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Two-component polyurethane grouting material for repair and maintenance of road and preparation method thereof

A two-component polyurethane and grouting material technology, used in road repair, roads, roads, etc., can solve the problems of insufficient filling, easy blockage of grouting guns, and uplift of the road surface, so as to improve the durability and construction efficiency. , good compatibility

Inactive Publication Date: 2012-06-27
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new product described in this technical solution improves upon existing roads' maintenance methods due to their ability to maintain fast flow without causing problems like rutting underground. These improvements include lower temperatures (-20°C), longer hours between pourings, use of different types of grouts made from specific chemical compositions, better mixing performance during placements, less frequent repairs, reduced shrinkage overcomes issues associated with older solutions, including poor cohesiveness when filled up tight spaces on top layers, increased risk of empty holes, etc., while still having excellent properties.

Problems solved by technology

This patent describes different technical solutions aimed at improving concrete roads' durability during their use over longer periods. These improvements involve adding specialized grouts made from specific chemical mixtures called polythaferrite grants, which improve its hardness and resistance against crackings compared to regular sand fillers like quartcrete. Additionally, these techniques help reduce environmental concerns associated with conventional methods involving expensive raw materials and complicated processes.

Method used

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  • Two-component polyurethane grouting material for repair and maintenance of road and preparation method thereof
  • Two-component polyurethane grouting material for repair and maintenance of road and preparation method thereof
  • Two-component polyurethane grouting material for repair and maintenance of road and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]

[0043] The preparation method comprises the following steps:

[0044] In a reaction kettle equipped with a condenser and agitator, mix polyether YC-4110 and trimethylolpropane, start stirring evenly and heat up to 80°C, then add water, SD-601, and triethylamine to keep warm for a while Hours, drop the temperature and recover to obtain A component;

[0045] Stir and mix with component B at room temperature.

[0046] The volume began to expand after 50s, and the gel solidified after 120s; the mechanical performance test results showed that the compressive strength was 4.33MPa, the tensile shear strength was 1.89MPa, and the T-peel strength was 0.29 N / mm.

Embodiment 2

[0048]

[0049]Preparation method is identical with embodiment 1

[0050] After 50s, the volume began to expand, and after 120s, the gel solidified; the mechanical performance test results showed that the compressive strength was 2.87MPa, the tensile shear strength was 1.54MPa, and the T-peel strength was 0.22 N / mm.

Embodiment 3

[0052]

[0053] The preparation method comprises the following steps:

[0054] Mix polyether YC-4110 and pentaerythritol, stir evenly and heat up to 100°C, then add water, SD-601, dibutyltin dilaurate and keep it warm for one hour, cool down and recover to obtain component A; mix with component B at room temperature Stir to combine well.

[0055] The volume began to expand after 25s, and the gel solidified after 60s; the mechanical performance test results showed that the compressive strength was 4.50MPa, the tensile shear strength was 2.71MPa, and the T-peel strength was 0.33N / mm.

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Abstract

The invention relates to a two-component polyurethane grouting material for repair and maintenance of a road and a preparation method thereof. The two-component polyurethane grouting material is formed by mixing a component A with a component B through foaming expansion. The component A comprises the following raw materials in parts by weight: 800 to 900 parts of polyether glycol, 50 to 150 partsof cross linking agent, 10 to 30 parts of foaming agent, 10 to 30 parts of foam stabilizer, and 10 to 40 parts of catalyst. The component B comprises 500 to 1,000 parts by weight of poly methylene polyphenyl isocyanate. The two-component polyurethane grouting material has the advantages that the two-component polyurethane grouting material is used as a road maintenance material, also has low viscosity which meets the grouting requirement at a temperature of below zero, can effectively penetrate the inside of cracks of a foundation and can be cured in 1 to 10 minutes at normal temperature; thecuring time of the two-component polyurethane grouting material can be regulated by the type of the catalyst and the addition amount; the construction efficiency is improved; and the problem that when the road is repaired, the traffic needs to be blocked for a long time is solved.

Description

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Claims

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Application Information

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Owner WUHAN INSTITUTE OF TECHNOLOGY
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