Lightweight block plant, Basra

A washed, pH-neutral medium was specified so the nutrient solution stays controllable without additional correction. The medium is washed, sterilised and reused after each crop cycle.

The site had limited bearing capacity in a seismic zone. Using structural lightweight concrete across every floor slab reduced the structural mass by roughly 22%.

That fed straight through into smaller column sections in the lower storeys and let one row of piles be taken out of the foundation design. Supply ran continuously over 14 months, each consignment delivered with its own certificate of analysis.

The yard sits on more than 12 m of soft marine clay. Calculations put consolidation settlement under a conventional embankment at over 400 mm across ten years.

Substituting the fill cut the load on the subgrade by about 75% and brought calculated settlement below 50 mm — with no preloading period and no delay to the construction programme.