
KW  - Marshall
KW  - Optimum bitumen content
KW  - Rubberized asphalt
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UR  - https://dergipark.org.tr/tr/pub/pajes/issue//825477
L1  - https://dergipark.org.tr/tr/download/article-file/1395518
ER  -