M. Tech. Civil Engineering / Black cotton soils are fertile and very good for agriculture, horticulture, sericulture and aquaculture. However, they are not good as road construction material because of their undesirable engineering properties and, therefore, need to be removed from site or modified to meet the minimum design standards required for roads subgrade material. This type of clay is very expansive and causes significant damages and problems on South African roads. Roads that are built on expansive clays are adversely affected by the behaviour of the expansive clay. Conventional methods of road design and construction over such material has proved to be very costly. It has been a practice in road construction to remove black cotton soil and replace with better quality soil. This results in high construction costs. The use of by-product and waste materials for modification and stabilization of engineering properties of expansive clays has environmental and economic benefits. On the other hand, problematic material may be treated in its natural state "in situ", thereby leading to reduction in cost. Thus, the modification of Black cotton soils using a mix proportion of fly ash and slagment may improve the engineering properties of the material. The overall objective of the study was to investigate and determine the appropriate mix proportion of fly ash and ground granulated blast furnace slag in the modification of engineering properties of black cotton soil for use in road construction.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:tut/oai:encore.tut.ac.za:d1001521 |
| Date | January 2014 |
| Creators | Maneli, Andile. |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format |
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