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A platform for research: civil engineering, architecture and urbanism
High-strength and high-ductility concrete as well as preparation method and application thereof
The invention discloses high-strength and high-ductility concrete as well as a preparation method and application thereof. The concrete is prepared from 40 to 52 parts of Portland cement, 3.5 to 6 parts of silica fume, 18 to 25 parts of fine aggregate, 0.9 to 1.5 parts of modified steel fiber, 0.75 to 1 part of organic fiber, 0.08 to 0.13 part of water reducing agent and 16 to 30 parts of water. The preparation method of the modified steel fiber comprises the following steps: (1) heating the steel fiber in a protective atmosphere to a two-phase region for heat preservation, then quenching to a bainite region for heat preservation, and finally, water-cooling the obtained steel fiber to room temperature to obtain the modified steel fiber. And (2) spraying a mixed solution formed by a liquid film-forming agent and gypsum micro powder on the steel fiber finally obtained in the step (1) for coating, and then drying to obtain the modified steel fiber. The modified steel fibers and the organic fibers are adopted, so that the problems that the binding force between the organic fibers and a concrete matrix in the high-ductility concrete is insufficient and the crack resistance of the concrete is limited to be improved by the organic fibers are solved.
本发明公开一种高强高延性混凝土及其制备方法与应用，该混凝土包括：硅酸盐水泥40～52份、硅灰3.5～6份、细骨料18～25份、改性钢纤维0.9～1.5份、有机纤维0.75～1份、减水剂0.08～0.13份、水16～30份。所述改性钢纤维的制备包括：(1)将钢纤维在保护气氛中加热至两相区保温，完成后淬火至贝氏体区保温，最后将得到的钢纤维水冷至室温，即得。(2)将液态成膜剂与石膏微粉形成的混合液喷洒在步骤(1)最后得到的钢纤维上进行包覆，完成后进行干燥，即得改性钢纤维。本发明采用改性的钢纤维和有机纤维克服了高延性混凝土中有机纤维与混凝土基体结合力不足以及有机纤维对混凝土的抗裂性提升有限的问题。
High-strength and high-ductility concrete as well as preparation method and application thereof
The invention discloses high-strength and high-ductility concrete as well as a preparation method and application thereof. The concrete is prepared from 40 to 52 parts of Portland cement, 3.5 to 6 parts of silica fume, 18 to 25 parts of fine aggregate, 0.9 to 1.5 parts of modified steel fiber, 0.75 to 1 part of organic fiber, 0.08 to 0.13 part of water reducing agent and 16 to 30 parts of water. The preparation method of the modified steel fiber comprises the following steps: (1) heating the steel fiber in a protective atmosphere to a two-phase region for heat preservation, then quenching to a bainite region for heat preservation, and finally, water-cooling the obtained steel fiber to room temperature to obtain the modified steel fiber. And (2) spraying a mixed solution formed by a liquid film-forming agent and gypsum micro powder on the steel fiber finally obtained in the step (1) for coating, and then drying to obtain the modified steel fiber. The modified steel fibers and the organic fibers are adopted, so that the problems that the binding force between the organic fibers and a concrete matrix in the high-ductility concrete is insufficient and the crack resistance of the concrete is limited to be improved by the organic fibers are solved.
本发明公开一种高强高延性混凝土及其制备方法与应用，该混凝土包括：硅酸盐水泥40～52份、硅灰3.5～6份、细骨料18～25份、改性钢纤维0.9～1.5份、有机纤维0.75～1份、减水剂0.08～0.13份、水16～30份。所述改性钢纤维的制备包括：(1)将钢纤维在保护气氛中加热至两相区保温，完成后淬火至贝氏体区保温，最后将得到的钢纤维水冷至室温，即得。(2)将液态成膜剂与石膏微粉形成的混合液喷洒在步骤(1)最后得到的钢纤维上进行包覆，完成后进行干燥，即得改性钢纤维。本发明采用改性的钢纤维和有机纤维克服了高延性混凝土中有机纤维与混凝土基体结合力不足以及有机纤维对混凝土的抗裂性提升有限的问题。
High-strength and high-ductility concrete as well as preparation method and application thereof
一种高强高延性混凝土及其制备方法与应用
SUN HAO (author) / LIU WANGANG (author) / LI LIANG (author) / YU LINYU (author) / YAN JIAJIANG (author) / LU HAO (author) / WANG RENXIAO (author) / LIANG JINPENG (author)
2023-09-22
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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