A Portland cement mixed with a designated amount of ground granulated blast-furnace slag. The latent hydraulic property of the blast-furnace slag gives. Portland blast-furnace slag cement. UltraTech Premium. UltraTech Premium is a concrete special cement, produced in UltraTech's state-of-the-art manufacturing. Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) to suitable fineness and is used to replace a portion of portland cement.
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The relevant code to be followed to understand the guidelines of using this cement is: Its initial setting time is 1 hr and final setting is 10 hrs.
Instances of chloride attack occur in reinforced concrete in marine environments and in road bridges where the concrete is exposed to splashing portland blast furnace cement road deicing salts.
In most projects BFC is now specified in structural concrete for bridge piers and abutments for protection against chloride attack.
Once the slag has been cooled and ground to a usable fineness it is stored and shipped to suppliers throughout the united states. Slag cement is commonly found in ready-mixed concrete, precast concrete, masonry, soil cement and high temperature resistant building products.
Peak concrete temperatures portland blast furnace cement reduced.
This is an advantage when thermal cracking would be a problem. Solutions of naturally occuring sulphates of sodium, potassium, calcium or magnesium, as may be present in some portland blast furnace cement and groundwaters, can cause expansion and disruption of concrete due to their reaction with C3A content in the cement.
Concrete made with blast furnace slag cement had a lower content of cement thus the C3A content present is low.
Our field practice confirms that PBFC also processes better slump retention.