Pressure experiment of red brick

This is a video about red brick pressure test that I accidentally brushed yesterday. Very interesting. The red brick before 130, 70 years ago or 202 1, which is harder?

Will we habitually judge that 202 1 is a difficult year? Why? Because the technology of making red bricks now is definitely more advanced than before 130, whether it is fire control technology, firing time control, raw material control ... now the intelligent age is better.

But the result of the experiment is shocking, because the older you get, the more demon you get. The red brick before 130 can bear the maximum pressure, and the pressure value reaches 1 175kg, the last time in 70 years, and the lowest is 202 1. The younger you are, the less you can bear the pressure.

Looking back at the current buildings, have you found that every ten years or so, a number of buildings will be replaced, while the ancestral temple built in the village fifty years ago still stands?

Is this also the reason why there are fewer and fewer buildings in a century or a thousand years?

Let's compare it from the common sense of physics. Wood is harder than foam, and steel is harder than wood. The reason is that steel is denser and its internal structure is denser. It can be concluded that the red brick before 130 is harder because its internal structure is denser, indicating that the brick before 130 is better and more durable.

In architecture, safety, applicability and durability are generally called structural reliability. Imagine, if the materials are unreliable, will our house be reliable enough? Why is the reliability of red brick not as good as that of 130 years ago and 70 years ago in modern times with more advanced technology?

It is true that for various reasons such as resources and environmental protection, we have innovated more types of new masonry materials, but their reliability needs to be verified. Especially in outdoor rooms filled with water, choosing more reliable and denser building materials can bring us a better living environment and living experience.

I hope that the older generation will not laugh at the new generation of red bricks in the future, because it is really embarrassing!