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AssigneeNippon Shokubai Co., Ltd.
InventorsKouichi Okamoto, Yoshihiko Masuda, Kenji Kadonaga, Yohei Murakami, Akira Hattori
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To prevent adhesion of a support body and a hardened body of a hydraulic composition, the hydraulic composition being used for a soil structure such as a retaining wall built in a soil excavating work in the civil engineering and construction fields, a composition (A) composed of at least an alkaline-water-soluble resin with an acid value of not less than 15 mgKOH/g and a water-absorbent material is provided so as to intervene between the support body and the hardened body of the hydraulic composition, either by applying the composition (A) on a surface of the support body, or by covering the support body with a sheet-like member on which the composition (A) is applied. The alkaline-water-soluble resin dissolves in alkaline water upon contact with the same contained in the hydraulic composition. As the alkaline-water-soluble resin dissolves, the water-absorbent material swells absorbing the alkaline water, whereby a layer of the water-absorbent material which has swollen is formed between the hardened body of the hydraulic composition and the support body, preventing the adhesion therebetween.
An adhesion preventing method for preventing adhesion of a hardened body of a hydraulic composition and a support body, the support body being intended to support the hardened body of the hydraulic composition from the inside or outside the same at least while the hydraulic composition is being hardened, said method comprising the step of:
A support body, wherein a composition (A) composed of an alkaline-water-soluble resin with an acid value of not less than 15 mgKOH/g and not more than 500 mgKOH/g, and a water-absorbent material is applied to at least a part of said support body.
A sheet-like member, wherein a composition (A) composed of an alkaline-water-soluble resin with an acid value of not less than 15 mgKOH/g and not more than 500 mgKOH/g, and a water-absorbent material is applied to at least a part of said sheet-like member.
A support body extracting method for extracting a support body out of a cement composition after the cement composition is hardened, the support body being intended to support the hardened body of the cement composition from inside the same at least while the cement composition is being hardened, the cement composition being used for soil structure which is built in foundation constructing works in the civil engineering and construction fields, said method comprising the steps of:
Dependencies are inferred from the claim text.