A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fiber and electromagnetic induction microcapsule self-repairing concrete and preparation method thereof
The invention relates to fiber and electromagnetic induction microcapsule self-repairing concrete and a preparation method thereof. The preparation method comprises the following steps: firstly, blending and twisting aramid fibers and polyvinyl alcohol (PVA) fibers into multi-strand yarns, soaking the multi-strand yarns in epoxy resin E-135, and curing the multi-strand yarns with compound amine to form blended fibers; then coating acrylic ester with hydroxy propyl cellulose (HPMC) and gamma-Fe2O3 nanoparticles as wall materials to form electromagnetic induction microcapsules, uniformly stirring the electromagnetic induction microcapsules with the concrete slurry, and finally uniformly doping the blend fibers into the concrete slurry and pouring the concrete slurry into a mold. When microcracks are generated in the concrete, the fibers bear part of tensile stress and guide the cracks to diffuse along the surface of the fibers, so that the crack propagation speed is slowed down, and the overall toughness of the concrete is improved. When the microcracks in the concrete further expand into cracks, an external magnetic field is introduced, the microcapsules are heated and melted through electromagnetic induction, the healing agent is released, and the purpose of repairing the cracks in the concrete is achieved.
本发明涉及一种纤维及电磁感应微胶囊自修复混凝土及其制备方法。本发明首先将芳纶纤维与聚乙烯醇(PVA)纤维进行混纺并加捻为多股线，经过环氧树脂E‑135浸泡、复合胺固化后形成混纺纤维。然后使用羟丙基纤维素(HPMC)和γ‑Fe2O3纳米颗粒作为壁材包覆丙烯酸酯构成电磁感应微胶囊，并与混凝土浆料搅拌均匀，最后将混纺纤维均匀掺入上述混凝土浆料内并浇筑于模具中。当混凝土内部产生微裂纹时，纤维承担部分拉伸应力并引导裂纹沿着其表面扩散，从而减缓裂纹扩展的速度，提高混凝土的整体韧性。当混凝土内部的微裂纹进一步扩展为裂缝时，此时引入外部磁场通过电磁感应加热融化微胶囊并释放愈合剂达到修复混凝土内部裂缝的目的。
Fiber and electromagnetic induction microcapsule self-repairing concrete and preparation method thereof
The invention relates to fiber and electromagnetic induction microcapsule self-repairing concrete and a preparation method thereof. The preparation method comprises the following steps: firstly, blending and twisting aramid fibers and polyvinyl alcohol (PVA) fibers into multi-strand yarns, soaking the multi-strand yarns in epoxy resin E-135, and curing the multi-strand yarns with compound amine to form blended fibers; then coating acrylic ester with hydroxy propyl cellulose (HPMC) and gamma-Fe2O3 nanoparticles as wall materials to form electromagnetic induction microcapsules, uniformly stirring the electromagnetic induction microcapsules with the concrete slurry, and finally uniformly doping the blend fibers into the concrete slurry and pouring the concrete slurry into a mold. When microcracks are generated in the concrete, the fibers bear part of tensile stress and guide the cracks to diffuse along the surface of the fibers, so that the crack propagation speed is slowed down, and the overall toughness of the concrete is improved. When the microcracks in the concrete further expand into cracks, an external magnetic field is introduced, the microcapsules are heated and melted through electromagnetic induction, the healing agent is released, and the purpose of repairing the cracks in the concrete is achieved.
本发明涉及一种纤维及电磁感应微胶囊自修复混凝土及其制备方法。本发明首先将芳纶纤维与聚乙烯醇(PVA)纤维进行混纺并加捻为多股线，经过环氧树脂E‑135浸泡、复合胺固化后形成混纺纤维。然后使用羟丙基纤维素(HPMC)和γ‑Fe2O3纳米颗粒作为壁材包覆丙烯酸酯构成电磁感应微胶囊，并与混凝土浆料搅拌均匀，最后将混纺纤维均匀掺入上述混凝土浆料内并浇筑于模具中。当混凝土内部产生微裂纹时，纤维承担部分拉伸应力并引导裂纹沿着其表面扩散，从而减缓裂纹扩展的速度，提高混凝土的整体韧性。当混凝土内部的微裂纹进一步扩展为裂缝时，此时引入外部磁场通过电磁感应加热融化微胶囊并释放愈合剂达到修复混凝土内部裂缝的目的。
Fiber and electromagnetic induction microcapsule self-repairing concrete and preparation method thereof
一种纤维及电磁感应微胶囊自修复混凝土及其制备方法
DU WEI (author) / JIANG LU (author) / DING QINGJUN (author) / DU FEI (author) / LIU BO (author) / ZHANG WEIDONG (author) / XIAO LIHUA (author) / CHEN WEI (author)
2024-11-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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