Whether the ground floor of a house is suspended or filled, it will include either a solid slab or an oversite layer of concrete laid on compacted hardcore directly on the ground. Both hardcore and soil are potential sources of sulfates and other chemicals harmful to concrete. This programme investigates the hardcore components and soil conditions likely to contain sulfates, explains how concrete is affected by sulfate attack and looks at methods used to prevent such damage.
Sulfate and concrete
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Most of a building’s problems can be traced to moisture. It causes wood to decay, concrete to crack, fungus to grow, metals to corrode, pipes to burst (from the cycle of freezing and thawing), and it damages and discolours interior finishes. Understand moisture and you can prevent damp occuring.