Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses crack repair glue. The crack repair glue comprises a component A and a component B, wherein the component A comprises bisphenol A epoxy resin 618 and a polyester, and the component B comprises a modified aliphatic amine curing agent 593 and fumed silica. The bisphenol A epoxy resin 618 accounts for 20% by mass, the polyester accounts for 12% by mass, the modified aliphatic amine curing agent 593 accounts for 20% by mass, and the fused silica accounts for 3% by mass. The component A further comprises 2% by mass of an epoxy accelerator DMP-30. The component B further comprises 43% by mass of cement. The crack repair glue disclosed by the invention can resist shrinkage stress in a curing process of colloids and is further stable and durable, the fracture toughness of a structural glue hardened body is improved by nearly ten times in comparison with a system without adding a Qishi toughening agent and is also improved by above several times in comparison with a colloid system adopting polysulfide rubber, the mechanical strength and volume stability of the hardened body can be greatly increased, and the crack repair glue further has the advantages of good compatibility with concrete, no toxicity and no odor (environmental friendliness), simple, convenient and reliable construction, large construction and using temperature range (good heat resistance), good corrosion resistance and low cost.
The invention discloses crack repair glue. The crack repair glue comprises a component A and a component B, wherein the component A comprises bisphenol A epoxy resin 618 and a polyester, and the component B comprises a modified aliphatic amine curing agent 593 and fumed silica. The bisphenol A epoxy resin 618 accounts for 20% by mass, the polyester accounts for 12% by mass, the modified aliphatic amine curing agent 593 accounts for 20% by mass, and the fused silica accounts for 3% by mass. The component A further comprises 2% by mass of an epoxy accelerator DMP-30. The component B further comprises 43% by mass of cement. The crack repair glue disclosed by the invention can resist shrinkage stress in a curing process of colloids and is further stable and durable, the fracture toughness of a structural glue hardened body is improved by nearly ten times in comparison with a system without adding a Qishi toughening agent and is also improved by above several times in comparison with a colloid system adopting polysulfide rubber, the mechanical strength and volume stability of the hardened body can be greatly increased, and the crack repair glue further has the advantages of good compatibility with concrete, no toxicity and no odor (environmental friendliness), simple, convenient and reliable construction, large construction and using temperature range (good heat resistance), good corrosion resistance and low cost.
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