This book is an attempt to consolidate the published research related to the use of Supplementary Cementing Materials in cement and concrete. It comprises of five chapters. Each chapter is devoted to a particular supplementingcementing material. It is based on the literature/research findings published injournals/conference proceeding, etc. Topics covered in the book are; coal fly ash, silica fume(SF), granulated blast furnace slag (GGBS), metakaolin (MK), and rice husk ash (RHA).Each chapter contains introduction, properties of the waste material/by-product, its potentialusage, and its effect on the properties of fresh and hardened concrete and other cement basedmaterials.