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Magnesium Chloride Safe for Concrete

recent study at Purdue University has indicated that magnesium chloride is less destructive to Type 1 concrete than calcium chloride. Both the mass change and relative dynamic modulus of elasticity (RDME) were better for MgCl2 than for CaCl2 for both wet/dry and freeze/thaw cycles.

Type 1 and Fly ash specimens after 166 Freeze/Thaw cycles

Concrete after 166 F/T cycles with 15% magnesium chloride Concrete after 166 F/T cycles with 17% calcium chloride
15% Magnesium chloride 17% Calcium chloride

Concrete Spalling Comparison

Average Cumulative Weight of Scaled Concrete Removed

Less spalling with magnesium chloride


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Additional studies:

Western Transportation Institute Concrete Report 
Air Quality Sweeper Testing