Don't Put Wet Rocks In A Campfire

The video explores the phenomenon of spalling, where concrete and rocks can explode when exposed to high heat. The presenter conducts experiments with different concrete mixes and tests rocks in campfires to understand the conditions that lead to explosions. The video also demonstrates the effects of pouring molten aluminum on concrete and discusses the science behind these reactions. The presenter creates a DIY spalling concrete mix to test its explosive potential, highlighting the importance of understanding material properties and safety precautions.

What is the main danger associated with molten aluminum spilling onto concrete?

• It can cause the concrete to melt.

• It can cause the concrete to explode.

• It can cause the concrete to evaporate.

• It can cause the concrete to freeze.

What phenomenon is being tested with molten aluminum and concrete?

• Evaporation

• Spalling

• Freezing

• Melting

What was the result of mixing Orbys into the concrete?

• The concrete became stronger.

• The concrete split apart.

• The concrete turned into sand.

• The concrete melted.

Why are wet rocks potentially more dangerous than dry rocks in a campfire?

• Wet rocks are colder.

• Wet rocks are heavier.

• Wet rocks can create steam pressure.

• Wet rocks are more flammable.

What was the purpose of soaking rocks in water before testing them in a campfire?

• To test steam pressure effects

• To change their color

• To clean them

• To make them heavier

What is one reason concrete can explode in a fire?

• The water inside turns to steam.

• The concrete absorbs too much light.

• The concrete becomes magnetic.

• The concrete turns into liquid.

What was the effect of adding rebar to the concrete mix?

• It protected the concrete by distributing heat.

• It made the concrete waterproof.

• It caused the concrete to explode immediately.

• It made the concrete softer.

What was added to the DIY super spalling concrete mix to increase pressure?

• Sand

• Diatomaceous earth

• Clay

• Salt

What was the result of pouring molten aluminum on the driveway?

• The driveway melted.

• The aluminum evaporated.

• The aluminum solidified quickly.

• The driveway exploded.

What was the unexpected result of the DIY super spalling concrete test?

• The concrete became transparent.

• The concrete turned into dust.

• The concrete exploded like a shaped charge.

• The concrete melted.