Two-component polyurethane grouting material for repair and maintenance of road and preparation method thereof
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A two-component polyurethane and grouting material technology, which is applied in road repair, roads, roads, etc., can solve problems such as insufficient filling, easy blockage of grouting guns, and uplift of the road surface, so as to improve durability and construction efficiency , good compatibility effect
Inactive Publication Date: 2013-09-18
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology
Chinese patents CN102093537A, CN102093536A, CN102079863A, etc. all belong to end-NCO single-component grouting materials, which need water to participate in the reaction and consolidate, but a large part of the road disease has no water seepage, so it cannot be directly applied to the maintenance of expressway grassroots maintenance
[0009] 3) It is difficult to control the amount of grouting. If the amount of grouting is too small, the grouting is not complete and the filling is not compact; if the amount of grouting is too large, the road surface will rise and bulge, which will affect the comfort and safety of driving;
[0010] 4) The grouting gun is easy to block, and the gun cleaning fluid pollutes the environment;
[0011] 5) The cost is high (about 260 yuan / square meter), and it is difficult to promote it on a large scale
Method used
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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] The volume began to expand after 50s, and the gel solidified after 120s; the mechanical properties 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 parts of 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; the curing 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
technical field [0001] The invention relates to a two-component polyurethane grouting material for road repair and maintenance and a preparation method thereof. Background technique [0002] The base types of highways in my country mainly include semi-rigid base and flexible base, among which semi-rigid base asphalt pavement is the main pavement structure form of high-grade highways in my country. After the completion of the highway, due to various reasons, many sections of the road will appear early damage. Such road surface diseases (such as cracks, subsidence, voids, looseness, potholes, etc.) are usually closely related to the quality of the base, and due to the strength of the base The early pavement failure caused by insufficient is common in engineering. Therefore, the repair and reinforcement of the road base is very important for the treatment of pavement diseases. [0003] The traditional road grouting material is cement. The well-mixed cement is pressed into the...
Claims
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Application Information
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