Cement, or Portland cement, is a dry powder made. from limestone and other materials. It is burned in a. kiln and then finely ground. Cement reacts chemically. with water to cause concrete to harden.
There are 43,560 square feet in a acre; this is 4,840 square yards. You can find a conversion calculator at http://www.unitconversion.org/area/acres-to-square-foots-conversion.html Originally, the size of an acre was approximately the amount of land an ox could plow in a day.here are 43,560 square feet in a acre; this is 4,840 square yards. You can find a conversion calculator at http://www.unitconversion.org/area/acres-to-square-foots-conversion.html Originally, the size of an acre was approximately the amount of land an ox could plow in a day.
Acres to square feet area measurement units conversion table shows the most common values for the quick reference. Alternatively, you may use the converters below to convert any other values. 1 Acre = 43 560 Square Feet. Acre is an imperial and US customary system area unit. In metric system, it's replaced by hectare. The abbreviation is ac. Square foot is an imperial and US customary area unit. In metric system, it's replaced by square meters (metres).