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.
How many cubic feet are in an acre of land? 1 acre = 43560 square feet   Now, square feet are a unit of Area L x W   Cubic feet are a unit of Volume L x W x H (height)   Since an acre of land is just on the X Y â¦ axis/plane then it is simply 43,560 square feet.