| 摘要 |
<p>The present invention relates to an eco-friendly fill material mixing 30 parts by weight of coal powder, 30 parts by weight of red clay, 5 parts by weight of bamboo sawdust, 5 parts by weight of tree saw dust, 15 parts by weight of fermented compost of sewage sludge, 15 parts by weight of fermented compost of livestock waste, and 15 parts by weight of paper manufacturing sludge, and fermenting for 10-60 days.</p> |
