凝霜,通常是指水泥制品中的可溶性碱和盐类,在一定的条件下,经过一系列的物理化学变化,在制品表面析出一层白色的沉淀物质。俗称“析白”。一、析白的成因及分析对于硅酸盐水泥制品来说,析白形成的主要原因是由于干湿循环作用。即水泥制品中溶解于渗透水中的碱和钾钠类盐,形成饱 Gel frost, usually refers to the soluble alkalis and salts in cement products. Under certain conditions, after a series of physical and chemical changes, a white precipitated material precipitates on the surface of the product. Commonly known as “white.” I. Causes and Analysis of Separation White For the Portland cement products, the main reason for the formation of white precipitate is due to the wet-dry cycle. That is, the alkali and potassium sodium salts dissolved in permeate water in cement products form