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Achinery cement concentrating

Building Materials Equipment - Laitance is a weak milky accumulation of fine particles of cement dust lime and sand fines on the surface of fresh concrete usually caused by an excess of water bleeding to the surface What Is Etching Concrete Acid etching is the process of applying hydrochloricmuriatic or buffered phosphoric acid to a slab then rinsing it off with water For many years it was a standard method of concrete preparation

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