ADDITIVE FOR HYDRAULIC COMPOSITION, AND HYDRAULIC COMPOSITION

• Main Authors: KOBAYASHI RYUUHEI, FURUTA AKIHIRO, TAMAKI SHINJI, MASE ATSUYUKI
• Format: Patent
• Language: Chinese; English
• Published: 15.06.2021
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

Provided are an additive for a hydraulic composition, and the hydraulic composition, which allow bleeding to be reduced while maintaining dispersion, slump retention, and separation resistance properties of the hydraulic composition. The additive for the hydraulic composition, includes a copolymer (A) that has a structure derived from a vinyl monomer including a constituent unit (1) and a constituent unit (2), additionally has a structure derived from a hydrophobic chain transfer agent including a sulfur atom, and has a mass-average molecular weight in terms of polyethylene glycol of 100000 to 2000000 as measured by gel permeation chromatography. 提供在保持水硬性组合物的分散性、坍落度保持性、抗分离性的状态下可减少渗出的水硬性组合物用添加剂及水硬性组合物。该水硬性组合物用添加剂含有共聚物(A)，该共聚物(A)是具有源自包含结构单元(1)和结构单元(2)的乙烯基单体的结构、同时具有源自包含硫原子的疏水性链转移剂的结构、且由凝胶渗透色谱法测得的聚乙二醇换算的质均分子量为100000以上2000000以下的共聚物。