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How are the bricks used to repair the Great Wall made? [Copy link] 中文

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Post time 2018-4-21 09:52:13 |Display all floors

The Great Wall, one of the Seven Wonders of the World, was built more than 2,000 years ago. Regular repair work to the walls is needed to protect this symbol of Chinese civilization. The process to make the grey bricks used in the repair work is complicated. [Photo: IC]

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Post time 2018-4-21 09:52:54 |Display all floors

Firstly, it's necessary to choose good quality red clay to make good grey bricks. The clay needs to be thoroughly aired, then stirred and mixed with water to make mud. [Photo: IC]

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Post time 2018-4-21 09:53:19 |Display all floors

The mud is poured into a specially-designed frame to mold the brick. Workers then use tools to rub down the surface of the brick to make it smooth. [Photo: IC]

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Post time 2018-4-21 09:53:52 |Display all floors

Dry soil is scattered onto the bricks to prevent them from sticking together. They are then left for 20 days to dry out. [Photo: IC]

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Post time 2018-4-21 09:54:21 |Display all floors

After they have dried, the bricks are put into a kiln where they are fired at temperatures of up to 1,000 degrees Celsius. [Photo: IC]

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Post time 2018-4-21 09:54:49 |Display all floors

Just before the bricks are ready to come out of the kiln, workers pour water over the roof of the kiln. This last important step is what gives the bricks their grey color. [Photo: IC]

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Post time 2018-4-23 06:34:43 |Display all floors
Round Up is good for developing the mind

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