A polyurethane repair material for settlement repair of ballastless track structure of high-speed railway
A ballastless track and repair material technology, applied in the field of polyurethane foam, can solve the problems of uncontrollable line shape, difficult construction on the track, heavy equipment weight, etc., and achieve fast strength development speed, ensure durability, and high dimensional stability Effect
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specific Embodiment 1
[0022] Specific embodiment 1 is as shown in table 1.
[0023] Table 1 Specific embodiment 1
[0024]
[0025] Note: Mw in the table represents the average molecular weight of the compound.
[0026] Use a high-pressure foaming agent to mix components A and B through high-pressure collision and inject them into a steel round mold with a cover on the top and the cover can move upward freely. The amount of polyurethane slurry injected is 1 / 4 of the volume of the round mold, with a cover The round mold is placed between the upper and lower pressure plates of the electronic universal testing machine, and the electronic universal testing machine is used to test the expansion force of the material after grouting. In the anti-fatigue performance test, the maximum load is 0.3MPa, the minimum load is 0.03MPa, and the loading frequency is 5HZ. Use a vernier caliper to measure the thickness of the sample before and after loading, and calculate the accumulated residual deformation after...
specific Embodiment 2
[0030] Specific embodiment 2 is as shown in table 3.
[0031] Table 3 Specific embodiment 2
[0032]
[0033] Note: Mw in the table represents the average molecular weight of the compound.
[0034] Specific embodiment 2 test method is identical with the test method of embodiment 1, and implementation effect is shown in Table 4.
[0035] Table 4 The performance of the polyurethane repair material produced according to specific embodiment 2
[0036] serial number
specific Embodiment 3
[0038] Specific embodiment 3 is as shown in table 5.
[0039] Table 5 Specific embodiment 3
[0040]
[0041]
[0042] Note: Mw in the table represents the average molecular weight of the compound.
[0043] Test method is identical with the test method of embodiment 1, and implementation effect is shown in Table 6.
[0044] Table 6 is according to the performance of the polyurethane repairing material that concrete embodiment 3 produces
[0045] serial number
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