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Browsing by Author "Leyland, RC"

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Development of the road aggregate test specifications for the modified ethylene glycol durability index for basic crystalline materials

Author: Leyland, RC ; Paige-Green, P ; Momayez, M Date: Sep 2013 Many basic igneous rocks contain smectite clays as a result of deuteric alteration during their formation or subsequent chemical decomposition. This has resulted in numerous failures when such materials are used in road construction, due to ... Read more
The identification and treatment of poor durability Karoo dolerite base course aggregate – evidence from case studies

Author: Leyland, RC ; Momayez, M ; Van Rooy, JL Date: Mar 2016 The Karoo Supergroup covers approximately 57% of South Africa’s surface area and the sedimentary rocks therein generally do not yield acceptable pavement aggregates. The Karoo Dolerite Suite (intrusions) present in these sedimentary units ... Read more
Smectite clay identification and quantification as an indicator of basic igneous rock durability

Author: Leyland, RC ; Verryn, S ; Momayez, M Date: Sep 2014 In terms of aerial extent, basic igneous rocks are one of the most used road building materials in South Africa. This is mainly due to the fact that approximately 57% of the surface lithology in South Africa is of poor road construction ... Read more

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Browsing by Author "Leyland, RC"

Browsing by Author "Leyland, RC"

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