Mortar is made by mixing cement, lime and sand. The proportions of these ingredients vary depending on the type of mortar you're making, but the basic ratio is one part cement to three parts sand.  To mix, you'll need:  Mixing area: wheelbarrow, plastic tub, mixing boardBuilder's shovel/spadeTarpaulin sheetBristle brushBucketAppropriate PPE: a respiratory mask, goggles and gloves