Method for protecting subgrade vertical wall from stone impacts in
backfill operation and laminate for accomplishing the same
    25.
    发明授权
    Method for protecting subgrade vertical wall from stone impacts in backfill operation and laminate for accomplishing the same 失效
    用于保护路基垂直墙与回填操作中的石头冲击和层压板的完成方法

    公开(公告)号:US5406759A

    公开(公告)日:1995-04-18

    申请号:US101864

    申请日:1993-08-04

    IPC分类号: B32B11/04 E02D31/02 E04B1/92

    摘要: An exemplary method for measuring the impact resistance of polymeric film-based laminates involves a falling dart test using laminates that are essentially fully adhered to an inclined mortar block in emulation of stone impacts in backfill situations. Methods for protecting subgrade vertical walls from stone impacts in backfill operations involve the use of a four-layer laminate having an impact energy of at least 50 lb-ft.sup.2 /sec.sup.2 in accordance with a falling dart test using a mortar block inclined at an angle of 60.degree. from vertical. The film-based laminate, comprising a center film having a Young's modulus of at least 200,000 psi (ASTM D 882), is surprisingly discovered to have synergistic properties to provide an average impact energy, as determined in accordance with the 60.degree. impact test, which far exceeds the additive impact energy of the components and which reflects more accurately the performance of the laminate in the actual backfill situation.

    摘要翻译: 用于测量聚合物膜基层压板的耐冲击性的示例性方法涉及使用层压板的落镖试验,其基本上完全粘附到倾斜的砂浆块中,以模拟在回填情况下的石头撞击。 用于在回填操作中保护路基垂直墙壁与石头撞击的方法涉及使用具有至少50lb-ft2 / sec2的冲击能量的四层层压材料,根据落下的飞镖试验,使用倾斜角度为 60°垂直。 令人惊奇地发现包含杨氏模量为至少200,000psi(ASTM D882)的中心膜的膜基层压板具有协同性能以提供根据60°冲击试验确定的平均冲击能量, 这远远超过了组件的添加剂冲击能量,并且更准确地反映了层压板在实际回填情况下的性能。