SPRAY MATERIAL AND SPRAYING METHOD USING THE SAME

• Main Authors: MISHIMA SHUNICHI, ARAKI AKITOSHI, TANAKA HIDEHIRO, IWASAKI MASAHIRO, TERAJIMA ISAO, MUROKAWA TAKAMITSU
• Format: Patent
• Language: English
• Published: 28.04.2011
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; LIME, MAGNESIA; METALLURGY; PERFORMING OPERATIONS; PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL,e.g. PLASTER; REFRACTORIES; SLAG; SOIL SHIFTING; TRANSPORTING; TREATMENT OF NATURAL STONE; UNDERGROUND OR UNDERWATER STRUCTURES; WORKING CEMENT, CLAY, OR STONE

PROBLEM TO BE SOLVED: To provide a spray material which has fast-setting property and initial strength development comparable to those of a powdery quick setting agent, can reduce the shrinkage quantity of a hardened body thereof and the quantity of ions to be eluted therefrom and can make small the quantity of powdery dust to be produced therefrom, and to provide a spraying method using the spray material. SOLUTION: The spray material contains: cement concrete containing cement, aggregate and a quaternary ammonium salt compound; alkali metal silicate having 3.3-4.5 molar ratio (SiO2/R2O) (wherein R is Li, Na or K) of silicon to the alkali metal salt in terms of oxides thereof; and a strength increasing material. The spraying method includes the steps of: forcibly feeding the cement concrete containing cement, aggregate and the quaternary ammonium salt compound by using a pump; mixing an aqueous solution of the alkali metal silicate to be fed by a liquid forcibly-feeding pump with the strength increasing material to be conveyed pneumatically, just before they are merged/mixed in the forcibly-fed cement concrete, to obtain slurry; and merging/mixing the obtained slurry with the cement concrete. COPYRIGHT: (C)2011,JPO&INPIT