Granulated blast furnace slag is highly cement replacement and after drying and grinding to a fine powder, it can be used as a replacement for conventional cement.
GGBS is blended with cement at the concrete mixer and its major use is in ready-mixed concrete. Typically the replacement level is about 50%, but in some applications, GGBS can replace over 80% of the Portland cement. Concrete is well aware of the many benefits of GGBS (e.g. it increases the durability of concrete and greatly reduces its carbon footprint) .
Slag and cement are complementary. Slag cement is also an excellent alternative for the same amount of material. In the past construction projects, slag is put in quantity in cement. It can effectively improve cement properties, fill the gap between the cement particles, and thus improve the solidification quality. Therefore, the traditional pure cement construction way, cannot meet the future demand. The development of slag and cement mixing method will be the priority among building materials industry in future.