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The reason why precast concrete is so hard to decarbonize

Why fast production cycles keep cement content high in precast — and what changes when early strength comes from ultrasound instead.

Increasing early compressive strength by factor 4 to produce more?

Lab results: sonicated concrete reaches 21.3 MPa after 8 hours — 4 times the reference — so moulds can turn over twice a day.

Reducing the carbon footprint of the concrete production is a complex task that many have failed to achieve so far. What makes it so difficult though?

Concrete looks simple: sand, cement, water. 27 cement types, plant-specific recipes and building standards make cutting its CO₂ anything but.

How about workability of the concrete?

Faster hardening risks concrete stiffening before it reaches the moulds. How tuning the treatment keeps it open for 30 to 90 minutes.