Patent ID: 6843242
Filing Date: 2005-01-18
Classification: B28B,C04B

Abstract:
1. Method for repairing and consolidating a substantially parallelpiped, natural stone block, with internal fractures and structural discontinuities communicating with the at least one of six faces of the block, the method comprising the steps of: impregnating the block under vacuum in autoclave with a hardening resin, the resin being poured in a liquid state on a free upper surface of the block after having realised the vacuum state, a lower part of the block and a perimeter thereof being contained in a liquid- and gas-tight housing; preliminarily core-drying the block or heating the block to completely dry the block under vacuum; inserting the resin into the internal fractures and structural discontinuities through a subsequent application of atmospheric pressure that operates as a piston on the fluid resin arranged in a space formed over the free upper surface of the block, the resin being thereby injected into the internal fractures and structural discontinuities of the block below; wherein the method provides a coating around the block, the coating wrapping the block below and along a vertical perimeter thereof and being higher than the block, the coating being spaced from the block with suitable spacers, the spacers being also in the form of a resin-flow permeable fabric, the coating being adapted to form the liquid- and gas-tight housing and to allow the resin to flow against the block, elements composing said coating being mutually connected through a tight seam; and wherein a containment of hydrostatic resin pressures operating from inside the block towards outside the block and a control of resin consumptions are performed by an external formwork composed of the coating held in position by sturdy structures, the structures being secured by screwing or other securing means to a platform for supporting and transporting the block.