Title:
HIGHLY DURABLE BACK-FILLING GROUT MATERIAL
Document Type and Number:
Japanese Patent JP2021123507
Kind Code:
A
Abstract:
To provide a back-filling grout material having enhanced initial strength in 2 hour material age and having sufficient long-age strength, thereby having excellent durability to repeated loads.SOLUTION: This invention relates to a highly durable back-filling grout material, characterized in that the fiber is a dissociative bundled fiber which is kept in a converged state during dry blend and is defibrated into single fibers after the dry blend. Preferably, the fiber is a dissociative bundled fiber in which, when the fiber is kneaded with the grout material and water to obtain a grout, an aggregation ratio 2 minutes after starting the kneading is 20% or less. In the highly durable back-filling grout material, flow-down time of the grout kneaded in a ratio (W/B) between water and the grout material of 35-65%, measured by JA funnel flow test, is 30 seconds or less; and compression strength in 2 hour material age of the grout after hydration hardening is 2 N/mm2 or more.SELECTED DRAWING: Figure 1
Inventors:
TAHARA HIDEO
TAKAHARA KONOSUKE
KIMOTO DAISUKE
IZU FUTOSHI
FUKUTE TSUTOMU
NISHIDA TAKAHIRO
MOROHASHI KATSUTOSHI
AMAMIYA YOSHIKO
TAKAHARA KONOSUKE
KIMOTO DAISUKE
IZU FUTOSHI
FUKUTE TSUTOMU
NISHIDA TAKAHIRO
MOROHASHI KATSUTOSHI
AMAMIYA YOSHIKO
Application Number:
JP2020015631A
Publication Date:
August 30, 2021
Filing Date:
January 31, 2020
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; C04B22/08; C04B22/14; C04B24/26; E01C7/14; E01C23/10
Attorney, Agent or Firm:
Hiroshi Chiba