This 18-month project will review technologies and standards, prioritise substation applications, develop representative mix designs, assess structural, durability, carbon and whole-life cost performance, and test a representative element. It will evaluate healing, permeability, mechanical performance, curing, constructability, supply-chain readiness and exposure conditions, including contact with transformer insulating fluids. The project will define the application envelope, limitations, quality controls and deployment route. It could improve infrastructure durability and resilience while reducing interventions, whole-life cost and carbon. Benefits will be quantified after Stage 1 validates the business-as-usual baseline and addressable asset population. 

Benefits

If successful, the solution could reduce crack-related inspection and repair, defer replacement, reduce materials and site activity, lower whole-life carbon, and improve the resilience of concrete assets. It may also reduce personnel exposure associated with interventions in operational substations. 
 
The project is undertaking Research and Development and the baseline evidence needed for a robust quantified benefit is not yet available. Stage 1 will therefore establish the current intervention Method, candidate asset population, crack incidence, fully burdened intervention cost, addressable proportion and likely adoption rate. The cost-benefit assessment will compare the Base Case Cost of conventional concrete plus inspection and repair with the Method Cost, including any self-healing material premium, quality control, testing and implementation costs. Conservative, central and upper scenarios will be reported, together with whole-life carbon impacts and a break-even assessment.