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A platform for research: civil engineering, architecture and urbanism
Anti-freezing saltpetering-resistant red mud baking-free brick and preparation method thereof
The invention relates to an anti-freezing saltpetering-resistant red mud-based baking-free brick and a preparation method thereof. The brick is prepared from the following raw material components: 20to 40 percent of red mud, 10 to 25 percent of power plant coal ash, 5 to 15 percent of electrolytic manganese slag, 20 to 30 percent of metallurgical slag, 5 to 9 percent of 42.5 Portland cement, 20 to 30 percent of graded coal gangue, 3 to 9 percent of excitant, 0.5 to 2 percent of modifier, 0.1 to 0.2 percent of naphthalene water reducer and 3 to 10 percent of composite phase change material microcapsule. The composite phase-change material microcapsule is prepared by taking modified fly ash as a supporting material to adsorb a phase-change material and then coating the phase-change materialwith organic resin. The composite phase change material microcapsules are added, so that the sensitivity of the baking-free brick to the temperature can be effectively reduced, and the expansion andcracking degrees of the baking-free brick in the freezing and thawing process are reduced. Based on the composite synergistic effect theory of various solid waste resources, the volcanic ash activityof solid waste such as power plant coal ash and metallurgical slag is fully excited, a crystalline or amorphous hydration product is formed, the internal pore structure of a matrix can be filled, Na <+> in the matrix is effectively cured, and saltpetering of the baking-free brick is inhibited.
一种抗冻抗泛碱赤泥基免烧砖及制备方法。各原料组分：赤泥20～40％，电厂粉煤灰10～25％，电解锰渣5～15％，冶金渣20～30％，42.5硅酸盐水泥5～9％，级配煤矸石20～30％，激发剂3～9％，改性剂0.5～2％，萘系减水剂0.1～0.2％，复合相变材料微胶囊3～10％。本发明中复合相变材料微胶囊是由改性粉煤灰作为支撑材料吸附相变材料，再由有机树脂包覆制得。添加复合相变材料微胶囊，能够有效降低免烧砖对温度的敏感性，从而降低其在冻融过程中造成的膨胀、开裂程度。本发明基于多种固废资源的复合协同效应理论，充分激发电厂粉煤灰、冶金渣等固体废弃物的火山灰活性，形成晶态或非晶态的水化产物，不仅可以填充基体内部孔隙结构，而且有效固化基体中的Na+，从而抑制免烧砖的泛碱。
Anti-freezing saltpetering-resistant red mud baking-free brick and preparation method thereof
The invention relates to an anti-freezing saltpetering-resistant red mud-based baking-free brick and a preparation method thereof. The brick is prepared from the following raw material components: 20to 40 percent of red mud, 10 to 25 percent of power plant coal ash, 5 to 15 percent of electrolytic manganese slag, 20 to 30 percent of metallurgical slag, 5 to 9 percent of 42.5 Portland cement, 20 to 30 percent of graded coal gangue, 3 to 9 percent of excitant, 0.5 to 2 percent of modifier, 0.1 to 0.2 percent of naphthalene water reducer and 3 to 10 percent of composite phase change material microcapsule. The composite phase-change material microcapsule is prepared by taking modified fly ash as a supporting material to adsorb a phase-change material and then coating the phase-change materialwith organic resin. The composite phase change material microcapsules are added, so that the sensitivity of the baking-free brick to the temperature can be effectively reduced, and the expansion andcracking degrees of the baking-free brick in the freezing and thawing process are reduced. Based on the composite synergistic effect theory of various solid waste resources, the volcanic ash activityof solid waste such as power plant coal ash and metallurgical slag is fully excited, a crystalline or amorphous hydration product is formed, the internal pore structure of a matrix can be filled, Na <+> in the matrix is effectively cured, and saltpetering of the baking-free brick is inhibited.
一种抗冻抗泛碱赤泥基免烧砖及制备方法。各原料组分：赤泥20～40％，电厂粉煤灰10～25％，电解锰渣5～15％，冶金渣20～30％，42.5硅酸盐水泥5～9％，级配煤矸石20～30％，激发剂3～9％，改性剂0.5～2％，萘系减水剂0.1～0.2％，复合相变材料微胶囊3～10％。本发明中复合相变材料微胶囊是由改性粉煤灰作为支撑材料吸附相变材料，再由有机树脂包覆制得。添加复合相变材料微胶囊，能够有效降低免烧砖对温度的敏感性，从而降低其在冻融过程中造成的膨胀、开裂程度。本发明基于多种固废资源的复合协同效应理论，充分激发电厂粉煤灰、冶金渣等固体废弃物的火山灰活性，形成晶态或非晶态的水化产物，不仅可以填充基体内部孔隙结构，而且有效固化基体中的Na+，从而抑制免烧砖的泛碱。
Anti-freezing saltpetering-resistant red mud baking-free brick and preparation method thereof
一种抗冻抗泛碱赤泥免烧砖及制备方法
LIU XIAOMING (author) / LI ZEPENG (author) / WANG ZHENG (author) / WANG YAGUANG (author) / ZHANG WEI (author) / LI YONG (author)
2021-01-12
Patent
Electronic Resource
Chinese
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