How do I make a small batch of concrete for various jobs around the house?
A good rule of thumb for small batches of concrete is: 1 part portland cement, 2 parts sand, 3 parts gravel and just enough water to make it workable (not soupy). Be careful to protect your skin from the wet concrete as it is a strong base that will cause alkali burns. If you get a small amount on your skin, wash it off with soap and water.