Method and apparatus for cutting concrete by use of laser
First Claim
1. A method for cutting concrete by the use of a laser, which comprises the steps of moving a laser along the part of the concrete under treatment while directing the laser beam therefrom to said part, supplying a supplementary material rich in MgO to the part of the concrete melted by said laser beam, and performing the work of gouging, breaking, or cutting, for example, on the concrete by utilizing the melted part thereof.
1 Assignment
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Accused Products
Abstract
The slag formed when concrete is melted by exposure to a laser beam, when caused to incorporate therein a MgO-rich supplementary material, loses it viscosity and, on cooling, refrains from expanding and, consequently, assumes a readily removable state. The slag thus set can be easily removed by allowing a cleaning device such as the rotary wire brush to pass along the part of concrete melted by the laser beam. In accordance with this method, the apparatus for cutting concrete can be readily applied to a remote control system and will manifest an outstanding effect in a highly hazardous site such as is involved in the dismantling of a biological shield wall of concrete in a nuclear reactor.
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Citations
14 Claims
- 1. A method for cutting concrete by the use of a laser, which comprises the steps of moving a laser along the part of the concrete under treatment while directing the laser beam therefrom to said part, supplying a supplementary material rich in MgO to the part of the concrete melted by said laser beam, and performing the work of gouging, breaking, or cutting, for example, on the concrete by utilizing the melted part thereof.
- 7. An apparatus for cutting concrete, comprising a frame movable along the part of the concrete under treatment, laser device having fastened to said frame an irradiation part capable of generating a laser beam and irradiating said part of concrete with said laser beam, supplementary material supplying means fixed to said frame near said laser device and adapted to supply a supplementary material rich in MgO to the part of the concrete melted by exposure to said laser beam, and cleaning means fixed to said frame moved along the part of the concrete under treatment as separated rearwardly from said supplementary material supplying means relative to the direction of movement of said frame and adapted to remove slag melted out of the concrete by exposure to said laser beam and subsequently allowed to set.
Specification