Print Email Facebook Twitter Investigation of the resilient behavior of granular base materials with simple test apparatus Title Investigation of the resilient behavior of granular base materials with simple test apparatus Author Araya, A.A. Huurman, M. Molenaar, A.A.A. Houben, L.J.M. Faculty Civil Engineering and Geosciences Department Structural Engineering Date 2012-12-31 Abstract In many developing countries, where resources are at premium, thin asphalt layers or chip seals are widely used to provide a durable all weather pavement surfacing. In such pavements the role of granular layers is very important in the general performance of the structure. Pavement designs in these countries are empirical in nature and rely on simple input parameters like California Bearing Ratio (CBR) values. Although widely applicable the traditional CBR test does not provide the mechanical properties such as resilient and permanent deformation characteristics of granular road materials. This paper documents the characterization technique developed to determine the mechanical behavior of granular (sub-) base materials based on CBR test using repeated load cycles. The confining pressure developed in the complex CBR stress state is estimated using strain gauges. Finite Element analysis has been attempted to model the repeated load CBR (RL-CBR) and derive an equivalent resilient modulus. Furthermore, a large scale cyclic load triaxial test was carried out on coarse unbound granular materials (UGMs) to validate the result of the RL-CBR. The RL-CBR test reasonably estimates the resilient modulus of UGMs which can be used as an input in mechanistic pavement design analysis in the absence of triaxial testing facilities To reference this document use: http://resolver.tudelft.nl/uuid:d7f58625-8628-442f-a246-8f86280704ce DOI doi:10.1617/sl 1527-011-9790-1 Publisher Springer-Verlag ISSN 1359-5997 Source http://link.springer.com/article/10.1617/s11527-011-9790-1 Source Materials and Structures 45(5)2012 Part of collection Institutional Repository Document type journal article Rights (c) 2012 Araya, A.A., Huurman, M., Molenaar, A.A.A., Houben, L.J.M, and Springer-Verlag Files PDF 287588.pdf 7.4 MB Close viewer /islandora/object/uuid:d7f58625-8628-442f-a246-8f86280704ce/datastream/OBJ/view