第一讲 综述 一、混凝土的组成材料及其作用 普通混凝土是以水泥、水、砂和石子为基本材料,按适当比例配合,经搅拌、成型、养护而得到的人造石材。通常即简称混凝土。上述各种材料适当配合后,经搅拌均匀但尚未凝结硬化的混合料,称为混凝土拌合物。 The first lecture Summary First, the composition of concrete materials and their role Ordinary concrete is cement, water, sand and stones as the basic material, in accordance with the appropriate proportion, the mixing, molding, conservation and obtained artificial stone. Usually referred to as concrete. After the above various materials are properly blended, the uniformly mixed but not coagulated and hardened mixture is called a concrete mixture.