Application of ground granulate blast furnace slag

Application of ground granulate blast furnace slag

For a making a roadThe major use of GGBSIn ready-mixed concrete, and it is utilised in a third of all UK ready-mix deliveries. Specifiers are well aware of the technical benefits, which GGBS imparts to concrete, including: -Stabilization of soil with cementations binders is widely used in road.-pavement and foundation construction, to improve the engineering properties of the soil.

Advantage of GGBS

increasing the strength and bearing capacitycontrolling the volume stability against swell-shrink caused by moisture changesincreasing the resistance to erosion, weathering and traffic loadingbetter workability, making placing and compaction easier lower early-age temperature rise, reducing the risk of thermal cracking in large pours elimination of the risk of damaging internal reactions such as ASR high resistance to chloride ingress, reducing the risk of reinforcement corrosion high resistance to attack by sulphate and other chemicalsconsiderable sustainability benefits

Disadvantage of GGBSHave lower early age strength. Because concrete made with GGBS goes through a 2nd-stage hydration process the initial reaction is slower.Concrete with a high percentage of GGBS used in a thin element in cold weather will have a lower strength and may require formwork to be in place longer.Again at higher percentages the initial carbonation rate may be a little higher, although this tends not be an issue as for standard cover the depth of carbonation typically doesn't impact on the reinforcing.High cost due to transportation and the supply of GGBS is unstable and unsteady.