December 2019
Overview
Construction of a 450m adoptable road with footpaths.
Construction
IBAA (Incinerator Bottom Ash Aggregate) was supplied from our Severnside plant at Avonmouth. IBAA Type 1 subbase was used on the roads, pathways and in the compound areas to construct a flat and stable surface for car parking. The roads were dug up to 700mm deep for the road box formation (cut and fill procedure). IBAA Type 1 subbase was placed at 200mm layers to build up levels to the underside of asphalt.
Benefit
IBAA is an extremely cost-effective material when compared to Primary Aggregates and BP UK is working towards a verified Carbon Footprint. There are also advantages logistically when using IBAA due to the low density of the material allowing for fewer vehicle movements as this gives volumetric advantages over primary materials.
Sustainability
The extraction of primary aggregates for construction and transport to construction sites places enormous pressure on the environment. Mineral mining accounts for 2.8% of the global greenhouse gas emissions. The use of manufactured aggregates from IBA prevents landfilling, mining of virgin raw materials and contributes to the circular economy.
