Patent ID: 7717998
Filing Date: 2010-05-18
Classification: C04B,C09K,Y02P,Y02W

Abstract:
1. An ultrafine particle grouting composition comprising ultrafine particle cement, wherein the ultrafine particle grouting composition is at least one selected from the group consisting of the following (i) and (ii): (i) the ultrafine particle grouting composition comprises ultrafine particle cement (A) and a polycarboxylic acid dispersant (C), and the ultrafine particle cement (A) comprises blast furnace slag and gypsum, and the ultrafine particle cement (A) has 10% by volume or less of particles having a particle diameter of 16 μm or more in powder form of the cement; and (ii) the ultrafine particle grouting composition comprises ultrafine particle cement (B) and a polycarboxylic acid dispersant (D), and the ultrafine particle cement (B) comprises 2 to 25% by weight of cement clinker containing 5% by weight or less of 3CaO.Al the ultrafine particle cement (B) has 60 to 80% by volume of particles having a particle diameter of 1 to 5 μm in powder form of the cement; and wherein the polycarboxylic acid dispersant (C) or (D) comprises a polycarboxylic acid copolymer, the polycarboxylic acid copolymer being a polycarboxylic acid copolymer (P-1) having a polyoxyalkylene ester constitutional unit (I) represented by the following formula (3): in the formula (3), R 1 representing a hydrogen atom or a hydrocarbon group containing 1 to 30 carbon atoms; R 2 being a hydrogen atom or a methyl group; AO representing an oxyalkylene group containing 2 to 18 carbon atoms; r representing a molar number of addition of the oxyalkylene group and being an integer of 2 to 300 and a carboxylic acid constitutional unit (II) represented by the formula (4): in the formula (4), R 3 representing a hydrogen atom, a methyl group, or —COOM 2 ; R 5 representing a hydrogen atom, a methyl group, or —CH 2 COOM 3 ; R 3 representing a hydrogen atom or a methyl group when R 5 is —CH 2 COOM 3 ; M 1 , M 2 , and M 3 each representing a member selected from the group consisting of a hydrogen atom, monovalent metal, divalent metal, ammonium group, and organic amine group.