As a poor heat conductor, cement has a small heat capacity and a fast heat transfer speed, and its main component is concrete.
At sustained high temperatures, the water vapor inside the concrete expands due to heat.
Concrete is more airtight, and the pressure on the expanding water vapor will increase.
When the pressure exceeds a critical point, it can trigger**.
This kind of ** will release a huge amount of energy, which is enough to cause damage to the people around it.
When people are barbecuing or lighting a fire outdoors to keep warm, keep the grill or stove at a distance from the concrete floor.
If the oven does not have legs, you need to lay a layer of sand on top of the concrete floor and put a few bricks to support the oven.
In this way, the cement floor can be effectively prevented from expanding by heat.
When we barbecue outdoors, we should also pay attention to these four questions:
1.There should be no shrubs or excessive trees around the barbecue site, and no flammable materials around the downwind outlet.
Barbecues in places with poor air circulation, such as caves, should be avoided to avoid carbon monoxide poisoning.
2.There are many hidden dangers of outdoor barbecue, and if possible, the barbecue site should be close to a water source.
This makes it easier to get water and prevents fires.
3.When grilling outdoors, it is safe to clear at least 10 square meters of the barbecue area as a fire area.
There should be no flammable materials such as grass and trees, accumulated leaves, etc., in this 10 square meters.
4.When grilling outdoors, it is very easy to have a small fire running around, and a small fire extinguisher is needed to help.
If you don't have one, you can keep water in a bucket or other container and keep it next to the oven just in case.
5.When you leave after a barbecue, be sure to extinguish the fire thoroughly and leave no sparks.
At the same time, it is also necessary to thoroughly clean up the household waste, which is not only environmentally friendly, but also prevents fire hazards.