newknowledge
チャンネル登録者数 619人
103 回視聴 ・ 2いいね ・ 2025/07/06
Looks like a wall of sandbags, right?
This is called a concrete backwall.
It's made by stacking dry cement bags directly in place.
No mixing, no molds, no stirring.
Just let nature do the job.
As water seeps in, the cement hardens—turning each bag into solid concrete.
It’s cheap, fast, durable, and you can even build it yourself.
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