Patents Assigned to Chiyoda Chemical Engineering & Const. Co.
  • Process for strengthening soft soil
    Patent number: 4465518
    Abstract: A high water content soft soil, for example from the sea or river bed, may be improved in strength by incorporating thereinto a finely divided, quenched iron blast furnace slag treated with sulfuric acid, and a Portland cement. The sulfuric acid-treated slag is a product obtained by reacting a finely divided, quenched iron blast furnace slag, such as a water-granulated iron blast furnace slag, with sulfuric acid to convert a part of its calcium components into gypsum.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: August 14, 1984
    Assignee: Chiyoda Chemical Engineering & Const. Co.
    Inventors: Hajime Miyoshi, Etsuo Asanagi, Osamu Terashima