A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Blend fiber and nested microcapsule self-repairing concrete and preparation method thereof
The invention relates to blend fiber and nested microcapsule self-repairing concrete and a preparation method thereof. Comprising lower-layer concrete and upper-layer concrete, blend fibers are uniformly doped into the lower-layer concrete, blend fibers and nested microcapsules are doped into the upper-layer concrete, and when microcracks are generated on the surface of the concrete for the first time, the blend fibers can effectively resist propagation of the microcracks, a uniformly dispersed network is formed, loads are shared, and crack propagation is delayed; therefore, the overall toughness of the concrete is improved; when cracks further appear on the surface of the concrete, the outer capsule wall of the nested microcapsule is broken, and MMA is diffused into the cracks and reacts with an initiator in the concrete to heal the cracks; meanwhile, the small-particle-size microcapsules flow out along with the MMA and are dispersed in the concrete; and when the concrete cracks again, the small-particle-size microcapsules at the cracks are broken, so that the cracks are healed. The blend fibers and the nested microcapsules are doped into the concrete, so that toughening of the concrete and repeated self-healing of cracks are realized.
本发明涉及一种混纺纤维及嵌套微胶囊自修复混凝土及其制备方法。包括下层混凝土和上层混凝土，下层混凝土中均匀掺入了混纺纤维，上层混凝土掺入了混纺纤维和嵌套微胶囊，当混凝土表面首次产生微裂纹时，混纺纤维能够有效地抵抗微裂缝的扩展，形成一个均匀分散的网络，分担载荷，延缓裂纹扩展，从而提高了混凝土的整体韧性；混凝土表面进一步出现裂缝时，嵌套微胶囊外层囊壁破裂，MMA扩散到裂缝中，与混凝土中的引发剂反应使裂缝得到愈合；同时小粒径微胶囊伴随MMA流出分散在混凝土中；当混凝土再度出现裂缝时，裂缝处的小粒径微胶囊发生破裂进而使裂缝愈合。将混纺纤维与嵌套微胶囊掺入混凝土实现了对混凝土的增韧及裂缝的多次自愈合。
Blend fiber and nested microcapsule self-repairing concrete and preparation method thereof
The invention relates to blend fiber and nested microcapsule self-repairing concrete and a preparation method thereof. Comprising lower-layer concrete and upper-layer concrete, blend fibers are uniformly doped into the lower-layer concrete, blend fibers and nested microcapsules are doped into the upper-layer concrete, and when microcracks are generated on the surface of the concrete for the first time, the blend fibers can effectively resist propagation of the microcracks, a uniformly dispersed network is formed, loads are shared, and crack propagation is delayed; therefore, the overall toughness of the concrete is improved; when cracks further appear on the surface of the concrete, the outer capsule wall of the nested microcapsule is broken, and MMA is diffused into the cracks and reacts with an initiator in the concrete to heal the cracks; meanwhile, the small-particle-size microcapsules flow out along with the MMA and are dispersed in the concrete; and when the concrete cracks again, the small-particle-size microcapsules at the cracks are broken, so that the cracks are healed. The blend fibers and the nested microcapsules are doped into the concrete, so that toughening of the concrete and repeated self-healing of cracks are realized.
本发明涉及一种混纺纤维及嵌套微胶囊自修复混凝土及其制备方法。包括下层混凝土和上层混凝土，下层混凝土中均匀掺入了混纺纤维，上层混凝土掺入了混纺纤维和嵌套微胶囊，当混凝土表面首次产生微裂纹时，混纺纤维能够有效地抵抗微裂缝的扩展，形成一个均匀分散的网络，分担载荷，延缓裂纹扩展，从而提高了混凝土的整体韧性；混凝土表面进一步出现裂缝时，嵌套微胶囊外层囊壁破裂，MMA扩散到裂缝中，与混凝土中的引发剂反应使裂缝得到愈合；同时小粒径微胶囊伴随MMA流出分散在混凝土中；当混凝土再度出现裂缝时，裂缝处的小粒径微胶囊发生破裂进而使裂缝愈合。将混纺纤维与嵌套微胶囊掺入混凝土实现了对混凝土的增韧及裂缝的多次自愈合。
Blend fiber and nested microcapsule self-repairing concrete and preparation method thereof
一种混纺纤维及嵌套微胶囊自修复混凝土及其制备方法
DU WEI (author) / LIU BO (author) / XIAO LIHUA (author) / JIANG LU (author) / ZHANG CHI (author) / GAN HUILONG (author) / LONG SHAOLEI (author) / YI YANLIANG (author) / HE PENG (author) / WU ANJIE (author)
2024-10-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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