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Polyurethane resin mortar for cement base material repairing

A polyurethane resin and cement-based material technology, which is applied in the field of polyurethane resin mortar, can solve the problems of poor aging resistance, long curing time, and slow strength growth, and achieve the effects of good low-temperature curing, excellent durability, and fast curing speed

Active Publication Date: 2011-08-31
BEIJING TIEKE SPECIAL ENG TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, epoxy resin repair materials are commonly used in the repair of concrete structures and cement asphalt mortar structures. This type of repair material has the advantages of high strength and low price, but epoxy resin repair materials also have high brittleness and aging resistance. poor disadvantage
At the same time, epoxy resin mortar has a long curing time and is very sensitive to temperature. When the temperature is very low, the curing time is very long and the strength growth is very slow. It cannot be used for structures that need to be repaired quickly, which limits the use of epoxy resin mortar. Use in maintenance of concrete structures and cement-asphalt mortar structures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Composition of polyurethane resin mortar: Component A: 100 parts of polyether polyol, 20 parts of plasticizer dibutyl phthalate, 0.2 part of catalyst dibutyltin dilaurate, defoamer A-530 (BYK, Germany) 0.1 part, 10 parts of chain extender 1,4-butanediol, 2 parts of coupling agent KH-550, 2 parts of ultraviolet absorber UV-327, 2 parts of antioxidant 1010. Pour the above-mentioned parts of materials into the reaction kettle, stir for 1 hour under the condition that the rotating speed is 100 rpm, the temperature is 90 ° C, and the pressure is -0.1 MPa, and after cooling, the material is discharged and packaged as the A component.

[0020] B component: MDI (Yantai Wanhua), directly packaged as B component.

[0021] Component C: 20 parts of cement, 80 parts of river sand. Use a mixer to mix evenly and then pack it as component C.

[0022] The polyurethane resin mortar composition of the present invention is obtained by stirring and mixing the above three parts of raw mate...

Embodiment 2

[0025] Composition of polyurethane resin mortar: A component: 40 parts of polyoxypropylene triol, 60 parts of polytetrahydrofuran diol, 5 parts of plasticizer dioctyl phthalate, 0.01 part of catalyst stannous octoate, defoamer BYK- 0.5 part of 066N (BYK, Germany), 30 parts of chain extender 3,3'-dichloro-4,4'-diamino-diphenylmethane (MOCA), 3 parts of coupling agent KH-560, light stabilizer 744 5 copies. Pour the above-mentioned parts of materials into the reaction kettle, stir for 0.5 hours under the condition that the rotating speed is 150 rpm, the temperature is 80 ° C, and the pressure is -0.09 MPa, and after cooling, the material is discharged and packaged as the A component.

[0026] B component: PAPI (Yantai Wanhua), directly packaged as B component.

[0027] Component C: Quartz sand. Direct packaging as C component.

[0028] The polyurethane resin mortar composition of the present invention is obtained by stirring and mixing the above three parts A, B and C in a wei...

Embodiment 3

[0031] Composition of polyurethane resin mortar: Component A: 100 parts of polybutadiene glycol, 60 parts of plasticizer diethylene glycol dibenzoate, 1 part of catalyst lead isooctanoate, 2 parts of catalyst potassium acetate, defoamer A -530 2 parts, chain extender trimethylolpropane 15 parts, hydrolysis stabilizer 1 part. Pour the above-mentioned parts of materials into the reaction kettle, stir for 1.5 hours under the condition that the rotating speed is 120 rpm, the temperature is 110 ° C, and the pressure is -0.08 MPa, and after cooling, the material is discharged and packaged as the A component.

[0032] B-component: HMDI (BASF), directly packaged as B-component.

[0033] Component C: 30 parts of heavy calcium, 10 parts of silica fume, 20 parts of titanium dioxide, and 50 parts of river sand. Use a mixer to mix evenly and then pack it as component C.

[0034] The polyurethane resin mortar composition of the present invention is obtained by stirring and mixing the abov...

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PUM

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Abstract

The invention relates to a polyurethane resin mortar composition for cement base material repairing, which comprises raw materials A, B and C, wherein the raw material A comprises the following materials in parts by weight: 100 parts of polyalcohol, 5-60 parts of plasticizer, 0.01-3 parts of catalyst, 0-2 parts of defoaming agent, 0-30 parts of chain extender or crosslinking agent, 0-3 parts of coupling agent and 0-10 parts of stabilizer; the raw material B is isocyanate or prepolymer thereof; the raw material C is solid filler; and the mass ratio of the three raw materials A, B and C is 10:(1-30):(10-200). The composition is used as the repairing material for concrete structures of ballastless tracks and cement asphalt mortar, and has the advantages of high curing speed, good low-temperature curing property, high ductility and the like.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a polyurethane resin mortar used for repairing cement-based materials. Background technique [0002] Concrete structures are widely used in modern engineering constructions such as ports, dams, highways, bridges, municipalities, etc. due to their good mechanical properties and durability. Or biological erosion, cracks, defects and other deterioration damages often occur during service. These cracks and other damaged parts will become the way for the erosive medium to enter the interior of the concrete. - or CO 2 Existence and suitable environment will lead to corrosion of steel bars in concrete, and the expansion of corrosion products will exacerbate concrete cracking, thereby reducing the durability of concrete structures. Therefore, it is necessary to repair the concrete structure or cement-asphalt mortar structure in the damaged parts such as cracks and defects in time. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/16C04B111/72
Inventor 易忠来谢永江李化建谭盐宾
Owner BEIJING TIEKE SPECIAL ENG TECH CO LTD
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