Tataki (Japanese clay) - Tataki

Japanese: たたき(三和土) - たたき
Tataki (Japanese clay) - Tataki

A dirt floor finished with tataki-do (pounded earth). Tataki-do is a type of soil rich in soluble silica that has been weathered from rocks such as granite and andesite, and hardens when mixed with hydrated lime and water. Hon-kitataki refers to a mixture of tataki-do with roughly double the amount of lime, mixed with water and lye, and then spread over the dirt floor to a thickness of about 3 sun (about 9 cm) and pounded to harden. It is also called "shikku tataki." Nowadays, tataki-do has mostly been replaced by cement mortar or concrete.

It can also refer to the finishing method of hammering the surface of stone to leave fine marks, the basic process of polishing stone, or the job of a worker hitting a pillar or wall formwork with a mallet from outside when pouring concrete.

[Jin Nakamura]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

たたき土(つち)(叩き土、敲き土、三和土(たたき))で仕上げた土間。たたき土は、花崗(かこう)岩、安山岩などの風化した可溶性ケイ酸に富む土で、消石灰と水を加えて練ると硬化する性質をもつ。本来たたきとは、このたたき土に約倍量の石灰を混ぜ、水や灰汁(あく)で練ったものを三寸(約9センチメートル)厚ぐらいに土間に塗り、たたき固めたもののこと。「漆食叩(しっくいたた)き」ともいう。今日では、たたき土はほとんどセメントモルタルかコンクリートにかわっている。

 また、石の表面をたたいて細かな跡をつける仕上げ方や、石を磨く場合の基礎工程、あるいは、コンクリートを打ち込む際、柱や壁の型枠の外から作業員が木槌(きづち)でたたく作業をさすこともある。

[中村 仁]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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