In the past, houses in rural areas were all made of red bricks. Why are they all hollow bricks or blue bricks now?

At present, red brick is the most popular building material in rural areas. It can be said that these bricks have been used for a long time. They are not only easy to use, but also economical. In the past, farmers could afford it for only a few cents. However, due to environmental reasons, red bricks have been discontinued and it is not easy to buy.

In fact, besides red bricks, there are also blue bricks and cement bricks. So which of these three bricks is stronger? In fact, everyone looks at this question from different angles, so the answer will be a little different.

First of all, blue bricks and red bricks are made of clay at high temperature. The color difference lies in whether they are exposed to oxygen during the firing process. When burning, there is enough oxygen and the brick is red; Insufficient oxygen, the brick is bluish gray. It can be said that the gap between red brick and blue brick is not big, but the performance of blue brick is obviously better than red brick in oxidation resistance, hydration and atmospheric erosion.

However, there are more red bricks in rural areas, mainly because the cost of blue bricks is higher and it will be more expensive. And farmers don't like cyan, they feel too cold and depressed. Red bricks still look prosperous, and farmers prefer this festive color, so now blue bricks are generally not produced and can't be bought if they want.

As for cement bricks, they are more environmentally friendly now, so they are widely promoted in rural areas, just to change the status quo of farmers replacing cement bricks with red bricks. However, the bearing capacity of cement hollow brick is lower than that of red brick, so it is not suitable for the bearing external wall of private houses. Unless it is a rural frame structure, the risk of using cement bricks is still relatively large.

This is why farmers like to use red bricks. Because they are more load-bearing, they can be directly used as load-bearing bricks. Farmers' long-term use of red bricks shows that there is no problem at all.