| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a high void subgrade material contributed to the improvement of riding in a railway track, the reduction of maintenance work, the facility of use in a road, a park, various kinds of athletic equipments, etc. and a semi-rigid subgrade construction method. <P>SOLUTION: The subgrade material having water-granulated slag, cement and fly ash as main components mixed with silicon dioxide, aluminum oxide and magnesium oxide is manufactured, the subgrade material is laid and leveled to a set height, and a proper amount of water is sprayed thereon to solidify to lightly roll on. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
