Hydraulic cement composition for injection into soil, and method for improvement in soil using same

• Main Authors: ISOBE HIROSHI, ONODERA HIROSHI, TANAKA HIDEHIRO, ARAKI AKITOSHI, MIZUSHIMA KAZUYUKI, OHNO YASUTOSHI, NISHINO HIDEKI
• Format: Patent
• Language: Chinese; English
• Published: 05.11.2014
• Subjects: ADHESIVES; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DYES; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; LIME, MAGNESIA; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; REFRACTORIES; SLAG; SOIL SHIFTING; TREATMENT OF NATURAL STONE; UNDERGROUND OR UNDERWATER STRUCTURES

Disclosed are: a hydraulic cement composition for injecting into soil, which has excellent penetrability and flow separation-preventing performance and also having a satisfactory level of strength development and excellent long-term durability; and a method for improving soil using the hydraulic cement composition. Specifically disclosed is a hydraulic cement composition for injecting into soil, which comprises a blast furnace slug micropowder, a classified cement, a polyacrylic acid dispersant, and a silicic acid alkali metal salt that can act as a flow separation inhibitor. The hydraulic cement composition is characterized in that the molar ratio (n) of the silicic acid alkali metal salt in general formula (1) is 3.5 or more and the the silicic acid alkali metal salt is contained in an amount of 0.2 to 7 parts relative to the total amount (100 parts) of the blast furnace slug micropowder and the classified cement. R2O?nSiO2 (R: an alkali metal) (1)