| 摘要 |
A method of producing and curing a hydraulic substance and a curing chamber and a paint used in this method in order to prevent cracking of a hardened article and making the same difficultly water-absorbent and highly strong by controlling the formation of an efflorescent component in the step of hardening the hydraulic substance. The method of production comprises using an aqueous solution of lime instead of water to retard the evaporation of water to thereby form dense CaCO3, thus giving a hardened article having a reduced water-absorbency and an increased strength. The method of curing is characterized by conducting the curing while suppressing the evaporation of water or making up for water lost in the step of hardening. Examples of the method include one which comprises conducting curing through, e.g., air drying and supplying water to the surface of the hydraulic substance as soon as it will not be disintegrated by water or the like, and one which comprises injecting at least one member selected from among a fluid which reacts with an efflorescent component, an aqueous solution of lime and a synthetic resin emulsion containing a reactant into the hardened hydraulic substance. The curing chamber includes one provided with a ceiling heater to prevent dewing and one provided with a steam generator, a temperature sensor, a temperature setting device, a temperature control unit, and so forth. The paint comprises a cement slurry and/or a synthetic resin emulsion and a reactant or a colorant and serves to prevent the occurrence of efflorescence. |
