ABC vs. Gravel
ABC vs. Gravel
(OP)
Easy question; What's the difference between Aggregate Base and gravel? Are there some regional definitions which might further muddy the issue?
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RE: ABC vs. Gravel
f-d
¡papá gordo ain't no madre flaca!
RE: ABC vs. Gravel
An aggregate base would be a particle size grading range that is desired consisting of sand and gravel, mainly with a trace of silt - meeting a particular specification. it may also have requisite properties like PI < 6, maximum particle size of 37.5 mm, LA Abrasion less than 25, etc. Each state or Province have their own - in Ontario, an aggregate base would be called MTC Granular A for example. If the aggregate "base" would be used as a subbase, the range of particle sizes would be somewhat different and not as strict.
RE: ABC vs. Gravel
Agregate base course is generally made of crushed rock and well graded from small to large particles. It compacts well, is very stable, doesn't drain quite as well as gravel. It is probably suitable for road base and structural fills
RE: ABC vs. Gravel
Not sure how this relates to the OP. . .
f-d
¡papá gordo ain't no madre flaca!
RE: ABC vs. Gravel
RE: ABC vs. Gravel
As cvg said gravel is a naturally ocurring material. Depending on the spec, grain size etc. the gravel may be acceptable as a subbase or roadbase material. If it does not meet the spec it may be possible to mix it with another material or even use it as cement stabilised material(CSM)
Aggregate Base Course is crushed rock, it will be run through the crusher to meet the required gradation specification.
Is "pea gravel" gravel? I think this a colloquial term, but to me it is 10mm clean (i.e single sized) crushed rock.
RE: ABC vs. Gravel
RE: ABC vs. Gravel
RE: ABC vs. Gravel
A standard spec for gravel which actually does require rounded natural material but may allow some crushed:
another spec for base materials which prefers crushed but allows natural:
RE: ABC vs. Gravel
RE: ABC vs. Gravel
I have never specified steel slag in over 25 years, but this is a standard agency specification for a very large city and unfortunately this is what we have to use. The good thing is that there is no local supply of slag, so I'm not even sure why it is in the specification...
From now on, I will exclude it as well as decomposed granite. In fact, I am generally only interested in seeing crushed rock on my projects.
RE: ABC vs. Gravel
RE: ABC vs. Gravel
RE: ABC vs. Gravel
f-d
¡papá gordo ain't no madre flaca!
RE: ABC vs. Gravel
RE: ABC vs. Gravel
I once made a friendly jab to a fellow about his quarry not being able to donate their usual 20 tons of gravel to a local charity auction. He then responded that gravel comes from a river pit, and that they sold crushed rock. After that I have been careful in the maintaining the proper distinction between those two items.