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...Pavement layers procedure manual specification and key points at least seven days before a proposed material s use sample of the along with laboratory test results have to be submitted by contractor engineer for approval fresh is required if changed sub base must graded sufficient fines that they can properly compacted all areas segregated coarse or fine corrected removed replaced complying continued checks on materials carried out throughout contract period tests indicate changes occurred immediately informed moisture content time compaction appropriate produce dense layer does not conform thickness tolerance once correction completed area should rechecked ensure it conforms correct depth cross fall degree each tested square metres show density achieved further undertaken shaped approved ahead placing subsequent may page general large contracts contractors are make arrangements process stockpile therefore generally preparation storage road allowed small however when existing used in n...