| 摘要 |
A body ( 5 ) of set, initially pasty material, such as concrete, includes an electrically conducting path formed by a concentrated layer ( 6 ) of electrically conducting magnetizable elements, such as fibers (F) or granules (G), embedded in the initially pasty material and extending through at least a portion of the body ( 5 ). Electrically conducting terminal members ( 9 ) may be connected to the electrically conducting layer ( 6 ) at spaced-apart positions along the layer ( 6 ). A method of providing such a body ( 5 ) includes the steps of: (a) forming a body of the pasty material in which electrically conducting magnetizable elements (F) are dispersed, (b) applying a magnetic field to the body of pasty material to form from the magnetizable elements an electrically conducting layer embedded in the body of pasty material and extending at least through a portion the body ( 5 ), and (c) causing the body of pasty material containing the layer ( 6 ) to set. Before or after the setting of the body ( 5 ) of pasty material, electrically conducting terminal members ( 9 ), may be connected to the electrically conducting layer ( 6 ) at spaced-apart positions along the layer. |
