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The "doormat test" detects moisture from concrete slabs without a sub-slab vapor barrier. [citation needed] Inorganic materials, such as metal or polished concrete, do not support mold growth, although surface mold growth is still possible. Significant mold growth requires moisture and food sources and a substrate capable of sustaining growth.
[4]: 178 Moulds can grow on almost any surface and occur where there is a lot of moisture from structural problems such as leaky roofs or high humidity levels. [5] Airborne mold concentrations have the potential to be inhaled and can have health effects. [6] Externally, mortar may crumble, and salt stains may appear on the walls.
Creep and shrinkage of concrete are two physical properties of concrete. The creep of concrete, which originates from the calcium silicate hydrates (C-S-H) in the hardened Portland cement paste (which is the binder of mineral aggregates), is fundamentally different from the creep of metals and polymers.
This species is also psychrophilic, it can grow at temperatures between −10 and −3 °C (14 and 27 °F). [15] Cladosporium cladosporioides occurs outdoor environments year-round with peak spore concentration in the air occurring in summer where levels can range from 2,000 spores up to 50,000 spores per cubic meter of air. [ 16 ]
It and other fungal species could find a favourable environment to grow invasively unnoticed in the depth of surfaces containing very small amount of substrate, posing a risk factor for biodegradation of structural components, as well as a direct threat for crew health. [9] Cutaneous granulomas due to the mold fungus U. chartarum has been ...
Discard all food growing mold. Do not sniff moldy food (to avoid inhaling spores) Clean any surfaces and containers moldy food has touched. Refrigerate all perishables at 40 degrees or lower.