A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Low-shrinkage high-cohesiveness repair concrete as well as preparation method and application thereof
The invention provides low-shrinkage high-cohesiveness repair concrete as well as a preparation method and application thereof. The low-shrinkage high-cohesiveness repair concrete comprises the following components: 280-340 parts of cement; 710 to 780 parts of sand, namely fine aggregate; the stone is 950-1050 parts of coarse aggregate; 60 to 90 parts of fly ash; 30 to 70 parts of mineral powder; 12-18 parts of an expanding agent; 140 to 160 parts of water; 8-10 parts of a water reducing agent; 0.8 to 1.2 parts of polypropylene fiber; 2 to 4 parts of basalt fiber and 0.6 to 1 part of nano cellulose. The shrinkage coefficient of the cement can be reduced through a proper amount of polypropylene fiber and basalt fiber, the loss of water in the mixing process is reduced, and meanwhile, due to the hydrophilicity and hygroscopicity of nano cellulose, the originally absorbed water is released along with the change of time, so that the loss of water in the concrete is supplemented; the basalt fibers with high elastic modulus play a role in the later period of crack cracking, and cracking of the cracks in the later period at the repaired position is avoided; according to the invention, the macroscopic fiber and the nano cellulose have a good synergistic effect, and the macroscopic-nano multi-scale reduction and enhancement effects are realized.
本发明提出了一种低收缩高粘结性修补混凝土及其制备方法和应用，包括如下组分：水泥280‑340份；砂即细骨料710‑780份；石子即粗骨料950‑1050份；粉煤灰60‑90份；矿粉30‑70份；膨胀剂12‑18份；水为140‑160份；减水剂8‑10份；聚丙烯纤维0.8‑1.2份；玄武岩纤维2‑4份，纳米纤维素0.6‑1份。本发明中通过适量的聚丙烯纤维和玄武岩纤维能够降低水泥的收缩系数，减少混合过程中水分的流失，同时纳米纤维素的亲水性和吸湿性，原本吸收的水分随时间变化而释放，从而补充了混凝土内部水分的散失；本发明通过较高弹性模量的玄武岩纤维在裂缝开裂后期发挥作用，避免修补处在后期裂缝产生开裂；本发明宏观纤维与纳米纤维素起到了较好的协同效应，实现了宏观‑纳观多尺度减缩和增强效果。
Low-shrinkage high-cohesiveness repair concrete as well as preparation method and application thereof
The invention provides low-shrinkage high-cohesiveness repair concrete as well as a preparation method and application thereof. The low-shrinkage high-cohesiveness repair concrete comprises the following components: 280-340 parts of cement; 710 to 780 parts of sand, namely fine aggregate; the stone is 950-1050 parts of coarse aggregate; 60 to 90 parts of fly ash; 30 to 70 parts of mineral powder; 12-18 parts of an expanding agent; 140 to 160 parts of water; 8-10 parts of a water reducing agent; 0.8 to 1.2 parts of polypropylene fiber; 2 to 4 parts of basalt fiber and 0.6 to 1 part of nano cellulose. The shrinkage coefficient of the cement can be reduced through a proper amount of polypropylene fiber and basalt fiber, the loss of water in the mixing process is reduced, and meanwhile, due to the hydrophilicity and hygroscopicity of nano cellulose, the originally absorbed water is released along with the change of time, so that the loss of water in the concrete is supplemented; the basalt fibers with high elastic modulus play a role in the later period of crack cracking, and cracking of the cracks in the later period at the repaired position is avoided; according to the invention, the macroscopic fiber and the nano cellulose have a good synergistic effect, and the macroscopic-nano multi-scale reduction and enhancement effects are realized.
本发明提出了一种低收缩高粘结性修补混凝土及其制备方法和应用，包括如下组分：水泥280‑340份；砂即细骨料710‑780份；石子即粗骨料950‑1050份；粉煤灰60‑90份；矿粉30‑70份；膨胀剂12‑18份；水为140‑160份；减水剂8‑10份；聚丙烯纤维0.8‑1.2份；玄武岩纤维2‑4份，纳米纤维素0.6‑1份。本发明中通过适量的聚丙烯纤维和玄武岩纤维能够降低水泥的收缩系数，减少混合过程中水分的流失，同时纳米纤维素的亲水性和吸湿性，原本吸收的水分随时间变化而释放，从而补充了混凝土内部水分的散失；本发明通过较高弹性模量的玄武岩纤维在裂缝开裂后期发挥作用，避免修补处在后期裂缝产生开裂；本发明宏观纤维与纳米纤维素起到了较好的协同效应，实现了宏观‑纳观多尺度减缩和增强效果。
Low-shrinkage high-cohesiveness repair concrete as well as preparation method and application thereof
一种低收缩高粘结性修补混凝土及其制备方法和应用
WU JINGJIANG (author) / GAO XIAOBO (author) / GUO JINJUN (author) / WANG JUAN (author) / JUNG WON HOON (author) / ZHANG PENG (author) / YUAN WEI (author) / ZHANG YONG (author) / HU LIANCHAO (author) / QI DONGHUI (author)
2024-06-18
Patent
Electronic Resource
Chinese
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