The Deadliest Fire Pit Material?

Summary by Krater

The host tests whether rocks and concrete fire pits explode or crack under extreme heat using a propane torch and thermal imaging, concluding that while rocks and concrete do not explosively shatter like canned food, they do crack and spall from thermal stress over time.

From the video

Answers: Do concrete and rocks explode in a fire pit?

• rock explosion test in fire pit
• concrete fire pit heat testing
• thermal imaging of rocks and concrete
• porosity of sedimentary rocks
• heat transfer in concrete mixes
• spalling of rocks and concrete

What it concludes

• Sandstone cracks and spalls under extreme heat in a fire pit rather than exploding.
• Mudstone, basalt, and slate remain intact without cracking under high heat.
• Standard, fast-setting, crack-resistant, and refractory concrete do not explode under intense fire pit heat but can develop cracks and spalling over time due to thermal stress and water content.