| 摘要 |
<p>A slurry of a soil material, a polyurethane resin forming solution and water is casted in a packaging tray and allowed to harden. The slurry comprises based on the weight of the soil material less than 15 % by weight polyurethane resin forming solution and handling is effected below 20 °C and preferably below 10 °C.</p> |
