Grouting slurry

A grouting liquid and grouting technology, applied in the field of building materials, can solve the problems of hindering the diffusion of the grout, long time required for the wall to absorb the grout, and fast foaming speed.

Inactive Publication Date: 2015-07-22
SICHUAN YAHAO REAL ESTATE DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main grouting liquid is mainly composed of silicone and polyurethane prepolymer, but the grouting liquid is concentrated after being injected into the wall, and it takes a long time for the wall to absorb the grout, and the polyurethane prepolymer foams when it meets water. The speed is fast, the further diffusion of the slurry is hindered after foaming, and it is not easy to form an effective waterproof barrier in the wall

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Grouting solution A1, including 45 parts by weight of silicone and modified polyurethane prepolymer prepared by the following method:

[0028] Dehydrate 23 parts by weight of polyethylene adipate glycol and 3 parts by weight of polyuronic acid hemicellulose at 80-85°C and 0.08-0.10MPa vacuum for 1.5-2.0h; adjust the reaction temperature to 65-80°C, add 30 parts by weight of dicyclohexylmethane diisocyanate (HMDI) and 0.03 parts by weight of catalyst triethylamine, react for 1.0-3.0h; cool down to 25-30°C, add 2 parts by weight of chain extender ethylene di alcohol and 0.05 parts by weight of crosslinking agent diethylenetriamine.

Embodiment 2

[0030] Grouting solution A2, including 20 parts by weight of silicone and modified polyurethane prepolymer prepared by the following method:

[0031] Dehydrate 32 parts by weight of polyadipate-1,4-butylene glycol ester diol and 10 parts by weight of polyuronic acid hemicellulose at 80-85°C and 0.08-0.10MPa vacuum for 1.5-2.0h ;Adjust the reaction temperature to 65-80°C, add 38 parts by weight of toluene diisocyanate (TDI) and 0.15 parts by weight of catalyst stannous octoate, react for 1.0-3.0h; cool down to 25-30°C, add 3.5 parts by weight of chain extender 1,4-butanediol and 1.2 parts by weight of crosslinking agent tetraethylenepentamine.

Embodiment 3

[0033] Grouting solution A3, comprising 30 parts by weight of silicone and the modified polyurethane prepolymer prepared by the following method:

[0034] Dehydrate 26 parts by weight of polyadipate-1,4-butylene glycol ester diol and 7 parts by weight of polyuronic acid hemicellulose at 80-85°C and 0.08-0.10MPa vacuum for 1.5-2.0h ;Adjust the reaction temperature to 65-80°C, add 33 parts by weight of toluene diisocyanate (TDI) and 0.07 parts by weight of catalyst stannous octoate, react for 1.0-3.0h; cool down to 25-30°C, add 2.7 parts by weight of chain extender 1,4-butanediol and 0.08 parts by weight of crosslinking agent tetraethylenepentamine.

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PUM

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Abstract

The invention discloses grouting slurry. The grouting slurry comprises components in parts by weight as follows: 55-80 parts of modified polyurethane prepolymer and 20-45 parts of organic silicon, wherein the modified polyurethane prepolymer is polyurethane prepolymer modified by polyuronide hemicellulose. Polyurethane prepolymer modified by polyuronide hemicellulose is adopted, and hydroxyl contained in a polyuronide hemicellulose structure can have a reaction with an isocyanate monomer, so that polyuronide hemicellulose is introduced into a polyurethane prepolymer system under a certain reaction condition, and the polyurethane prepolymer is modified. Then the grouting slurry formed by mixing the modified polyurethane prepolymer and the organic silicon is injected into a wall and quickly diffuses through capillary pores of the wall, and an effective protective barrier is formed under the action of foaming filling of polyurethane prepolymer which has permeated into the wall quickly as well as the hydrophobic action of the organic silicon.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a grouting liquid. Background technique [0002] After long-term use of the built house, the moisture-proof layer of the foundation is damaged, causing the underground water vapor to move upward through the capillary pores of the wall, and the plaster layer is mildewed, peeled, and peeled off. Surface efflorescence, weathering and other phenomena. The grouting fluid can be injected into the wall, and the purpose of filling, reinforcement or water blocking can be achieved after the grout condenses and hardens. At present, the main grouting liquid is mainly composed of silicone and polyurethane prepolymer, but the grouting liquid is concentrated after being injected into the wall, and it takes a long time for the wall to absorb the grout, and the polyurethane prepolymer foams when it encounters water The speed is fast, and the further diffusion of the slurry is hinde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08G18/64
Inventor 贺昶明
Owner SICHUAN YAHAO REAL ESTATE DEV
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