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CN-122010463-A - Special self-leveling pad stone repairing material and preparation method and application thereof

CN122010463ACN 122010463 ACN122010463 ACN 122010463ACN-122010463-A

Abstract

The invention relates to the technical field of building materials, in particular to a special self-leveling pad repairing material and a preparation method and application thereof. The special self-leveling stone repairing material comprises, by weight, 50-90 parts of modified epoxy resin, 3-8 parts of dispersing agents, 2-6 parts of defoamers, 10-25 parts of diluents, 8-14 parts of toughening agents, 8-14 parts of synergists, 6-12 parts of coupling agents and 2-6 parts of repairing accelerators, wherein the B component comprises, by weight, 30-70 parts of curing agents, and the C component comprises, by weight, 100-500 parts of fillers, 20-50 parts of pigments and 10-30 parts of compacting agents. The special self-leveling material for repairing the self-leveling pad stone has good self-leveling property, compressive strength, shrinkage resistance, freeze thawing resistance and fatigue resistance.

Inventors

  • SUN XUECHENG
  • HU XIAOBIAO
  • YU XINRAN
  • WANG MIN
  • ZHANG BEIBEI
  • XU WENJI

Assignees

  • 加固邦(上海)新材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260303

Claims (9)

  1. 1. The special self-leveling stone repairing material comprises a component A, a component B and a component C, and is characterized in that the component A comprises, by weight, 50-90 parts of modified epoxy resin, 3-8 parts of dispersing agent, 2-6 parts of defoamer, 10-25 parts of diluent, 8-14 parts of toughening agent, 8-14 parts of synergist, 6-12 parts of coupling agent and 2-6 parts of repairing accelerator, the component B comprises, by weight, 30-70 parts of curing agent, and the component C comprises, by weight, 100-500 parts of filler, 20-50 parts of pigment and 10-30 parts of compacting agent, wherein the synergist is at least one of magnesium aluminum silicate, triethanolamine oleate and modified carbon material; The preparation method of the modified carbon material comprises the following steps: reacting polytetramethylene glycol with a polyamine compound in the presence of an activating agent to obtain aminated polytetramethylene glycol; grafting reaction of the aminated polytetramethylene glycol and cyclodextrin derivative to obtain modified matter; and (3) carrying out composite grafting reaction on the modified substance and the carboxylated carbon material in an ethanol water solution to obtain the modified carbon material.
  2. 2. The special self-leveling stone repairing material according to claim 1, wherein the mass mixing ratio of the component A and the component B is (2-4) 1, and the mass of the component C is 1.0-3.0 times of the total mass of the component A and the component B.
  3. 3. The self-leveling property-repairing special material according to claim 1, wherein the modified epoxy resin is at least one of polyurethane modified epoxy resin, hydrogenated bisphenol a type epoxy resin, rubber modified epoxy resin, phenolic epoxy resin and organosilicon modified epoxy resin.
  4. 4. The self-leveling stone repairing special material according to claim 1, wherein the dispersing agent is at least one of sodium dodecyl benzene sulfonate, octyl phenol polyoxyethylene ether and fatty acid monoethanolamide, the defoaming agent is at least one of an organosilicon defoaming agent and a polyether defoaming agent, the diluting agent is at least one of propylene oxide butyl ether, propylene oxide phenyl ether, ethylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether and 1, 6-hexanediol diglycidyl ether, the toughening agent is at least one of dibutyl phthalate, polytetramethylene glycol monomethyl ether, polytetramethylene glycol dimethyl ether, tetra-butylene glycol monooctyl ether and carboxyl terminated nitrile rubber, the coupling agent is at least one of a silane coupling agent, a titanate and an aluminate coupling agent, and the repairing accelerator is at least one of N-methyldiethanolamine, tetramethylguanidine, triethylamine and 1, 8-diazabicyclo [5,4,0] undec-7-ene.
  5. 5. The self-leveling property-repairing special material according to claim 1, wherein the curing agent is at least one of a fatty polyamine curing agent, an isocyanate curing agent, an acid anhydride curing agent and an aromatic amine curing agent.
  6. 6. The special self-leveling pad stone repairing material according to claim 1, wherein the filler is at least one of crushed stone, river sand, glass powder, silica micropowder, mineral powder and boron nitride powder, and the pigment is at least one of carbon black, titanium dioxide, mica powder, talcum powder and aluminum oxide.
  7. 7. The self-leveling property-repairing special material for a stone according to claim 1, wherein the compacting agent comprises rare earth metal oxide or phosphate, the particle size of which is 0.05-10 μm, and the specific surface area of which is more than or equal to 20m2/g.
  8. 8. The preparation method of the special self-leveling pad repairing material is characterized by comprising the following steps of: (1) Mixing the modified epoxy resin, the dispersing agent, the defoaming agent and the diluent, dispersing at high speed for 3-8min, adding the toughening agent, the synergist, the coupling agent and the repair accelerator, continuing dispersing for 15-30min, and vacuumizing to obtain the component A; (2) Uniformly mixing a filler, a pigment and a compacting agent to obtain a component C; (3) And (3) independently packaging the component A, the component B and the component C, and uniformly mixing according to the mass ratio when in use to obtain the special material for repairing the self-leveling pad.
  9. 9. Use of a self-leveling property repair kit according to any one of claims 1 to 7 for repairing a road bridge, a railroad bridge property, a building structure node, an equipment installation foundation or a concrete member.

Description

Special self-leveling pad stone repairing material and preparation method and application thereof Technical Field The invention relates to the technical field of building materials, in particular to a special self-leveling pad repairing material and a preparation method and application thereof. Background In recent years, the bridge generally enters a maintenance period along with the extension of the service time of the domestic road bridge. In the preventive maintenance field, the research and development application of new technology and new material plays a key role in improving maintenance quality and prolonging the service life of the bridge. Wherein, the bridge support is used as an important force transmission component, and the performance state of the bridge support is directly related to the integral safety of the bridge. In the long-term operation process, the support is easy to generate diseases such as aging deformation, displacement and the like, so that the normal use of the bridge is seriously influenced, the driving safety is even endangered, and the support must be replaced in time. In the bridge support replacement construction process, in order to ensure that the upper surface and the lower surface of the newly replaced support are closely attached, the stress is more uniform, the quality after construction is ensured, and the levelness error of the upper surface of the support filler is required to be controlled within 0.1 mm. At present, a Jiangsu highway network mainly adopts two construction processes, namely, firstly, the cement-based self-leveling grouting material is poured again after the filler stone is entirely chiseled off, but the quality problems of levelness deviation, cracking, slurry floating and the like are frequently caused by factors such as material shrinkage, on-site proportioning and the like, and secondly, the paste material is adopted for leveling after the filler stone is locally chiseled off for 2-3cm, but the defects of low construction efficiency, high operation difficulty and the like exist. Aiming at the bottleneck of the prior art, the development of the novel self-leveling adhesive material has multiple advantages that the construction quality and efficiency can be obviously improved firstly, the existing filler stone can be recycled by minimizing the chiseling amount (2-3 cm), the environment-friendly construction concept is met, the novel self-leveling adhesive material is particularly suitable for narrow space scenes such as plate girder supports, and the problem that the compression resistance of the traditional cement-based material is insufficient when a thin layer (< 3 cm) is poured is solved. The innovative scheme can provide a more efficient and reliable solution for bridge bearing replacement engineering. Disclosure of Invention Aiming at the defects in the prior art, the invention provides a special self-leveling pad repairing material, and a preparation method and application thereof. In order to solve the technical problems, the invention adopts the following technical scheme: The special self-leveling stone repairing material comprises a component A, a component B and a component C, wherein the component A comprises, by weight, 50-90 parts of modified epoxy resin, 3-8 parts of dispersing agent, 2-6 parts of defoaming agent, 10-25 parts of diluent, 8-14 parts of toughening agent, 8-14 parts of synergist, 6-12 parts of coupling agent and 2-6 parts of repairing accelerator, the component B comprises, by weight, 30-70 parts of curing agent, and the component C comprises, by weight, 100-500 parts of filler, 20-50 parts of pigment and 10-30 parts of compacting agent, and the synergist is at least one of magnesium aluminum silicate, triethanolamine oleate and modified carbon material; preferably, the modified carbon material is obtained by condensing aminated polytetramethylene glycol and cyclodextrin to obtain a modified substance, and then grafting the modified substance and the carboxylated carbon material. Preferably, the mass mixing ratio of the component A and the component B is (2-4): 1, and the mass of the component C is 1.0-3.0 times of the total mass of the component A and the component B. Preferably, the modified epoxy resin is at least one of polyurethane modified epoxy resin, hydrogenated bisphenol A type epoxy resin, rubber modified epoxy resin, phenolic epoxy resin and organosilicon modified epoxy resin. The preparation method of the rubber modified epoxy resin comprises the steps of mixing 3-6 parts by weight of hydroxyl-terminated liquid nitrile rubber with 0.5-2 parts by weight of 2, 4-toluene diisocyanate in a nitrogen atmosphere, reacting for 2-6 hours at 75-100 ℃ to obtain a prepolymer, adding 8-16 parts by weight of epoxy resin, heating to 90-110 ℃, vacuumizing, and reacting for 3-6 hours at a temperature maintained to obtain the rubber modified epoxy resin. The hydroxyl nitrile rubber modified epoxy resin has the advantages