Abstract
Strength and durability characteristics of granular and subgrade pavement materials have been shown to improve using polymer additives. Using such types of additives have shown to lower carbon footprints compared to traditional cementitious additives. This study reports the outcomes of a laboratory investigation to evaluate the use of a polymeric stabilization technique in improving engineering properties of pavement foundation materials. A synthetic polyacrylamide-based additive (PAM) has been used to stabilize three types of soils, commonly used in pavement construction. Repeated load triaxial tests were conducted to assess the stiffness and resistance to permanent deformation characteristics of PAM-treated soils. Simple capillary rise and abrasion tests have also been conducted to assess durability characteristics. The results revealed a significant overall increase in resilient modulus and a remarkable decrease in permanent deformation for the treated samples, depending on soil type. Further, the PAM used herein was shown to enhance the sealing capacity of the soils with the rise of water table, and dramatically improved the abrasion resistance for all the soils tested.
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The authors would like to acknowledge the logistic support of the Earthco projects company, particularly Mr Mark Holding for providing the stabilizer additive for this research.
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Georgees, R., Hassan, R., Evans, R. (2019). Durability Assessment of Pavement Foundation Materials Treated with a Polymeric-Based Additive. In: Sevi, A., Neves, J., Zhao, H. (eds) Enhancements in Applied Geomechanics, Mining, and Excavation Simulation and Analysis. GeoChina 2018. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-319-95645-9_7
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