How much chert do you need?
Enter the size of your country lane, pad or fill area. You get cubic yards, tons and truck loads of chert, a rocky fill that packs hard.
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How this was worked out
Assumes chert at 1.35 tons per cubic yard. Soil weighs more or less with its mix and the water in it, so ask your supplier for their number.
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About chert
Chert is a hard, glassy rock dug from pits in hill country, often red, brown or tan with clay mixed through it. For generations it has been the local road rock on farm lanes and county roads in parts of the South. It is a rocky compactable fill: with its clay, it packs hard when damp and rolled.
Also called compactable fill.
More about chert
Chert breaks into sharp, flat-sided pieces and is harder than limestone, though it often arrives as a soft-looking mix of rock and colored clay straight from the pit. Some areas call it pit rock or compactable fill, and loads vary from one pit to the next.
Spread it 4 to 6 inches thick, wet it if it is dry, and roll it, or let loaded trucks do the work over a few weeks. Crown the lane so water runs off the sides, since standing water softens the clay. It also makes a sound layer under crusher run where a pit is close by.
Too much clay turns it slick in a wet spell and dusty in a dry one, so ask for a load with more rock than clay. The clay holds water, and a load hauled after rain can run noticeably over the dry figure. Chert dust also stains concrete and siding a rusty color, so keep a fresh load off a new slab and hose any spill off siding before it dries.