| 摘要 |
<p>PURPOSE:To prevent the caking of unhardened concrete at a low cost and to enable easy crushing by mixing the concrete with coffee grounds contg. remaining coffee. CONSTITUTION:Unhardened concrete remaining in a concrete mixer is mixed with coffee grounds contg. remaining coffee as a material for preventing the caking of concrete. The caking of the unhardened concrete is prevented and the resulting solidified body can easily be crushed by applying pressure from the top by hand. Excess concrete can simply be discarded at a low cost without causing environmental pollution and aggregate, etc., can easily be recovered, as required.</p> |
