This paper describes the in-situ subgrade stabilisation and pavement recycling processes, the different types of binding agents and their application. The key to subgrade stabilisation is the re-use of the existing soils, elimination of spoil sites, reduction of new aggregate and thus reduction of transportation. Similarly, in-situ pavement recycling utilises the materials in the existing base course, thereby converting the country’s road network into a series of linear quarries. Finally, the benefits of soil modification and base course stabilisation are highlighted in terms of new aggregate quantities and their transportation requirements, which ultimately equates to cost savings and sustainability of New Zealand’s natural resources. (a) For the covering entry of this conference, please see ITRD abstract no. E212706.
Abstract