Cement: A Really Hard Problem

Cement production significantly contributes to global CO2 emissions, accounting for 8% of total emissions. The process of making clinker, a key component of cement, releases a large amount of CO2. While concrete can absorb some CO2 over time, it is insufficient to offset emissions. Efforts to reduce cement's carbon footprint include using alternative energy sources, reducing clinker content, and incorporating industrial waste. Innovative companies like Solidia are developing new methods to use CO2 in cement production, making it more efficient and environmentally friendly. However, the cement industry is resistant to change, and new technologies must prove commercially viable to be adopted.

What percentage of global emissions is attributed to the cement industry?

• 16%

• 8%

• 4%

• 12%

What is the main chemical component in limestone that contributes to CO2 emissions during cement production?

• Calcium oxide

• Silicon dioxide

• Gypsum

• Calcium carbonate

How much CO2 is released per kilogram of clinker produced?

• 2 kg

• 1.5 kg

• 1 kg

• 0.5 kg

Which of the following is a byproduct that can be used to reduce clinker in cement production?

• Fly ash

• Silicon dioxide

• Calcium oxide

• Gypsum

What is the unique aspect of Solidia's cement curing process?

• It uses water

• It uses carbon dioxide

• It uses nitrogen

• It uses oxygen

What is a major barrier to the adoption of new cement technologies?

• High cost of production

• Lack of raw materials

• Insufficient demand

• Resistance to change in the industry

What must green cement prove to be in order to gain acceptance in the industry?

• Environmentally friendly

• Commercially viable

• Easier to produce

• More durable