| 摘要 |
PURPOSE:To prevent cracks from forming, provide slight water absorption, improve water repellency and inhibit efflorescence, etc., of products by using a calcareous aqueous solution in place of water and preferably further a reaction agent reactive with the efflorescent component in producing a hydraulic substance. CONSTITUTION:A hydraulic substance such as mortar or concrete is produced. In the process, an aqueous solution of calcium hydroxide or a calcareous aqueous solution such as eluate of an efflorescent component consisting essentially thereof is used in place of water. Furthermore, a reaction agent (e.g. potassium stearate) such as silica-based or stearic acid-based agent reactive with the efflorescent component is preferably added to produce an unhardened hydraulic substance, which is then subjected to air-dried curing, steam curing, curing with water droplets using an ultrasonic humidifier, autoclave curing, etc., and hardened to produce the hydraulic substance. |
