It’s A Big Club And You Ain’t In It Oligarchy Shirt

 With the world's supply of silica sand running dry at an alarming rate, with some countries like Vietnam at risk of running out of sand as soon as 2022, there is a need to find an alternative method. The Romans created concrete after possibly seeing the natural results through something called tuff rocks. This is the combo of volcanic ash, lime and seawater. Because of the addition of seawater to this mix, two very rare minerals, aluminous tobermorite and phillipsite, grow within the concrete. These minerals actually make the concrete mix stronger over time when exposed to seawater, which is in direct opposition to what happens to portland concrete or basically any modern day concrete, which erodes when exposed to seawater.

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