When fresh mortar is wet, it can contain cement, lime, and other materials that may release dust and irritants when disturbed. Inhaling dust from wet or dried mortar can be harmful to your lungs.
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Wet Mortar: While wet, mortar should not emit significant dust; however, if you are mixing it, there might be some exposure to dust, especially if you're using powdered materials.
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Dried Mortar: Once dried, mortar can create dust when it is disturbed, such as during demolition or renovation work. Cement dust can cause issues like respiratory irritation or, with long-term exposure, more serious conditions.
If you're working with mortar, it’s a good idea to wear appropriate personal protective equipment, including a mask or respirator, especially when mixing or handling dry materials to minimize dust inhalation. Also, ensure adequate ventilation when working with these materials.