Hydration-expansive crushing cartridge
AssigneeNippon Oil and Fats Co., Ltd.
InventorsTsuneo Kasama, Takao Saito, Makoto Wada
Life of this patent
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Abstract
A hydration-expansive crushing cartridge which is prepared by filling a hydration-expansive crushing agent into a container made of a material which allows the permeation or penetration of water and which can be broken by an external force. The cartridge can be charged into holes bored in a concrete structure, a rock bed or the like to crack it regardless of the positioning or the direction of the bored holes and which has a homogeneous crushing capability.
Claims10
A cartridge adapted to be inserted into a bore hole in a monolithic structure and adapted to expand in said bore hole to cause cracks to be formed in said structure, comprising:
- a closed, elongated, tubular casing, said casing being filled with a hydration-expansive agent which is capable of volumetric expansion caused by hydration thereof, said casing being permeable to water while being impermeable to said agent so that when said casing is immersed in water, the water will permeate into the interior of said casing and will wet said agent to cause hydration and expansion thereof while said agent is retained inside said casing, said casing being made of a frangible material which is capable of being punctured by a thrusting rod so that the mixture of said agent and water will flow to fill the bore hole and said agent will expand therein during hydration of said agent and the expansion pressure of said agent as it undergoes hydration will cause cracking of the monolithic structure.
Dependencies are inferred from the claim text.