水是一种不定形的建筑材料,无论是水泥、石灰、石膏等胶凝材料的水化或建筑施工中的种种湿作业都离不开水。要科学地用水,就必须掌握水的特性及水分子的运动规律。水是一种氢氧化合物,分子式为H 2 O。它的分子形状很象弯弯腰的大米粒,分子结构是两端分别带有正负电荷的极性分子。水体是等离 Water is an amorphous building material. Whether it is the hydration of cementitious materials such as cement, lime, and gypsum, or the wet work in construction, water is inseparable from water. To use water scientifically, one must master the characteristics of water and the laws of movement of water molecules. Water is an oxyhydroxide with the formula H2O. Its molecular shape is very much like a bent rice grain. The molecular structure is polar molecules with positive and negative charges at both ends. The water body is estranged