3 Ways to Make Cement - wikiHow
Add water to the cement powder. Using a garden hose, add a reasonable amount of water to the center of the dry cement powder. Start by adding about 1 gallon (3.8 L) of water. It's best to start out with a smaller amount of water and add more as needed—it's inconvenient to add a second bag of cement if you add to much water to the first batch.