耐酸胶泥是由水玻璃和耐酸水泥调制而成的。国内目前在建筑上常用的水玻璃是钠玻璃,它的化学成份是硅酸(Na2O·nSiO2 ) ,分子式中的n 称为水玻璃模数。模数=SiO2 含量Na2O 含量×Na2O 分子量SiO2 分子量模数越高,粘度越大,可溶性相应下降。平常使用的水玻璃是固体水玻璃的水溶液，波美度大致是24°～48°左右(比重112～115 左右) 。水玻璃具有较好的胶结性能,不燃烧,耐腐蚀,有较高的耐酸能力(除不能抵抗氢氟酸、硅氟酸、300 ℃以上的热磷酸和高级脂肪酸外) ,不耐碱。
Acid resistant cement is made of sodium silicate and acid proof cement. The water glass commonly used in architecture in China is sodium glass. Its chemical composition is silicic acid (Na2O. NSiO2). N in molecular formula is called sodium silicate modulus. The modulus =SiO2 content Na2O content, Na2O molecular weight SiO2 and molecular weight modulus increased, the viscosity increased, and the solubility decreased correspondingly. Ordinary water glass is an aqueous solution of solid sodium silicate, and its average is about 24 ~ 48 degrees (about 112~115). Water glass has good cementing performance, not burning, corrosion resistance, high acid resistance (except for hydrofluoric acid, fluoroacid, hot phosphoric acid above 300 degrees C and high fatty acid), and alkali resistance.