SugarCrete — Bagasse Building Blocks

The ask

Low-carbon structural blocks made from sugarcane bagasse, replacing concrete block in low-rise construction.

Why now

Cement is around 8% of global CO₂. SugarCrete-type bagasse blocks have demonstrated 4–5× lower embodied carbon, lighter weight, and competitive cost for non- and semi-structural use — and the method is being shared open-access.

Why Bangladesh

Bangladesh's state sugar mills are chronically loss-making and sit on idle bagasse. A bagasse-block line gives a mill a second product and a region a cheaper block.

As a business

Co-locate with a sugar mill, adapt the method, and sell blocks regionally. The mill's bagasse handling already exists — so the capex is mostly the block-forming line.

Economics

Move the sliders to model a block line. Defaults are order-of-magnitude estimates — a founder validates them.

Market. Bangladesh consumes ~33 million tonnes of cement a year (৳480–535 a bag, 85%+ of clinker imported). Bagasse blocks ride the concrete-block segment underneath that — and demand grows with every new urban mid-rise.

What ZEPH would back

A founder who can lock a mill bagasse-supply deal and prove the block in real walls.

Watch the source reel

Impact

Sugarcrete-type bagasse blocks have 15–20% of the embodied carbon of traditional concrete blocks (≈0.04 kg CO₂e/kg vs ≈0.25 kg CO₂e/kg). At 1,500 blocks/day × 280 days, a single line avoids roughly 700 tCO₂e/yr compared to the concrete block baseline. Bangladesh imports over 85% of its cement clinker; bagasse blocks displace a portion of that demand — each tonne of bagasse used keeps approximately US$35 of clinker out of the import bill. Co-locating with state sugar mills converts a disposal cost (bagasse handling) into a revenue stream, strengthening the overall economics of chronically loss-making mills.