By definition crushed stone is a construction aggregate. It is created by mining a suitable rock formation and then using a crusher to break down the stone into different sizes. Crushed stone differs from gravel in that gravel has a more rounded shape and is made by the natural processes of weathering and erosion.
For over a century, Dolese Bros. Co. has provided the aggregates, concrete, and products used to build the world around us. The company’s dedication to service and quality has helped it grow from humble beginnings to a three-state 1,000-employee operation.
The aggregate shall consist of hard, durable particles of crushed stone or crushed gravel and a filler of natural sand, stone sand or other finely divided mineral matter. Over-sized material, encountered in deposit, from which the material is taken shall be removed by screening or shall be crushed to the required sizes.
A. Furnish screenings for No. 10 size gravel, stone, or air-cooled slag. Where crushed material is specified, ensure that it is crushed from material larger than the 1/2-inch (12.5 mm) sieve.
It should be constructed of a hard, angular crushed stone screening installed directly on top of the sub-base. This stone screening layer should be a minimum of 3” thick after compaction and be placed level so that the finished elevations do not vary more then ¼” in 10’ when measured in any direction.
AASHTO, the American Association of State Highway and Transportation Officials, specifies many standard sizes of crushed stone used by many state DOTs. They are specified by numbers, such as #1, #2, #57, #9, etc. but are very different from screen size specifications openings per inch mentioned above. Typical uses for AASHTO sizes are:
Screenings are mostly use as a paver base material for Patio Stone, Pavers, Clay Brick and Flagstone. Screenings are also used to make Concrete Block , Concrete Pavers Etc… When considering which Screening to use it is helpful to know how each one performs.