Nanometer magnesium oxide dispersion liquid for well cementation, cement paste as well as preparation method and application of nanometer magnesium oxide dispersion liquid

• Main Authors: LI XIAOJIANG, WEI HAOGUANG
• Format: Patent
• Language: Chinese; English
• Published: 14.04.2023
• Subjects: ADHESIVES; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DYES; LIME, MAGNESIA; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention discloses a nanometer magnesium oxide dispersion liquid for well cementation, cement paste and a preparation method and application thereof. The nano magnesium oxide dispersion liquid is prepared from nano magnesium oxide, a dispersing agent, a surface coating agent, a stabilizer, a pH regulator, water and an optional defoaming agent, and the dispersing agent is a polyanion dispersing agent. The nano magnesium oxide dispersion liquid disclosed by the invention has better rheological property and higher stability, and when the nano magnesium oxide dispersion liquid disclosed by the invention is used for curing, hydration shrinkage does not occur. 本发明公开了一种固井用纳米氧化镁分散液、水泥浆及其制备方法和应用。本发明的纳米氧化镁分散液的制备原料包括纳米氧化镁、分散剂、表面包覆剂、稳定剂、pH调节剂、水和任选的消泡剂，其中，分散剂为聚阴离子分散剂。本发明的纳米氧化镁分散液具有较好的流变性能和较高的稳定性，采用本发明的纳米氧化镁分散液进行养护时，不发生水化收缩。