Bituminous composition and process for the preparation thereof

摘要

There is described a new form of mastic product for use in marine and other environments. The mastic product has the usual composition required of a mastic product but is in the form of granular particles and requires less energy to manufacture and use than the traditional moulded mastic blocks. The product is manufactured in a two-stage process involving in the first stage the formation of a half-product containing all the desired filler and aggregate but only a partial volume, say 20 to 40 % of the total desired bitumen. In the second stage, the remaining bitumen is added and the product allowed to form as the mixture cools.