Title:
HIGH PULVERIZATION RESISTANT BACKFILL GROUT AND BACKFILL GROUT MATERIAL THEREOF
Document Type and Number:
Japanese Patent JP2019011233
Kind Code:
A
Abstract:
To provide a backfill group having enhanced resistance to pulverization by repeated load, and a backfill group material thereof.SOLUTION: There are provided a backfill grout material containing a base grout material consisting of cement, a rapid hardening material, a short fiber, a water reducing agent and a setting modifier, with milling them to have content of the rapid hardening material of 1 to 6 mass%, content of the water reducing agent of 0.05 to 1.0 mass%, content of the setting modifier of 0.0 to 3.0 mass%, content of the short fiber of 0.01 to 0.5 vol.% based on volume of the backfill grout, and a water grout material ratio (W/B) of 35 to 65%, in which flow-down time of a JA funnel test is 26 sec. or less, bleeding is not generated, and compression strength at material age of 7 days after hydration hardening is 25 N/mmor more, and a backfill grout formed by the backfill group material.SELECTED DRAWING: Figure 1
Inventors:
SAITO KEIJI
KIMOTO DAISUKE
TOKUNAGA KENJI
IZU FUTOSHI
MOROHASHI KATSUTOSHI
AMAMIYA YOSHIKO
KIMOTO DAISUKE
TOKUNAGA KENJI
IZU FUTOSHI
MOROHASHI KATSUTOSHI
AMAMIYA YOSHIKO
Application Number:
JP2018069253A
Publication Date:
January 24, 2019
Filing Date:
March 30, 2018
Export Citation:
Assignee:
PORT & AIRPORT RES INST
MITSUBISHI MATERIALS CORP
PS MITSUBISHI CONSTRUCTION CO LTD
MITSUBISHI MATERIALS CORP
PS MITSUBISHI CONSTRUCTION CO LTD
International Classes:
C04B28/02; C04B16/06; C04B24/24; E01C7/14
Domestic Patent References:
| JP2011144103A | 2011-07-28 | |||
| JP2007063103A | 2007-03-15 | |||
| JP2008050213A | 2008-03-06 | |||
| JP2008274580A | 2008-11-13 | |||
| JPH05270880A | 1993-10-19 | |||
| JP2009173466A | 2009-08-06 |
Attorney, Agent or Firm:
Hiroshi Chiba