Self Compacting Soil (#57 stone) - Eng-Tips
网页2009年2月6日 · The #57 stone develops good density, (compaction), from free fall due to the many sizes available for each size void. With no compactive effort, a density of over 85%, (very limited settlement possibility) can be achieved with little excess horizontal pressure on the backfilled wall which can come from compaction energy.
Compacting AASHTO #57 - Earthwork/grading engineering - Eng …
网页2003年12月8日 · I do not believe it is referred to as 'AASHTO 57 stone', however, #57 stone as defined by quarries, state agencies, etc. is an aggregate blend of size 5, 6, & 7 stone. This material cannot be 'compacted' in a true sense, but can be properly oriented with compaction equipment.
Paving on 57 stone - Earthwork/grading engineering - Eng-Tips
网页2 Aug 10 10:04. 57 stone in pervious pavement has been in use for decades. The Walden Pond installation was the first pervious (asphalt) pavement installed in the US and has held up well since 1977. It was built with 2.5 inches of porous asphalt, over 1.5 inches of AASHTO Type A washed stone, over 10.5 inches of AASHTO Type B washed stone.
Friction angle for loose crushed stone? - Eng-Tips
网页2009年6月24日 · AASHTO ASD 1992 Table 5.5.5.B (was still at my lap when you were asking) Mass concrete on clean gravel, friction factor 0.55 to 0.60, Friction angle, delta, 29 to 31 deg. On crushed stone may be better. Concrete on clean sound rock gets the maximum friction factor in the table, 0.70, and 35 deg for delta. SteelPE (Structural) (OP) 24 Jun 09 …
Permeability of #57 stone - Storm/Flood engineering - Eng-Tips
网页2012年12月11日 · GeoPaveTraffic (Geotechnical) 19 Dec 12 08:39. #57 stone should be pretty clean with little sand. I would expect a permeability of between 0.1 and 10 cm/sec. Permability will depend on how the material is placed in the trench (i.e. how much contamination is allowed), comapction, and actual gradation. Now to the real question, …
self compacting #57 stone...again?! - Eng-Tips
网页2010年12月10日 · cap4000 (Civil/Environmental) 16 Dec 10 11:18. Take a look at the link below. In Nothern NJ with #57 stone the DRW and Unit Weights simply dumped are around 90% compact +/-. Braen Stone and Eastern Concrete are the suppliers. 89/100 and 88/98. Generally a small walk behind plate compactor is used also to increase the compaction.
Can replace 57 with 4 and not compact? - Eng-Tips
网页2007年7月25日 · run #1: quickly dumped 2 buckets of #57 stone in to 1 bucket and leveled off top--68.88lbs per 5 gal bucket. run #2: slowly dumped in stone in about 6 inch lifts and very very little tapped it down (not beat the heck out of or even remotely close to that). leveled off top--78.32lbs per 5 gal bucket.
Friction angle of crushed rock - Geotechnical engineering general ...
网页2007年9月6日 · The angle of internal friction of a crushed stone will be directly influenced by type of rock and grain size. Forty-one (41) seems to me possible, but dangerous. I would use a safe 36 degrees unless a direct shear test is performed on a sample. There's at-rest earth pressure and active earth pressure.
#57 Stone as Fill - Earthwork/grading engineering - Eng-Tips
网页KAM (Geotechnical) 27 Apr 01 17:59. Our firm often uses #57 stone as backfill beneath footings when soft cohesive soils are removed, and high groundwater conditions exist. The stone layer thickness does not normally exceed 12 inches. If the adjacent soil profile consists of cohesive soils, the possibility of soil washing into voids in the stone ...
Liquid Capacity of Gravel Fill - Water treatment & distribution
网页2002年9月20日 · Specific gravity of most stone is 2.75. The weight of a cubic foot of the stone should weigh about 120 pounds. The volume of air will be about 1/3 cubic foot. If you are using a clean stone graded from 1" to 1/4" you will be fine with storage volume of 1/3. If the stone is contaminated by fines all bets are off.
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