Limestone base is produced from solid rock. It is blasted, crushed and screened to ultimately arrive at a product which is a mixture of 1 ¾ inch stones down to microscopic particles and every size in between. This is referred to as being "well graded". The well graded property of the material is so that the progressively smaller stones in the mix fill the voids between the larger stones, ultimately resulting in a dense, impervious layer when compacted. This dense layer serves to seal out water while retaining some flexibility. The flexible nature of the material serves to enhance the durability of the in-place product. Limestone base works best when installed over a well-draining and compacted sub surface. Lime or cement stabilization of the sub surface enhances the stability of the finished product. Limestone base is used as a subbase for asphalt pavement such as highways, secondary roads and parking lots, as well as a compacted material for unpaved uses such as driveways, oil field roads, ranch roads, county roads and similar applications.
Tech Specs Grade 1
Liquid Limit maximum 35 Plasticity Index maximum 10 Wet Ball Mill % maximum 40 Sieve Size Percent Retained 1-3/4 inch 0% 7/8 inch 10-35% 3/8 inch 30-50% No. 4 45-65% No. 40 70-85%
Tech Specs Grade 2
Liquid Limit maximum 35 Plasticity Index maximum 12 Wet Ball Mill % maximum 47 Sieve Size Percent Retained 2-1/2 inch 0% 1-3/4 inch 0-10% No. 4 45-75% No. 40 60-85%
Tech Specs Grade 3
Liquid Limit maximum 35 Plasticity Index maximum 10 Sieve Size Percent Retained 2-1/2 inch 0% 1-3/4 inch 0-10% No. 4 45-75% No. 40 50-85%