<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
how do i ruin new cement?
<|assistant|>
New cement can be easily ruined by mixing in foreign material such as sand, gravel, and soda pop/juice bottles. The presence of these foreign materials will cause the new cement to harden prematurely and become unsafe. Furthermore, placing materials like rocks or bricks on top of the new cement before it has adequate time to harden can also cause it to be ruined.