PRODUCTION OF COATED LIGHTWEIGHT CELLULAR CONCRETE PLATE

摘要

PROBLEM TO BE SOLVED: To reduce the space necessary for the work in the production of a lightweight cellular concrete plate having coated surface, decrease the number of operators, save the energy and reduce the cost. SOLUTION: An ALC plate 1 forming a lightweight cellular concrete plate is heated in a heating process 2 to adjust the water-content of the ALC plate 1 and keep the surface temperature to 40-60 deg.C. The surface of the plate is coated in a coating process 3 keeping the above state and left standing for about 3 min in an impregnation process 4. The coating material and water constituting the coating film formed on the surface of the ALC plate 1 are impregnated into the pore formed near the surface of the ALC plate 1 to increase the coating material concentration in the coating film and effect the fixing of the film. At the same time, the heat of the ALC plate 1 is transmitted to the water to evaporate the water. The drying of the coating film is accelerated by the above two factors. Accordingly, the present process enables the rational production of a coated lightweight cellular concrete plate at a reduced cost.