Hi Purchaser,
Good morning! How're you ?  
I'm from CNBM Group , a China state owned company, A world top 500 company, who is the largest producer of cement and building materials. 
We supply GGBS, SILICA FUME, Fly Ash for concrete.  
If you are intersetd in it, I'd like to send you ours catalogues and price by email soon.
Should you have any questions or new inquire, please kindly contact us at any time.
Looking forward to hearing from you.
best regards
Albert 
whatsapp: 008615901091526