A cubic foot of coal pieces weighs between 40 and 60 pounds. A solid cubic foot of coal can weight up to 84 pouinds. A coal hopper rail car contains 100 tons of coal. I hate you gety a book from quezboy.
As long as your walkway isn't cracked all the way through, you can coat the slab with a concrete resurfacer, a no-shrink blend of Portland cement, sand, and polymer additives that fills divots and makes a uniform finish. Its natural color is dark gray, so buy enough to cover your entire walk. One 40-pound bag coats about 35 square feet. If you want a different color, just add a concrete tint. Before resurfacing, strip off any paint or sealers and watch the weather. Temperatures should remain above 50 degrees F for 8 hours after the pour and above freezing for 24 hours after that.
This video shows you how to resurface, restore, repair, renew and refinish your worn concrete surfaces with QUIKRETEÂ® Concrete Resurfacer, using a brush, trowel or squeegee and Concrete Resurfacer.