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A platform for research: civil engineering, architecture and urbanism
Self-repairing particle, self-repairing cement-based composite material and preparation method thereof
The invention discloses a self-repairing particle, a self-repairing cement-based composite material and a preparation method thereof, the self-repairing particle comprises an inner core, a waterproof layer and a shell; the waterproof layer is a resin film and wraps the outer surface of the inner core material; the shell is a cement shell; the inner core is prepared from the following components in parts by mass: 5-7 parts of sodium carbonate, 1-3 parts of silica fume, 1-3 parts of silicon dioxide, 5-7 parts of quick lime, 1-2 parts of a magnesium oxide expanding agent and 1-2 parts of bentonite. When the self-repairing particles are broken under tip stress, the repairing agent in the self-repairing particles can be gradually dissolved in water and generate repairing substance carbonate ions, the repairing substance carbonate ions are compounded with calcium ions in the cement matrix material to form calcium carbonate precipitates, and the micro-cracks are filled with the calcium carbonate precipitates for repairing. The waterproof layer on the outer layer of the inner core material can reduce the water absorption rate of the self-repairing particles, water can be prevented from entering the self-repairing particles in advance, a repairing agent is prevented from reacting with substances in a cement matrix in advance, and it is guaranteed that the self-repairing particles play a role after micro-cracks appear.
本发明公开了一种自修复颗粒、自修复水泥基复合材料及其制备方法，自修复颗粒，包括内芯、防水层和外壳；防水层为树脂薄膜，其包覆在内芯材料外表面；外壳为水泥外壳；所述内芯按质量份计，由以下组分组成：碳酸钠5～7份、硅灰1～3份、二氧化硅1～3份、生石灰5～7份、氧化镁膨胀剂1～2份、膨润土1～2份。当自修复颗粒在尖端应力下破裂时，其内部的修复剂可以逐渐溶解于水并生成修复物质碳酸根离子，与水泥基体材料中的钙离子复合形成碳酸钙沉淀，填充到微裂缝处进行修复。内芯材料外层的防水层能够降低自修复颗粒的吸水率，可以阻止水分提前进入，防止修复剂与水泥基体中的物质提前发生反应，保证在微裂缝后出现后才发挥作用。
Self-repairing particle, self-repairing cement-based composite material and preparation method thereof
The invention discloses a self-repairing particle, a self-repairing cement-based composite material and a preparation method thereof, the self-repairing particle comprises an inner core, a waterproof layer and a shell; the waterproof layer is a resin film and wraps the outer surface of the inner core material; the shell is a cement shell; the inner core is prepared from the following components in parts by mass: 5-7 parts of sodium carbonate, 1-3 parts of silica fume, 1-3 parts of silicon dioxide, 5-7 parts of quick lime, 1-2 parts of a magnesium oxide expanding agent and 1-2 parts of bentonite. When the self-repairing particles are broken under tip stress, the repairing agent in the self-repairing particles can be gradually dissolved in water and generate repairing substance carbonate ions, the repairing substance carbonate ions are compounded with calcium ions in the cement matrix material to form calcium carbonate precipitates, and the micro-cracks are filled with the calcium carbonate precipitates for repairing. The waterproof layer on the outer layer of the inner core material can reduce the water absorption rate of the self-repairing particles, water can be prevented from entering the self-repairing particles in advance, a repairing agent is prevented from reacting with substances in a cement matrix in advance, and it is guaranteed that the self-repairing particles play a role after micro-cracks appear.
本发明公开了一种自修复颗粒、自修复水泥基复合材料及其制备方法，自修复颗粒，包括内芯、防水层和外壳；防水层为树脂薄膜，其包覆在内芯材料外表面；外壳为水泥外壳；所述内芯按质量份计，由以下组分组成：碳酸钠5～7份、硅灰1～3份、二氧化硅1～3份、生石灰5～7份、氧化镁膨胀剂1～2份、膨润土1～2份。当自修复颗粒在尖端应力下破裂时，其内部的修复剂可以逐渐溶解于水并生成修复物质碳酸根离子，与水泥基体材料中的钙离子复合形成碳酸钙沉淀，填充到微裂缝处进行修复。内芯材料外层的防水层能够降低自修复颗粒的吸水率，可以阻止水分提前进入，防止修复剂与水泥基体中的物质提前发生反应，保证在微裂缝后出现后才发挥作用。
Self-repairing particle, self-repairing cement-based composite material and preparation method thereof
一种自修复颗粒、自修复水泥基复合材料及其制备方法
LIU RENTAI (author) / DOU LIUYANG (author) / ZHANG CHUNYU (author) / BAI YUANXIN (author) / BAI JIWEN (author) / CHEN MENGJUN (author) / YAN JIA (author) / LI XIUHAO (author) / ZHU ZHIJING (author) / XU XIANJIE (author)
2022-12-30
Patent
Electronic Resource
Chinese
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