| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a filling method for filling a tunnel cavity where water is present in an existing tunnel, and a filler composition. <P>SOLUTION: The filling method for filling a tunnel cavity for filling a cavity of the existing tunnel with a cementitious composition having the following characteristics is disclosed. A cementitious composition used to fill the cavity of the existing tunnel and having the following characteristics is also disclosed. (1) The cementitious composition includes a cementitious mineral, a cementitious quick hardening material, a thickener, a vinyl acetate polymer or copolymer, and water. (2) The cementitious composition has a pH 11 or less according to the underwater non-separation degree testing method (draft) of the underwriter non-separation concrete of the Japan society of Civil Engineers, an adhesion strength of not smaller than 0.8 N/mm<SP>2</SP>after sealed curing of an age of 7 days according to the measuring method of JSCE K 531 1999 and a bending strength of 2.0 N/mm<SP>2</SP>or more after underwater curing of an age of 7 days according to the measuring method of JIS A 1106 2006. <P>COPYRIGHT: (C)2010,JPO&INPIT |
