| 摘要 |
PCT No. PCT/JP83/00115 Sec. 371 Date Dec. 16, 1983 Sec. 102(e) Date Dec. 16, 1983 PCT Filed Apr. 14, 1983 PCT Pub. No. WO83/03602 PCT Pub. Date Oct. 27, 1983.A reinforcing steel fiber of the type to be mixed in concrete has a shaft portion at a center part, which has strength as a mother material. There are on both sides of the shaft portion, alternately formed knots expanding in thickness and knots expanding in width. The knots expanding in width become increased in width in the direction towards the ends of the fiber while they become decreased in thickness while knots expanding in thickness extend almost uniformly over the full length. |
