| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition capable of realizing an improvement in operating efficiency, drilling properties and a reduction in discharged residual soil at the time of improving the ground and useful for the impovement, or the like, in the foundation ground of a structure, a retaining wall, or the like, by mixing a cement-based material with a specific powdery polymer. SOLUTION: This composition contains (A) a cement-based material, (B) a powdery polymer (salt) having functional groups which are carboxylate groups or sulfonate groups [e.g. a homopolymer (salt) of acrylic acid, an acrylic acid/ methacrylic acid copolymer (salt), a copolymer (salt) of anα,β-dicarboxylic acid-based monomer and an ethylenically unsaturated monomer or ligninsulfonic acid (salt)]. The composition preferably contains the components A and B so as to provide (99.99/0.01) to (80/20) weight ratio of the components A/B. |
