A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD FOR PRODUCING CEMENT MOLDED BODY
To provide a method for producing a cement molded body in which the generation of fine cracks is suppressed.SOLUTION: A dispersion liquid obtained by dispersing a cellulose nanofiber and thermoplastic resin particles has water retentivity, has temperature dependency of viscosity, and has high viscosity and adhesiveness at an ordinary temperature, wherein the viscosity decreases to produce fluidity at a high temperature, and the viscosity increases to recover the adhesiveness when it returns to the ordinary temperature. A form 1 is adhered like a film to an inner surface in a state of having fluidity, and a dispersion liquid film 4 formed on the inner surface of the form maintains an adhered state in a state of having adhesiveness. The form having the inner surface adhered with the dispersion liquid film makes a cement composition 6 flow thereinside. The cement composition filled into the form is cured at a high temperature to produce fluidity at the dispersion liquid film at the inner surface of the form, and the dispersion liquid having fluidity produced is infiltrated into a surface part of the cement composition at the inside of the form so as to be mixed. The cement composition mixed with the dispersion liquid at the surface part is hardened and is thereafter de-molded to obtain a cement molded body mixed with the dispersion liquid at the surface part.SELECTED DRAWING: Figure 8
【課題】 微細亀裂の発生が抑制されるセメント成形体の製造法の提供。【解決手段】 セルロースナノファイバーと熱可塑性樹脂粒子を分散媒に分散させた分散液は、保水性があり、また、粘度の温度依存性があって、常温では粘度が高くて粘着性があり、高温になると粘度が下がって流動性が生じ、常温に戻ると粘度が高くなって粘着性が戻るものにする。型枠１は、内面に、分散液を流動性のある状態で膜状に付着し、型枠の内面に形成した分散液膜４は、粘着性のある状態で付着状態を維持する。分散液膜を内面に付着した型枠は、内部にセメント組成物６を流入させる。型枠に充填したセメント組成物は、高温養生し、型枠内面の分散液膜に流動性を生じさせ、流動性が生じた分散液を型枠内部のセメント組成物の表面部に侵入させて混入する。分散液を表面部に混入したセメント組成物は、硬化後、脱型し、表面部に分散液が混入しているセメント成形体を得る。【選択図】 図８
METHOD FOR PRODUCING CEMENT MOLDED BODY
To provide a method for producing a cement molded body in which the generation of fine cracks is suppressed.SOLUTION: A dispersion liquid obtained by dispersing a cellulose nanofiber and thermoplastic resin particles has water retentivity, has temperature dependency of viscosity, and has high viscosity and adhesiveness at an ordinary temperature, wherein the viscosity decreases to produce fluidity at a high temperature, and the viscosity increases to recover the adhesiveness when it returns to the ordinary temperature. A form 1 is adhered like a film to an inner surface in a state of having fluidity, and a dispersion liquid film 4 formed on the inner surface of the form maintains an adhered state in a state of having adhesiveness. The form having the inner surface adhered with the dispersion liquid film makes a cement composition 6 flow thereinside. The cement composition filled into the form is cured at a high temperature to produce fluidity at the dispersion liquid film at the inner surface of the form, and the dispersion liquid having fluidity produced is infiltrated into a surface part of the cement composition at the inside of the form so as to be mixed. The cement composition mixed with the dispersion liquid at the surface part is hardened and is thereafter de-molded to obtain a cement molded body mixed with the dispersion liquid at the surface part.SELECTED DRAWING: Figure 8
【課題】 微細亀裂の発生が抑制されるセメント成形体の製造法の提供。【解決手段】 セルロースナノファイバーと熱可塑性樹脂粒子を分散媒に分散させた分散液は、保水性があり、また、粘度の温度依存性があって、常温では粘度が高くて粘着性があり、高温になると粘度が下がって流動性が生じ、常温に戻ると粘度が高くなって粘着性が戻るものにする。型枠１は、内面に、分散液を流動性のある状態で膜状に付着し、型枠の内面に形成した分散液膜４は、粘着性のある状態で付着状態を維持する。分散液膜を内面に付着した型枠は、内部にセメント組成物６を流入させる。型枠に充填したセメント組成物は、高温養生し、型枠内面の分散液膜に流動性を生じさせ、流動性が生じた分散液を型枠内部のセメント組成物の表面部に侵入させて混入する。分散液を表面部に混入したセメント組成物は、硬化後、脱型し、表面部に分散液が混入しているセメント成形体を得る。【選択図】 図８
METHOD FOR PRODUCING CEMENT MOLDED BODY
セメント成形体の製造法
TANAHASHI HAJIME (author) / KONDO HIDEKI (author) / MIZUNO KATSUKI (author) / ASAKURA SHUICHI (author)
2022-07-29
Patent
Electronic Resource
Japanese
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