Oluwaseyi Lanre Oke

Structural Design and Modelling of Flexible Pavement Containing Cold Bituminous Emulsion Mixtures Oluwaseyi Lanre Oke

This book looks at the effect of cold bituminous emulsion mixtures containing recyclates when used as the road base on the performance of a flexible road pavement in terms of equivalent standard axel loads. The mechanistic-empirical method of flexible pavement design was used and modelling tools used were the KENLAYER, BISAR 3.0 and OLCRACK. The hypothetical examples presented showed that KENLAYER, though time consuming, may be better than BISAR 3.0 for analysing pavements containing CBEMs as road base layers since the materials are non linear in elastic response. When KENLAYER seemed not to be sensitive enough in analysing the pavements with thin surfacing layer thicknesses of 30mm for horizontal strains at the bottom of the surfacing layer, OLCRACK proved in this regard, though the stiffness values calculated in the KENLAYER had to be used. However, in order for OLCRACK to have better application in modelling pavements containing non linear elastic layers, experimental modification reflecting the non linearity of the CBEMs would have to be introduced to the software. OLCRACK is basically good for estimating fatigue lives to failure for linear elastic layers in multi-layer analysis of flexible pavements.