concrete mix design

Why Does Silica Fume Change the Color of Concrete? (And How to Control It)

Why Does Silica Fume Change the Color of Concrete? (And How to Control It)

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When a high-profile bridge deck or architectural precast panel arrives on site with uneven blue-grey mottling instead of the specified uniform tone, the immediate cost is a rejected batch, a delayed pour cycle, and forensic testing bills that can exceed $15,000 per incident. Architects and structural engineers spec silica fume for its unmatched strength and […]

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How to Prevent Plastic Shrinkage Cracking in Silica Fume Concrete

How to Prevent Plastic Shrinkage Cracking in Silica Fume Concrete

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Plastic shrinkage cracking in silica fume concrete can cut a slab’s service life by 30% or more before curing even begins. When bleed water evaporates faster than it rises, capillary tension builds in the near-surface paste – and at w/b ratios below 0.40, silica fume’s extreme fineness virtually eliminates bleeding. Engineers specifying high-performance concrete (HPC)

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