Estimation of Permanent Deformation and Resilient Modulus of Crushed Recycled Pavement Materials Containing Crumb Rubber and Crushed Glass Using the Dynamic Lightweight Cone Penetration and Clegg Impact Hammer Tests

Abstract

The permanent deformation and resilient modulus tests are the most reliable tests that control the performance of pavement materials under dynamic wheel loads; however, the tests procedures are very time-consuming, complicated, and expensive. Therefore, estimation of the properties using other simple-procedure dynamic properties is necessary. This study firstly provides very new experimental results of construction and building (C&D) materials (i.e. recycled concrete aggregate (RCA) and crushed rock (CR)) together with crumb rubber and broken glass based on four different dynamic tests (i.e. permanent deformation, resilient modulus, Clegg impact hammer, and dynamic lightweight cone penetration tests). Then, phenomenological estimations are applied for estimation of the permanent deformation and resilient modulus based on the two other dynamic test results. According to the phenomenological models, the coefficients of determination, R2, varied from 0.80 to 0.91. Thus, the results indicated that strong correlations existed between the test results and the model. Therefore, the CIV and DLPI can be used to find acceptable estimates of permanent deformation and resilient modulus of the unbound granular base and subbase materials together with crumb rubber and crushed glass for pavement applications.