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A platform for research: civil engineering, architecture and urbanism
High-toughness anti-cracking self-repairing concrete and preparation method thereof
The invention relates to high-toughness anti-cracking self-repairing concrete and a preparation method thereof, belongs to the technical field of building materials, and is mainly applied to assembly type prefabricated thin composite floor slabs. The concrete is prepared from the following components in parts by weight: 110 to 150 parts of ordinary Portland cement, 40 to 55 parts of aluminum sulfate cement, 260 to 310 parts of coarse aggregate, 180 to 240 parts of fine aggregate, 15 to 20 parts of ultramicro filler, 12 to 17 parts of modified anti-crack fiber, 1.9 to 2.3 parts of water reducing agent and 50 to 60 parts of water, according to the modified anti-cracking fiber, chopped yarn basalt fiber is used as a matrix, a modified solution is prepared through nitric acid solution etching, activation and substitution reaction of chloropropyltriethoxysilane and iminodiacetic acid, coupling is conducted through calcium hydroxide treatment, a calcium acetate structure is formed on the surface of the fiber for coating, and the modified anti-cracking fiber is formed through combined action of the modified anti-cracking fiber, aluminum sulfate cement and ultra-micro filler. A reinforced transition layer is formed between the fibers and the concrete matrix, so that the bonding strength of the fibers and the concrete matrix is improved, and the anti-cracking effect of the fibers is fully exerted.
本发明涉及一种高韧防开裂自修复混凝土及其制备方法，属于建筑材料技术领域，主要应用于装配式预制薄型叠合楼板。其包括：普通硅酸盐水泥110‑150份、硫酸铝盐水泥40‑55份、粗骨料260‑310份、细骨料180‑240份、超微填料15‑20份、改性抗裂纤维12‑17份、减水剂1.9‑2.3份和水50‑60份；改性抗裂纤维以短切纱玄武岩纤维为基体，通过硝酸溶液刻蚀、活化，以氯丙基三乙氧基硅烷和亚氨基二乙酸取代反应制成改性液，通过氢氧化钙处理进行偶联，在纤维表面形成乙酸钙结构包覆，其与硫酸铝盐水泥和超微填料共同作用，在纤维与混凝土基体间形成强化过渡层，提高纤维与混凝土基体的结合强度，充分发挥纤维的抗裂作用。
High-toughness anti-cracking self-repairing concrete and preparation method thereof
The invention relates to high-toughness anti-cracking self-repairing concrete and a preparation method thereof, belongs to the technical field of building materials, and is mainly applied to assembly type prefabricated thin composite floor slabs. The concrete is prepared from the following components in parts by weight: 110 to 150 parts of ordinary Portland cement, 40 to 55 parts of aluminum sulfate cement, 260 to 310 parts of coarse aggregate, 180 to 240 parts of fine aggregate, 15 to 20 parts of ultramicro filler, 12 to 17 parts of modified anti-crack fiber, 1.9 to 2.3 parts of water reducing agent and 50 to 60 parts of water, according to the modified anti-cracking fiber, chopped yarn basalt fiber is used as a matrix, a modified solution is prepared through nitric acid solution etching, activation and substitution reaction of chloropropyltriethoxysilane and iminodiacetic acid, coupling is conducted through calcium hydroxide treatment, a calcium acetate structure is formed on the surface of the fiber for coating, and the modified anti-cracking fiber is formed through combined action of the modified anti-cracking fiber, aluminum sulfate cement and ultra-micro filler. A reinforced transition layer is formed between the fibers and the concrete matrix, so that the bonding strength of the fibers and the concrete matrix is improved, and the anti-cracking effect of the fibers is fully exerted.
本发明涉及一种高韧防开裂自修复混凝土及其制备方法，属于建筑材料技术领域，主要应用于装配式预制薄型叠合楼板。其包括：普通硅酸盐水泥110‑150份、硫酸铝盐水泥40‑55份、粗骨料260‑310份、细骨料180‑240份、超微填料15‑20份、改性抗裂纤维12‑17份、减水剂1.9‑2.3份和水50‑60份；改性抗裂纤维以短切纱玄武岩纤维为基体，通过硝酸溶液刻蚀、活化，以氯丙基三乙氧基硅烷和亚氨基二乙酸取代反应制成改性液，通过氢氧化钙处理进行偶联，在纤维表面形成乙酸钙结构包覆，其与硫酸铝盐水泥和超微填料共同作用，在纤维与混凝土基体间形成强化过渡层，提高纤维与混凝土基体的结合强度，充分发挥纤维的抗裂作用。
High-toughness anti-cracking self-repairing concrete and preparation method thereof
一种高韧防开裂自修复混凝土及其制备方法
SHU LANGPING (author)
2023-07-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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