Abstract
In South Africa and developing countries, the base or sub-base layer serves as the main structural element or bearing capacity of the pavement. As a result, more focus is placed on the base or sub-base layer for the accurate designing of the pavement structure. However, flexible pavement still experiences failures; these failures are generally caused by various factors such as soil expansion, inadequate soil stabilization, inappropriate use of materials in base courses and inadequacy in design. Consequently, the roads need regular maintenance and rehabilitation, which increases the operational cost of the roads. However, with an appropriate method of soil stabilization and the use of finite element-based software, the design and construction of flexible pavement can be enhanced. This paper attempts to validate the optimization of Cement-enhanced Class-F Fly ash usage, as the base layer stabilizer in the South African flexible pavement, using the ABAQUS model. The validation results are discussed in this paper.