Supplying materials at reconstruction scale

Reconstruction is a materials problem before it is a money problem. Four inputs dominate the bill of quantities and each behaves differently.

Cement

Produced domestically, energy-intensive, and difficult to import because it is cheap per tonne and expensive to move. A cement plant serves a radius of a few hundred kilometres and beyond that the freight exceeds the product cost.

Domestic capacity is therefore the binding factor, and it depends on kiln availability and on the electricity and fuel to run them.

Reinforcing steel

Produced domestically from scrap and from primary steel, and importable when needed. The constraint is rolling capacity and the electricity to drive it.

Demolition rubble is a scrap source, which links the debris question directly to the steel supply.

Bitumen

A refinery product, and the one most likely to be imported. Storage matters because it must be kept hot, so supply chain planning includes heated tank capacity at terminals rather than only shipping.

Aggregate

Quarried, heavy, cheap and the largest single tonnage in any construction programme. Transport cost dominates entirely: a quarry fifty kilometres from a site beats one two hundred kilometres away regardless of price at the gate.

Recycled aggregate from processed rubble competes directly on that logic and wins where it is available.

The price effect to expect

Demand concentrated in time raises prices for all four. A programme that phases work regionally and contracts materials on multi-year terms buys more construction than one that tenders everything at once and discovers what a seller's market feels like.

I deal with three of these four every day, and the critical difference between them is this: cement and aggregate have to be local, while bitumen and steel can be imported. Price pressure therefore does not arrive on all four at once — it shows up first in the local ones, because building a plant takes longer than waiting for a ship. Anyone looking for the bottleneck in imports is looking in the wrong place.