Hollow bricks are made of clay, shale, etc., which are processed by raw materials, formed and sintered. The advantages of hollow bricks are light weight, high strength, good insulation, sound insulation and noise reduction. In the magnitude 5.8 earthquake that occurred in Yingjiang, Yunnan in March 2011, the collapse of houses using hollow bricks caused many deaths. Due to safety hazards, Yunnan plans to ban hollow bricks. The construction in Shandong Province has also stopped using hollow bricks.
Hollow brick is the main wall material commonly used in the construction industry in recent years. Due to its light weight and low consumption of raw materials, it has become the first product recommended by the national construction department. Like red bricks, the common manufacturing materials for hollow bricks are clay and cinder ash, with a typical size of 390 x 190 x 190 mm.
The total area of ​​the hollow bricks in the area of ​​the bricks, which is called the hollow bricks, should be more than 15%. Compared with solid bricks, hollow bricks can save a lot of land and brick fuel, reduce transportation weight, reduce labor intensity during brick making and masonry, speed up construction progress, reduce building weight, increase building layers and reduce construction cost. .
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