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Where can I buy limestone gravel by the sack?

Ken Little
StarNews

Q. Where can I buy limestone gravel by the sack (#57 or #40) in North Carolina.

A. Some area businesses that sell stone products carry granite in those sizes, but a phone survey found only one with #57 limestone gravel: Mike’s Mulch N Stone, at 6512 Carolina Beach Road in Wilmington.

An employee said to bring a five-gallon bucket to put the gravel in. The business does not carry #40 limestone gravel. The business number is (910) 793-9111.

57 Stone is a course aggregate that may be processed from gravels, granites, limestone, dolomite, sandstones, or other naturally occurring hard, sound, durable materials meeting the gradation requirements of Table 1, Section 901-1.4, of the Florida Department of Transportation’s Standard Specification.

57 Stone averages in size from a half-inch to 1-1/2 inch in size, a very versatile size used in concrete, asphalt, septic drain fields, under concrete slabs and backfilling basement walls.

Limestone is graded according to nominal size; smaller numbers indicate a larger particle size and bigger numbers indicate a smaller particle size. A #2 is a 2-1/2 inch nominal size, a #57 is a 1 inch nominal and a #8 is a 3/8 inch nominal.

Sizes larger than 4-6 inches are denoted by specific names, such as Rip-Rap and Gabion Stone.

Crusher run products contain all sizes smaller than their name implies; 1-1/2 inch crusher run contains a maximum particle size of 1-1/2 inch and has about 35 percent smaller than 1/4 inch (or a No. 4).

Sizes 1/4 inch or smaller are referred to by the number of openings per inch; a 1/4 inch is a #4, a 1/40 inch is a #40 and a 1/200 inch is a #200.

Crushed limestone weighs different amounts depending on size and amount of compaction. Typical densities are given as in place densities.

Regional suppliers are best reached during business hours Monday through Friday. A list of potential suppliers can be found by going to www.yellowpages.com and searching for “gravel.”

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