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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Application filed by Mitsubishi Heavy Industries LtdfiledCriticalMitsubishi Heavy Industries Ltd
Priority to JP20782787ApriorityCriticalpatent/JPS6452924A/en
Publication of JPS6452924ApublicationCriticalpatent/JPS6452924A/en
Aftertreatments Of Artificial And Natural Stones
(AREA)
Abstract
PURPOSE:To easily and exactly chip the surface layer of base concrete by a method in which base concrete is placed to a limit level, immediately after the beginning of concrete setting, grooves are formed to a given chipping depth from the limit level, and after the concrete hardens chipping operation is performed. CONSTITUTION:Base concrete 1 is placed to a limit level, and immediately after the beginning of setting of the concrete, grooves 7 of a square form are formed by a tool 4 such as knife. At a time when the concrete 1 has a given strength, chipping is performed along the grooves 7. The chipping operation can thus be performed exactly to a given depth with less amount of labor without damaging the base concrete 1.
JP20782787A1987-08-211987-08-21Chipping of surface layer of base concrete
PendingJPS6452924A
(en)
Method for the continuous production of shaped articles, in particular slabs, from a mix of plaster of paris, and fibre materials as well as a device for carrying out the method