Show simple item record Sahu, B.K. Mathur, S. Kemsley, B. 2010-11-04T09:30:20Z 2010-11-04T09:30:20Z 2004
dc.identifier.citation Sahu, B.K. et al.(2004) Improvement of marginal materials by fly ash in road works, Botswana Journal of Technology, Vol.13, No.1, pp.7-12 en_US
dc.identifier.issn 10191 593
dc.description.abstract The national road network continues to play a fundamental and catalytic role in the promotion of social and economic development of Botswana. However, a combination of adverse climatic and geological factors, such as scarcity of conventional road building materials, near absence of a non saline surface water, and climatic extremes have dictated the need for innovative engineering approaches to highway design, construction and maintenance. In recent years application of fly ash has been considered in road construction with great interest. Fly ash is a pozzolanic material, which in the presence of water combines with lime to produce a cementetious material with excellent structural properties. Attempts have, therefore, been made at Botswana Roads Department in collaboration with University of Botswana to explore the feasibility of utilizing fly ash alone to improve the physical and strength characteristics of locally available non-standard marginal materials. The results indicate that with the addition of fly ash plasticity dereases while California Bearing Ration (CBR) increases for calcrete and other locally available marginal materials for road construction. With appropriate amount of fly ash and an adequate curing the material can be improved to meet the requirement of base and sub-base coarse. en_US
dc.language.iso en en_US
dc.publisher University of Botswana en_US
dc.subject Fly ash en_US
dc.subject Margin materials en_US
dc.subject Calcrete en_US
dc.subject Plasticity index en_US
dc.subject Road works en_US
dc.subject California bearing ration en_US
dc.title Improvement of marginal materials by fly ash road works en_US
dc.type Published Article en_US
dc.rights.holder University of Botswana en_US

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