| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an ultrafine particle injectable material composition which is excellent in dispersibility and dispersion retention capability, and is easily injectable in fine particle spacings of a ground and cracks of a bedrock. <P>SOLUTION: The ultrafine particle injectable material composition is composed of an ultrafine particle cement with 10 volume% or less of particles with a particle size of 16μm or over containing a blast-furnace slag and a gypsum, and a copolymer of a repetitive unit derived from a monomer represented by a general formula (1) (wherein R<SP>1</SP>represents hydrogen atom or a hydrocarbon group; R<SP>2</SP>represents hydrogen atom or methyl group; AO represents an oxyalkylene group; and p, q and r represent an integer), acrylic acid, its salt or its monomer in which the hydrogen atom bound with its double bond carbon is substituted with methyl group, carboxyl group or its salt, carboxymethyl group or its salt. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
