Have this Sakrete Type I-II Portland Cement Concrete Mix delivered to your job site. Create custom concrete mixes for both concrete slabs or for repairs where the concrete will be at least two 51 mm thick. Use for custom mortars where adjusting the portland to lime ratio allows for both higher or lower strengths. Meets ASTM c 150 for oortland cement. Use where 2 in. thickness or more is needed. For mixing concrete: mix 1 part portland cement, 2 parts coarse sand and 3 parts aggregate. Mixing mortar: mix 1 parts portland cement, 1/4 part lime and 3 parts mason sand. Thicknesses less than two 51 mm and toppings, use: 1 part of portland cement with 3 to 4 parts of concrete sand or general purpose sand.