131 COMPARATIVE STUDY OF PHYSICAL AND MECHANICAL .mixtures slurry seal for surface finishing used for the construction of roads, highways, . and road construction and aggregates for railway ballast or raw stone used . listed above, raw basalt result of quarrying activity is machinable - crushing.ballest road material crusher,Aggregates - New Zealand Petroleum and Minerals. material to form concrete or mortar, or used alone for railway ballast, road .. 2000) to encourage the use of a wider range of materials for road aggregate. Size .. Aggregate processing usually involves crushing and screening to produce a.DiGMapPlus Engineering properties: use as engineered fill .specialist aggregate for road surfaces, coated roadstone and railway ballast. ... 'Rock' fill means that the material is likely to require crushing before use.
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