Which Cement for Which Job?

If the soil or groundwater contains sulfates, concrete made with ordinary cement is damaged. In this case Type 2 cement is recommended, and Type 5 cement for soils with high sulfate content. A soil test shows which is needed.

For columns, beams and slabs under normal conditions, Type 1 or Type 2 cement is used. In mass concrete, a cement that releases less heat, such as Type 2, reduces the risk of thermal cracking.

Portland limestone cement or Type 1 is suitable for this work. Portland limestone cement gives a smooth, workable mortar.

In humid environments, near the sea or in contact with salt water, the quality of concrete work matters as much as a sulfate-resistant cement: a low water to cement ratio, proper compaction and correct curing.