Making cement
Facts checked 1 Nov 2026
The warehouse's last ingredient is Cement, and it's the quickest to make: heat your Calcite into Quicklime in a refinery, then mix it with water in a factory.
Step 1: Calcite into Quicklime
Calcite Calcination, in a refinery, turns every 100 kg of Calcite into 56 kg of Quicklime and 44 kg of Carbon Dioxide. Choose Quicklime as the primary output.
- In: About 270 tonnes of Calcite.
- Out: About 150 tonnes of Quicklime, plus some Carbon Dioxide.
- Time: About 20 minutes.
Step 2: Quicklime into Cement
Cement Mixing, in a factory, turns every 3 kg of Quicklime and 5 kg of Deionized Water into 8 kg of Cement.
- In: About 150 tonnes of Quicklime and 250 tonnes of Deionized Water, kept from Water, salts, and calcium.
- Out: 400 tonnes of Cement.
- Time: About 25 minutes.
Use Cement Mixing in a factory, not Salty Cement Mixing in a refinery. That one uses plain Water and makes less Cement from the same Quicklime.
Make your cement
- On an Academy refinery, click Refine Materials, choose Calcite Calcination with your crew's warehouse, make Quicklime the primary output, and Lease & Begin. Click Finish when it's done.
- On an Academy factory, click Manufacture Goods, choose Cement Mixing with your crew's warehouse, set 400 tonnes, and Lease & Begin. Click Finish when it's done.