INJECTION MATERIAL FOR OPEN-GRADED MIXTURE, AND METHOD OF CONSTRUCTING SEMI-FLEXIBLE STRUCTURE USING THE INJECTION MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide an injection material for an open-graded mixture which expresses strength in a short time, enables securing of workability and good injection into an existing open-graded mixed structure by keeping good initial fluidity, and can improve fillability, and also to provide a simple and easy construction method for a semi-flexible structure excellent in durability.

SOLUTION: The injection material is obtained by blending a high performance water reducer of 0.2-1.6 pt.wt., a lignin-based retardant of 0.2-1.2 pt.wt. and an oxycarboxylic acid-based retardant of 0.01-0.30 pt.wt. based on 100 pts.wt. of a mixture material having the blending ratio of 50-80 wt% extra-quick hardening cement and 20-50 wt% fly ash classified to≤20μm.

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