Saline soils & sulfate-resistant concrete
Droitwich Spa (WR9) sits over triassic mudstones containing natural salt beds and saline groundwater along the River Salwarpe valley. Soil salinity and fluctuating groundwater tables require high-grade sulphate-resistant concrete haunching (DS-2 class) for edge restraints to prevent chemical degradation.
We excavate 200mm–225mm sub-bases with heavy geotextile membranes to isolate sub-base aggregates from shifting saline clay soils.