| 摘要 |
This invention is a sawable and nailable product for blocks, beams, pipes and construction components of various types. The ballast material used in manufacturing consists of lightweight ballast, where grain group fractionation varies between 2 and 20 mm. The ballast grain group is first bonded with cement or another binding agent. The product is then injected with polyurethane or the like, which fills out the external porosity. |
