Because of the nature of maxit LWA, many of the soil tests given in the Specification for Highway Works are not appropriate. A departure from the Specification should therefore be requested for maxit LWA for use in the situations described here.

For General Fill applications, it is proposed that the material be classed as General Granular Fill Class 1D, lightweight expanded clay aggregate (10-20mm) and General Granular Fill Class 1E, lightweight expanded clay aggregate (0-32mm) and that the relevant sections shown here are inserted in Tables 6/1 and 6/2 of the Specification for the contract.

For structures, it is proposed that the material be classed as Fill to Structures Class 6R, lightweight expanded clay aggregate (10-20mm) and Fill to Structures Class 6S, lightweight expanded clay aggregate (0-32mm) and that the relevant sections shown here are inserted in Tables 6/1 and 6/2 of the Specification for the contract.