水玻璃是一种优良的胶凝材料,用途很厂。模数及比重是控制水玻璃质量的两个重要指标。当水玻璃模数及比重不符合要求时,可在现场进行调整。如要提高模数,可向水玻璃中加入硅胶、盐酸及非晶形天然二氧化硅。反之,如要降低模数,则加入氢氧化钠。加入硅胶时必须将其磨细至全部通过0.3毫米孔径的筛子,溶于水中,再加入水玻璃内。不要将粉状硅胶直接掺入水玻璃中,不然硅胶结块,甚至加热也无法使其溶解,这样,就难于混合均匀。氢氧化钠也必须使之成为液体加入。至于 Water glass is an excellent cementitious material and its use is very good. Modulus and specific gravity are two important indicators for controlling the quality of water glass. When the water glass module and the specific gravity do not meet the requirements, they can be adjusted on site. To increase the modulus, silica gel, hydrochloric acid, and amorphous natural silica can be added to the water glass. Conversely, if you want to reduce the modulus, add sodium hydroxide. When adding silica gel, it must be ground until it has passed through a sieve with a pore size of 0.3 mm, dissolved in water, and added to water glass. Do not mix powdered silica gel directly into water glass. Otherwise, silica gel cakes, and even heating does not dissolve it. This makes it difficult to mix well. Sodium hydroxide must also be added as a liquid. As for