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Fire-retardant high-flexibility two-shot grouting material and preparation method thereof

A two-liquid grouting, flame-retardant technology, applied in the field of building materials, can solve the problems of difficult control of product performance and stability, poor permeability and toughness, complicated production process, etc., and achieves adjustable curing time, low cost, Simple craftsmanship

Active Publication Date: 2015-05-06
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently commonly used inorganic grouting materials, such as water glass, cement, etc., although the cost is low and the reaction does not exotherm, but the curing time is long, the permeability and toughness are poor
Although the existing organic grouting materials have excellent mechanical properties and adjustable curing speed, they have poor flame retardancy and high cost
Disclosed a kind of preparation method of enhanced water-based polyurethane curing agent as Chinese patent document CN102504184A, introduces PPG in water-based polyurethane curing agent to increase hydrophilic performance; Chinese patent document CN103756291A discloses a kind of polyurethane-water glass composite grouting material And its preparation method and application, it adopts prepolymer to do, the production process is complex and the performance and stability of the product are not easy to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 A flame-retardant high-strength flexible two-liquid grouting material, the preparation method is as follows:

[0026] (1) Preparation of component A: Weigh 8 parts of PPG400, add 8 parts of water and stir evenly, then add 78.5 parts of water glass with a modulus of 2.3, 2 parts of sorbitol, and 0.5 parts of cetyl trimethyl chloride Ammonium, 3 parts of catalyst triethylenediamine, continue to stir evenly, and package for later use;

[0027] (2) Preparation of component B: Weigh 80 parts of polymethylene polyphenyl polyisocyanate, add 20 parts of acetyl tripentyl citrate, stir evenly, and package for later use;

[0028] (3) Mixing and curing: Mix component A and component B according to the mass ratio of A:B=1:1 and stir evenly, then react and cure at room temperature.

[0029] The product index of testing the material for 6 hours at normal temperature is as follows:

[0030] Compressive strength: 70.3MPa; flexural strength: 26MPa; maximum deformation during ...

Embodiment 2

[0032] Example 2 A flame-retardant high-strength flexible two-liquid grouting material, the preparation method is as follows:

[0033] (1) Preparation of component A: Weigh 8 parts of PPG200 and 8 parts of PPG600, add 12 parts of water and stir evenly, then add 64 parts of water glass with a modulus of 2.9, 4 parts of sorbitol, and 0.5 parts of octadecyltri Methyl ammonium chloride, 0.5 part of octadecyltrimethylammonium bromide, 1 part of pentamethyldiethylenetriamine, 2 parts of bis(3-dimethylaminopropyl)amine, continue to stir evenly, and package for later use;

[0034] (2) Preparation of component B: Weigh 60 parts of polymethylene polyphenyl polyisocyanate, add 20 parts of acetyl triethyl citrate and 20 parts of acetyl trihexyl citrate, stir evenly, and package for later use;

[0035] (3) Mixing and curing: Mix component A and component B according to the mass ratio of A:B=1:1 and stir evenly, and test the material at room temperature for 6 hours. The product indicators a...

Embodiment 3

[0037] Example 3 A flame-retardant high-strength flexible two-liquid grouting material, the preparation method is as follows:

[0038] (1) Preparation of component A: Weigh 6 parts of PPG400 and 10 parts of PPG800, add 12 parts of water and stir evenly, then add 66 parts of water glass with a modulus of 2.8, 3 parts of sorbitol, and 1 part of cetyl tris Methyl ammonium chloride, 2 parts of tris(dimethylaminopropyl)hexahydrotriazine, continue to stir evenly, and package for later use;

[0039] (2) Preparation of component B: Weigh 70 parts of polymethylene polyphenyl polyisocyanate, add 20 parts of acetyl tributyl citrate and 10 parts of acetyl triethyl citrate, stir evenly, and package for later use;

[0040] (3) Mixing and curing: Mix component A and component B according to the mass ratio of A:B=0.65:1 and stir evenly, react and cure at room temperature, and test the product index of the material at room temperature for 6 hours as follows:

[0041] Compressive strength: 59....

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Abstract

The invention relates to a fire-retardant high-flexibility two-shot grouting material and a preparation method thereof, and aims at solving the technical problems that an existing grouting material is poor in stability, poor in flexibility, low in compressive strength and high in cost. Polypropylene glycol (PPG), water glass, an emulsifier, a catalyst, sorbitol and water are adopted to form a component A; polymethylene polyphenyl isocyanate and acetyl citrate are taken as a component B; and the component A and the component B are mixed at the weight ratio of (0.65-1.3) to 1 when used. The grouting material disclosed by the invention is simple to prepare, low in cost, stable in performance, low in viscosity, controllable in curing time, excellent in flame resistance after being cured, high in strength, good in tenacity, good binding power, and free of foaming in a water environment, can still keep relatively high mechanical property, and is suitable for rapid reinforcement and seal leakage treatment of broken seam, terrane, concrete cracks, highway cracks and roadbeds.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a flame-retardant high-strength flexible double-liquid grouting material and a preparation method thereof. Background technique [0002] With the rapid development of underground tunnels, mines, hydropower stations, caverns, expressways and high-speed railways, more and more engineering geological problems are encountered, and many problems need to be dealt with quickly and effectively. Under such conditions, rapid solidification grouting technology is an effective way to control roadway surrounding rock and treat cracks in concrete and expressways. [0003] Currently commonly used inorganic grouting materials, such as water glass and cement, have low cost and no exothermic reaction, but the curing time is long, and the permeability and toughness are poor. Although the existing organic grouting materials have excellent mechanical properties and adjustable curing speed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/32C08G18/38C08G18/66C08G18/48C08K5/11
CPCC08G18/4804C08G18/4825C08G18/4845C08G18/6674C08G18/7664C08K3/34C08K5/11C08K5/19C08K2201/014
Inventor 杨政鹏刘玄张春静李海艳管学茂
Owner HENAN POLYTECHNIC UNIV
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