Asphalt plant technology and the Ukrainian specification

This is a trade subject and it is worth treating as one. A road programme is executed by asphalt plants, and which plant is installed determines what specification can be met and at what cost.

The two plant types

Batch plants, which mix a defined quantity at a time and can change recipe between batches. Continuous drum plants, which produce a single mix at higher output.

For a programme paving several different mixes and needing precise compliance with a specification, a batch plant is the correct choice, and it is what most Ukrainian road contractors installed.

What the climate demands

A short paving season, so plant capacity has to cover an annual volume in fewer months than in a milder climate. That pushes towards higher-output plants and towards storage silos that let production run while paving is interrupted.

Heated bitumen storage sized for the season, since bitumen has to be kept hot and delivery is not always reliable.

And insulation and burner capacity for cold-weather operation at the ends of the season.

The specification side

Performance-graded binder selection, which requires the plant to handle modified bitumen — polymer-modified binders need separate heated storage and accurate dosing.

Laboratory capability on site or nearby, because compliance is demonstrated by testing rather than asserted.

Recycled asphalt

Reclaimed asphalt pavement can be reintroduced into a new mix at a substantial percentage, which reduces both bitumen consumption and aggregate haulage. It requires a plant configured for it — a separate cold or hot feed — and it is the single largest cost saving available to a paving contractor.

The commercial point

Specify the plant for the mixes and the season you actually have, not for a catalogue figure. A plant sized for a Mediterranean paving season is idle capacity here.

This is the piece with the least distance between the archive and my working day. What the Ukrainian specification asks of European technology is three things: capacity that fits a short season, bitumen storage that works in the cold, and a high proportion of recycled asphalt in the mix. The number of plants that deliver all three is smaller than people assume — and that is exactly what decides the market.