The Secret to Super Strong Concrete Is... Bacteria?

The video explores the potential of bacteria to revolutionize concrete by enabling it to self-repair. Concrete, a widely used material, faces issues like cracking and environmental impact due to cement production. Scientists have discovered bacteria that can survive in concrete's alkaline environment and excrete calcite to fill cracks. This self-healing concrete can restore over 90% of its strength but is currently expensive. Future research aims to reduce costs and expand its use in challenging environments.

What is the primary environmental concern associated with concrete production?

• It depletes natural sand resources.

• It leads to deforestation.

• It consumes a lot of water.

• It contributes significantly to carbon dioxide emissions.

Why are certain bacteria considered suitable for use in concrete?

• They can survive in acidic environments.

• They excrete a mineral that is a component of concrete.

• They consume harmful pollutants.

• They are resistant to high temperatures.

How do bacteria in self-healing concrete become active?

• They are awakened when water seeps into cracks.

• They are activated by heat.

• They are triggered by sound vibrations.

• They are activated by sunlight.

What is a current limitation of self-healing concrete?

• It weakens the overall structure.

• It is too expensive for widespread use.

• It is not effective in cold climates.

• It requires frequent maintenance.

What is one proposed method to reduce the cost of self-healing concrete?

• Using cheaper bacteria strains.

• Replacing calcium lactate with a sugary food.

• Reducing the amount of concrete used.

• Increasing the amount of bacteria used.