I would firstly like to acknowledge Prof. Alexander for his time, guidance and for stimulating a curiosity in the field of cement and concrete technology which will certainly set me in good stead going into the future. Thanks are given to Prof. Moyo for making the necessary equipment available and for his time given in helping with the configuration. Special thanks are given to the PhD students Gladwell Nganga and Matongo Kabani for their time and help in accessing resources. I would also like to acknowledge the Structures Department of Stellenbosch University for allowing the loan of equipment at such short notice. Appreciation is also given to all the lab staff for all their assistance. Finally I would like to thank my family for providing me with the gift of an education.