Concrete roadbed to trex ties adhesive?

Here in the desert we have to allow for expantion and contraction. Here is what I do

I get some plastic anchors




The piece of wire is from a spool of wire one would use to wire rebar together. You can get it at Home Depot


I drill a 1/4 in hole in the concret roadbed every 2 or 3 feet. Insert the plastic anchor then bend the wire over the tie.



I then mix my ballast in a mixer with portland cement The mixture is dry. I add color to the mix to tone down the gray I then use this mixture to ballast my track.

After everything is in place I wet the ballast and when it dryes everthing is held fast. Wash outs are a minamum

If I need to work on the track or replace sections because some local gentry has stepped on the track it is very easy to remove.

Dave,
I e-mailed the following to you, but put it here for others too.

I am happy with the Trex. Almost 5 years now and they are holding up well. No signs of rot (We do live in southern California â€"Dryâ€"but automatically water 3 or 4 days a week). My ties measure 9/16 inch wide (like LLagas Creek 1:32 ties) by 3/8 inch tall (to take the 3/8 inch long medium LLagas Creek ties). The spikes go in nicely and hold well. I push them in with a pair of needle nose pliers. There is no pre-drilling necessary. There is NO splitting. Occasionally, I will bend a spike during the process but this is due to my poor pushing angle or how I held that particular spike in the pliers. I just remove itâ€"straighten it outâ€"and put it back correctly. I use two spikes per rail every 3rd or 4th tie. I dipped the spikes in Dark Walnut stain but after the first year in the garden, they returned to about the same color as the original. I don’t remember the name of the color but it is about the color of LLagas creek plastic. If I need to cut more, I will not bother with the stain. I used the trex for a Ladder system rail bed for part of my RR and used the self starting deck screws to hold it together and they work great on the 1 x 2 and 2 x 2 inch pieces.



The only thing I am having trouble with is gluing the ties to the concrete portion of my road bed. Liquid nails holds the trex ties to the trex road bed better than to the concrete road bed. I glue the ties down first and then spike the rail like they do on indoor smaller scale models. I have only had to reinstall about 15% of my track after 5 years due to the glue failing on the high crossing traffic (dogs and children) portion. When/if I have to reinstall another or same portion, I will try not to be so cheap and lazy and try an epoxy product.