AASHTO #57 stone as defined by quarries, state agencies, etc. is an open-graded, self-compacting 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. This is particularly important when using #57 stone under Flexi-Pave surfaces.
This is an excerpt of the official AASHTO Gradations page. The numbers shown are representative of percentages of a sample of stone which will pass through an opening the size of which is defined in the above row.
* Gradation Numbers 24, 25, 3, 4A, and 4 are main line ballast materials * Gradation Numbers 5 and 57 are yard ballast materials. 2. Old Pa # = The old Pennsylvania Department of Transportation reference to aggregate sizing. 3.
Gradation Charts. The charts below show typical gradations of various products based on required specifications from agencies and organizations such as state DOTs, AASHTO, etc. Anti-Skid . Coarse Aggregates. Fine Aggregates. Micro-Surfacing. Rip Rap
Dec 15, 2003· I believe the Pennsylvania Department of Transportation's Standard Highway Specifications, Publication 408, are availe on line. AASHTO 57 stone was listed in the section on coarse aggregates. The gradations are also given for AASHTO No. 1, 3, 5, 67, 7, 8, and 10 coarse aggregate.
Gradation of stone and rock is found by ASTM C136, the Test Method for Sieve Analysis of Fine and Coarse Aggregates. Gage numbers are used to identify aggregate. ASTM No. 57 aggregate is found using a 1.5-inch sieve, through which all of the stones will pass. No ASTM 57 aggregate stone is smaller than a No. 8 seize with a 0.0937-inch sieve.
Oct 17, 2019· Common Uses for #57 Stone #57 stone is one of the most commonly used types of crushed stone due to its versatility. It is ideal for a variety of projects. It is used as aggregate in concrete. It s well as a base for building sidewalks, asphalt roads, driveways, and railroad ballast.
The AASHTO system ranks specs according to size (1-10), with 1 being the largest (all material must pass a 4” sieve) and 10 being the smallest (all material passing a 3/8” sieve). Multi-digit specs represent a blend of one or more of the ten basic specs (i.e. AASHTO 57 is a blend of AASHTO 5 and AASHTO 7).
Dec 15, 2003· I believe the Pennsylvania Department of Transportation's Standard Highway Specifications, Publication 408, are availe on line. AASHTO 57 stone was listed in the section on coarse aggregates. The gradations are also given for AASHTO No.
AASHTO #57 Stone Specs AASHTO #57 stone as defined by quarries, state agencies, etc. is an open-graded, self-compacting aggregate blend of size 5, 6, & 7 stone. Chat Online Aggregate Gradation Optimization Literature
Besides Soil Classification on other criteria, the AASHTO Soil Classification System classifies soils into seven primary groups, named A-1 through A-7, based on their relative expected quality for road embankments, sub-grades, sub-bases, and bases.Some of the groups are in turn divided into subgroups, such as A-1-a and A-1-b.Furthermore, a Group Index may be calculated to quantify a soil’s