1. South African National Roads Agency Limited, Chapter 2: Pavement Composition and Behaviour, in: South African Pavement Engineering Manual (SAPEM): Republic of South Africa, 2013, pp. 1–47.
2. Global land transport infrastructure requirements – estimating road and railway infrastructure capacity and costs to 2050;Dulac;International Energy Agency,2013
3. The significance of iron and steel slag as by-product for utilization in road construction;Sofilić,2012
4. Properties and uses of iron and steel slags;Lewis,1992
5. National Slag Association. Slag in History. 06/08/2015]; Available from: http://www.nationalslag.org/slag-history.