Mechanical Behavior of Plastic Roller-Compacted Concrete

on August 19, 2024

Syed Faizan HusainGreat Northern

AUTHORS: Husain, S.F.; Wiggins, J.R.; ,Ouellet, J.; Tutumluer, E.; and Roesler, J.R.

ABSTRACT: Roller-compacted concrete (RCC) pavement technology allows for faster construction and opening to vehicle traffic compared to conventional concrete pavement. However, there has been limited characterization of the mechanical response of plastic RCC materials for pavements. This study investigated the resilient response, permanent deformation behavior, and shear strength characteristics of a typical plastic RCC mixture. Resilient modulus testing was performed to analyze the resilient response of plastic RCC over time and under various stress states. Secondly, a permanent deformation test was conducted to determine the magnitude of permanent strain accumulation prior to setting. Finally,
variable energy dynamic cone penetrometer (VE-DCP) soundings were conducted to determine the shear strength properties of plastic RCC. The results demonstrated that the initial resilient modulus of plastic RCC remained lower than that of a wellcompacted unbound aggregate base (UAB) material of similar geologic origin. The resilient modulus for plastic RCC was low for the first 50 minutes and then increased rapidly to exceed UAB modulus after several hours. The permanent strain of plastic RCC showed similar trends to that of aggregate material and within acceptable limits. As expected, the RCC mix resistance to penetration progressively increased over time, with a significant gain in cone tip resistance during the first hour of testing. For this compacted RCC mix, the correlated CBR was initially 20 and increased to 60 after 250 minutes.

Syed Faizan Husain (pronounced Suh-Yud Phae-zaan Who-Sen) is a Ph.D. student in Transportation Engineering at the University of Illinois Urbana-Champaign, working under the guidance of Professor Erol Tutumluer (pronounced Ae-Rul Tu-Tam-Luer). His doctoral research focuses on developing data-driven design guidelines for geosynthetic-stabilized aggregate base layers in highway pavements. Syed leads an INDOT-funded research project, where he uses state-of-the-art bender element field sensors and in-situ repeated load testing to directly measure the mechanically stabilized layer near geogrid installed in aggregate base layers during the US-20 reconstruction in Elkhart County, IN. Previously, as a graduate student at the University of Cincinnati, Syed contributed to the development of state-wide guidelines for the Indirect Tensile Asphalt Cracking Test (IDEAL-CT) for asphalt mixtures for Ohio DOT, providing a rapid lab alternative to assess cracking resistance. Originally from Aligarh (pronounced Uh-Lee-Gar), India, Syed enjoys spending time with his family and hiking whenever possible.

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