水泥基材料裂缝自修复技术研究

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中图分类号： TQ177.6+7 文献标志码：A文章编号：1001-5922（2026）03-0751-04

Research on self-healing technology for cracks in cement-based materials

NI Fubin

（China Railway Fifth Bureau Group Construction Engineering Co.，Ltd.，Guiyang 55Oo81，China）

Abstract：To improve the crack self-healing performance of cement-based materials，acrylicacid and acrylamide monomers were used asraw materials，supplemented with potassium persulfate as the initiator，polyethylene glycol diacrylate asthecroslinking agent，iron（II）acetylacetonate hydrateas thecatalystand wateras thesolvent，and the AA-AM copolymer cement-based material repair agent was prepared through copolymerization reaction.Meanwhile，bycontrollingthedoping amountofAA-AMcopolymer，cement mortartestblockswithself-healing performance and diferent doping amounts of AA -AM copolymer were prepared，and performance tests were carried out. The results showed that the AA-AM copolymer cement-based material repair agent had good water absorption performance and sustainable usability；the addition of AA -AM copolymer would reduce the compressive strength and flexural strength of cement mortar test blocks，but they were stillabove the minimum standard;under theactionof tap water environment，the widthof cracks repaired byAA-AMcopolymer wasreduced，and the repair performance of AA - AM copolymer was better at the doping amounts of 0.3% and 0.5% . It is concluded that different addition amounts can be selected according to the actual environment in practical application.

Key words ：cement-based materials ;cracks ;self-healing performance ;acrylic acid ;acrylamide

水泥是一种水硬性无机胶凝材料，加水搅拌后成浆体，能在空气中硬化或者在水中硬化，并能把砂、石等材料牢固地胶结在一起[1-2]。（剩余4842字）