Asphalt Compaction

In order to produce materials in the laboratory with properties which most closely simulate those in the pavement, gyratory compactors and roller compactors are used. In gyratory compaction a 150 or 100mm cylindrical sample is subjected to a vertical compressive stress while the mould is subjected to a gyratory motion, at a specified angle to the vertical, that generates interparticle movement within the material. A slightly larger angle of compaction is specified in the USA and other non-European countries. Roller compaction is considered to be the laboratory method that produces materials which are most simulative of those laid in the highway. The most common type uses a steel faced roller to compact 305mm square slabs. A vibrating roller is an option used to increase compactive effort. The roller compactor developed at the LCPC in France uses single or twin pneumatic tyres that compact the mixture as it is incrementally pushed up inside the mould. The use of pneumatic tyres generates a kneading action and ensures that the aggregate is not damaged during compaction.

EN12697-10; EN12697-31; D6925; SHRP M-002; AASHTO T321/TP4			EN12697-22 STEEL ROLLER			EN12697-22 PNEUMATIC TYRED ROLLER; NF P98-250-2
CRT-GYR-EN Gyratory Compactor  2 x CRT-GYR-EN  2 x CRT-GYRM-100 Accessories			CRT-RC2S/V European Standard Roller Compactors  CRT-WTRCM-50 Accessories			CRT-RCENLD-III European Large Roller Compactor  CRT-WTRCM-50 Accessories

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