how to calculate quantity of cement in concrete?
There are hundreds, maybe thousands of recipes for concrete. Your typical ingredients include: -Water -Cement -Aggregate Standard concrete may be assumed as 150 pcf, and a decent baseline to go by is that you will need one pound of water to every four pounds of cement. In the field this is typically a bit higher to enhance the ease of mixing. Your question is very broad - are any other parameters indicated?
The Portland Cement Association's Design and Control of Concrete Mixtures is a definitive book on the subject. It can be purchased at the first link below. The second link is to a web page at Union College, which contains a tutorial on concrete mix design.
You have two ways to determine the amount of cement in a concrete. 1. From the concrete mix design. The mix design contains the amount of cement, as well as the sand, stone, and admixtures, used in a concrete. You also can get the amount of cement from the batch tickets. If you luck out, a few concrete plants use batch tickets as delivery tickets and you may find it there. However, batch tickets and delivery tickets are typically different. 2. Perform a chemical analysis on the concrete. Take a couple of cores and send then to an experienced forensic concrete testing lab. By using chemistry and compression strength of the cores, the cement content of a concrete sample can be determined. Cheers and good luck!
