A high-bonding vibration-absorbing polyurethane repair material for settlement repair of solidified ballast bed
A repair material, polyurethane technology, applied in the direction of track, road, track maintenance, etc., can solve the problems of aggravated railway transportation and line maintenance and repair, increased maintenance and repair workload, poor maintainability of ballastless track, etc., and achieves strong deformation ability , high dimensional stability, good damping effect
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specific Embodiment 1
[0024] Specific Example 1 is shown in Table 1.
[0025] Drill the core of the concrete test piece and cut it into a sample with a size of φ50mm×25mm. Place the two samples in the center with a distance of 20mm between the samples. Seal the samples around with kraft paper and wide tape, leaving a grouting hole in the upper part , Use an electric mixer to mix the A component and B component into the cavity after high-speed mixing, demould after 1d, stick the metal side head on the outside of the concrete sample, and use the electronic universal testing machine to test the polyurethane repair material and The bonding properties of concrete materials, the tensile rate is 10mm / min. The maximum load of the fatigue resistance test is 0.3MPa, the minimum load is 0.03MPa, and the loading frequency is 5HZ. The thickness of the sample before and after loading is measured with a vernier caliper, and the cumulative residual deformation is calculated after 5 million times. The test results ar...
specific Embodiment 2
[0032] Specific Example 2 is shown in Table 3.
[0033] Table 3 Specific Example 2
[0034]
[0035]
[0036] Note: Mw in the table represents the average molecular weight of the compound.
[0037] The test method of specific embodiment 2 is the same as that of embodiment 1, and the implementation effect is shown in Table 4.
[0038] Table 4 Properties of the polyurethane repair material produced according to specific example 2
[0039] Serial number
specific Embodiment 3
[0041] Specific Example 3 is shown in Table 5.
[0042] Table 5 Specific Example 3
[0043]
[0044] Note: Mw in the table represents the average molecular weight of the compound.
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