Manjit Singh [1948 to 2014] completed his PhD in Chemistry over three decades ago with a thesis on the use of Phosphogypsum in Building Materials and followed through on his talent with a career at Central Building Research Institute. He had practical experience in Africa, Europe, and Asia under his belt with his work on Phosphogypsum recognised all over the world. Moreover, his work has been cited by international authors a countless number of times and his research papers have received many awards with the crème de la crème being the NRDC Award. He retired as a 'G' level scientist from CBRI in 2008. Furthermore, he has been a member of the Materials Research Society of India, Indian Science Congress, Indian Building Congress, Indian Concrete Institute and member of several BIS Code Committees related to gypsum, lime, and cement. Following the completion of this book, Dr Manjit Singh unfortunately passed away on 6-5-2014.