A study of possible leaching of contaminants such as lead, wear metals such as chromium, calcium and zinc and other additives from WODB-bitumen surfacing indicated that runoff is unlikely to contain heavy metal concentrations sufficient to cause health problems (Herrington et al., 1993).
Works Central Laboratory
Works Central Laboratory has investigated the use of a number of materials in road construction in New Zealand. Two of their main focuses have been on crumb rubber and waste oil distillation bottoms.
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