What Aggregates For Railway Sleepers Do I Need?

The amount of post fix required would depend on the size of the hole the railway sleeper is going in to.

When using postfix, position the sleeper level in the hole, open the bag and pour half the contents of the bag around the sleeper. Using a watering can fitted with a fine rose, pour clean water onto the base of the sleeper at the level of the post fix. After two minutes, check the position of the sleeper with a spirit level (front and side faces). Adjust as necessary. Pour the remainder of the post fix into the hole and add more clean water, directed onto the sleeper at ground level. Allow 15 - 20 minutes for initial set to take place, prior to commencing with further work.

If the sleeper has the concrete underneath as well as around the sides, the concrete can trap water and therefore soak the sleeper, greatly increasing the chance of decay.

If the ground the sleeper is sunk into is not free draining soil then a small layer of shingle can be placed under the sleeper to help drainage occur.

Ballast and cement, (approx. mix; 6:1). The amount or ballast and cement mixture required depends on the size of the hole that the sleeper is going into. 

If a sleeper has the concrete underneath as well as around the sides the concrete can trap water and therefore soak the sleeper, greatly increasing the chance of decay.

If the ground the sleeper is sunk into is not free draining soil then a small layer of shingle can be placed under the post to help drainage occur.