spalling

The process of reducing (stone blocks, etc.) to an approximately level surface by hammering. / Any process that spalls a surface, or the damage that results from that process: spallation.

Japanese Meaning

ハンマーなどを用いて石やブロックの表面をほぼ水平な状態に整える加工工程 / 表面の剥離または破損現象、その工程の結果として生じる損傷

What is this buttons?

The mason demonstrated spalling to level the rough blocks before laying the foundation.

Google Translation / DeepL Translation

石工は基礎を築く前に、粗い石材をハンマーでたたいて平らにする作業を実演した。

Details

Sense（1）

The process of reducing (stone blocks, etc.) to an approximately level surface by hammering.

In the British-made Greek bricks the magma is not so evenly distributed, but after successive spallings the brick is converted bit by bit into the larger crystal formation […]

Google Translation / DeepL Translation