Products are manufactured from trench arisings and other recovered soils, and once regraded and treated, can be used as alternatives to Road Base and Non-structural Concrete as well as being a replacement for Type 1 and other types of fill. Cost savings are enhanced when spoil arising from site can be diverted from landfill to the SMARTR® process and upcycled into the required aggregate, to be returned to the same site for re-use. Where possible, such closed loops also offer the opportunity to reduce transport costs by making best use of vehicle utilisation. Lorries removing spoil to the SMARTR® plant location, can, through careful planning, return with processed aggregate.
SMARTR® Hydraulically Bound Materials can be placed quickly and easily, by paver or excavator, often allowing the contractor to utilise on-site labour and plant for placement of material that would otherwise have been placed by a tarmac subcontractor.
With forthcoming changes to the codes for sustainable construction, the recovery rates offered by the SMARTR® process will assist in achieving higher sustainability targets and greater BREAAM ratings.
The performance of SMARTR® Hydraulically bound materials can often exceed the performance of unbound materials quite significantly. Whereas unbound materials achieve their performance through granular interlock, HBMs achieve the design criteria through use of cementitious binders, and performance is measured by compressive strength under a defined moisture condition value range. This can allow a reduction in specified thicknesses of sub-base and capping, or, more importantly, the more expensive overlying pavement layers.
All products are manufactured strictly in accordance with BS14227, and should be placed in accordance with the Specification for Highway Works Series 800 guidance. Sampling frequency of SMARTR® products exceeds the requirements in order to maintain consistency and uniformity. Value engineered designs, prepared by a recognised pavement engineer, are offered in support of replacement of bituminous layers, and the products themselves are supported by on-site training, placement advice and supervision, and on-going compliance testing.