Dear Swar Shah;

This book will be very useful. It  introduces fly ash, rice husk ash, cement kiln dust, etc for partial replacement of cement.

http://www.springer.com/gp/book/9783540742937

Granulated blast furnace slag and fly ash can ecologically be best alternatives. There can be some advantages or disadvantages each other with regard to engineering properties, cost, ecology etc. So, best suit one should be selected from a regional perspective.

Granulated blast furnace slag and fly ash

Khabar nai ho

Dear Swar Shah;

This book will be very useful. It  introduces fly ash, rice husk ash, cement kiln dust, etc for partial replacement of cement.

http://www.springer.com/gp/book/9783540742937