Granular, cohesive and cement bound materials (A8.1)

A8.1.1: All granular, graded granular, cohesive/granular, cohesive and cement bound materials laid above the surround to apparatus must be compacted in accordance with Table A8.1.

["100 mm", "150 mm", "200 mm"]

[ { "TypeOfMaterial": "Cohesive material (less than 20% granular content)", "Vibrotamper50": [{"key": "100 mm", "value": "4"}, {"key": "150 mm", "value": "8#"}, {"key": "200 mm", "value": "NP"} ], "SingleDrum600": [{"key": "100 mm", "value": "NP"}, {"key": "150 mm", "value": "NP"}, {"key": "200 mm", "value": "NP"} ], "AllAbovePlant": "For maximum and minimum compacted lift thickness see Table A2.6", "VibrotamperFooter": "Minimum 6 compaction passes;Maximum 100 mm compacted lift thickness" }, { "TypeOfMaterial": "Granular material (20% or more granular content including cement bound material)", "Vibrotamper50": [{"key": "100 mm", "value": "4"}, {"key": "150 mm", "value": "8#"}, {"key": "200 mm", "value": "NP"} ], "SingleDrum600": [{"key": "100 mm", "value": "12"}, {"key": "150 mm", "value": "NP"}, {"key": "200 mm", "value": "NP"} ], "AllAbovePlant": "For maximum and minimum compacted lift thickness see Table A2.6", "VibrotamperFooter": "Minimum 6 compaction passes;Maximum 100 mm compacted lift thickness" } ]

Table A8.1 Compaction requirements for granular, cohesive and cement bound materials
Compaction plant and weight category	Cohesive material (less than 20% granular content)			Granular material (20% or more granular content including cement bound material)
	Minimum passes/lift for compacted lift thickness up to			Minimum passes/lift for compacted lift thickness up to
	100 mm	150 mm	200 mm	100 mm	150 mm	200 mm
Vibrotamper 50 kg minimum	4	8#	NP	4	8#	NP
Single drum Vibrating roller
600-1000 kg/m	NP	NP	NP	12	NP	NP
1000-2000 kg/m	8	NP	NP	6	NP	NP
2000-3500 kg/m	3	6	NP	3	5	7
Over 3500 kg/m	3	4	6#	3	4	6
Twin drum Vibrating roller
600-1000 kg/m	NP	NP	NP	6	NP	NP
1000-2000 kg/m	4	8	NP	3	6	NP
Over 2000 kg/m	2	3	5#	2	3	4
Vibrating plate
1400-1800 kg/m²	NP	NP	NP	5	NP	NP
Over 1800 kg/m²	3	6	NP	3	5	7
All above plant	For maximum and minimum compacted lift thickness see Table A2.6
Compaction of small openings and narrow trenches must comply with S6.5.
Vibrotamper 25 kg minimum	Minimum 6 compaction passes Maximum 100 mm compacted lift thickness
Percussive rammer 10 kg minimum
Notes: NP = Not Permitted # = Not Permitted on wholly cohesive material i.e. clay or silt with no particles > 0.063 mm Single drum vibrating rollers are vibrating rollers providing vibration on only one drum Twin drum vibrating rollers are vibrating rollers providing vibration on two separate drums HBMs must be compacted in accordance with A10.2 Mechanical pole tampers may be considered for compaction around iron work.