Use of recycled waste in highway engineering

Increase generation of waste from human and construction activities with significantly increase number of global population becomes major issues over disposal space. The reuse of waste material is an important topic from the point of sustainability. Some types of waste such as tyre bales, construction and demolition materials, recycled glass and biosolids were studied to investigate the possibility for reuse in highway construction. It was found that tyre bales are useful for embankment stabilization especially on highly compressible soil, construction and demolition material such as brick and and recycled glass were found to be suitable for embankment and pavement base applications. Preliminary studies on biosolids indicate they are useful as embankment material provided which can be treated with suitable additives. This paper discussed the types of waste which are usable with or without treatment in highway engineering, their characteristics and their expected performance in their design life.