{"title":"Hydraulic Conductivity Prediction of Cement Stabilized Pavement Base Incorporating Recycled Plastics and Recycled Aggregates","authors":"Md. Shams Razi Shopnil, Tanvir Imtiaz, Sabrina Mahjabin, Md. Sahadat Hossain","volume":198,"journal":"International Journal of Structural and Construction Engineering","pagesStart":260,"pagesEnd":265,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10013128","abstract":"<p>Saturated hydraulic conductivity is one of the most significant attributes of pavement base course. Determination of hydraulic conductivity is a routine procedure for regular aggregate base courses. However, in many cases, a cement-stabilized base course is used with compromised drainage ability. Traditional hydraulic conductivity testing procedure is a readily available option which leads to two consequential drawbacks, i.e., the time required for the specimen to be saturated and extruding the sample after completion of the laboratory test. To overcome these complications, this study aims at formulating an empirical approach to predicting hydraulic conductivity based on Unconfined Compressive Strength test results. To do so, this study comprises two separate experiments (Constant Head Permeability test and Unconfined Compressive Strength test) conducted concurrently on a specimen having the same physical credentials. Data obtained from the two experiments were then used to devise a correlation between hydraulic conductivity and unconfined compressive strength. This correlation in the form of a polynomial equation helps to predict the hydraulic conductivity of cement-treated pavement base course, bypassing the cumbrous process of traditional permeability and less commonly used horizontal permeability tests. The correlation was further corroborated by a different set of data, and it has been found that the derived polynomial equation is deemed to be a viable tool to predict hydraulic conductivity. <\/p>","references":"[1]\tSanger M., Natarajan B.M., Wang B., Edil T., Ginder-Vogel M. (2020), \u201cRecycled concrete aggregate in base course applications: Review of field and laboratory investigations of leachate pH,\u201d Journal of Hazardous Materials, Volume 385. \r\n[2]\tCopeland, A. (2011), \u201cReclaimed asphalt pavement in asphalt mixtures: State of the practice,\u201d Technical report, TRID.\r\n[3]\tImtiaz, T. (2021), \u201cReusing of Recycled Plastic as Pavement Base and Sub-base Materials\u201d, PhD dissertation, The University of Texas at Arlington.\r\n[4]\tSnyder, M. B. (2016), \u201cConcrete Pavement Recycling and the Use of Recycled Concrete Aggregate in Concrete Paving Mixtures,\u201d CP Road MAP Brief March 2016. 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