12-11-2010, 01:05 PM
I suspect that on unballasted track, the track is isolated from the roadbed so noise is not transmitted. Once you add ballast and glue, the glue makes the roadbed, ballast, and track one piece and noise is no longer isolated.
I think I read somewhere that if you mount your cork to your bench work using a thin film of silicone for glue, and allow the silicone to cure completely, then you mount your track to the cork with silicone and allow everything to cure before ballasting, the noise will be reduced considerably. The noise is essentially caused by vibration transmitted from the track to the bench work, and the silicone has enough cushion to isolate the vibration.
I think I read somewhere that if you mount your cork to your bench work using a thin film of silicone for glue, and allow the silicone to cure completely, then you mount your track to the cork with silicone and allow everything to cure before ballasting, the noise will be reduced considerably. The noise is essentially caused by vibration transmitted from the track to the bench work, and the silicone has enough cushion to isolate the vibration.