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Preparation method of modified glass powder, cement-based 3D printing material and preparation method of cement-based 3D printing material
The invention discloses a preparation method of modified glass powder, a cement-based 3D printing material and a preparation method of the cement-based 3D printing material. The preparation method of the modified glass powder comprises the following steps: (1) treating glass powder with acid liquor, washing and drying to obtain pretreated glass powder; (2) uniformly mixing the pretreated glass powder with calcium carbonate, and calcining; and (3) dispersing the calcined product in a hot alkaline solution, adding acrylic acid for modification treatment, and then washing and drying the product to obtain the modified glass powder. The modified glass powder can absorb a large amount of free water in the printing slurry, so that the internal friction force among particles in the slurry is improved, and the yield stress and thixotropic property of the printing material are improved. Meanwhile, grafting groups on the surface of the modified glass powder can release free water when the slurry is subjected to shear force, so that the thixotropic property can be remarkably improved. Meanwhile, the glass powder contains a large amount of amorphous silicon dioxide and can generate a pozzolanic effect in the later hydration stage of the cement, so that the later strength of the cement-based material is improved.
本发明公开一种改性玻璃粉的制备方法、水泥基3D打印材料及其制备方法。所述改性玻璃粉的制备包括：(1)将玻璃粉用酸液处理后，洗涤、干燥，得预处理玻璃粉；(2)将预处理玻璃粉与碳酸钙混匀后煅烧；(3)将煅烧产物分散在热碱性溶液中并加入丙烯酸进行改性处理，完成后对产物进行洗涤、干燥，即得改性玻璃粉。改性后的玻璃粉能够大量吸收打印浆体中的自由水，从而提高浆体内部颗粒间的内摩擦力，改善打印材料的屈服应力和触变性能。同时由于改性玻璃粉表面的接枝基团能够在浆体受到剪切力时释放自由水，从而能够显著改善触变性能。同时，玻璃粉中含有大量无定型的二氧化硅，能够在水泥水化后期发生火山灰效应，改善水泥基材料的后期强度。
Preparation method of modified glass powder, cement-based 3D printing material and preparation method of cement-based 3D printing material
The invention discloses a preparation method of modified glass powder, a cement-based 3D printing material and a preparation method of the cement-based 3D printing material. The preparation method of the modified glass powder comprises the following steps: (1) treating glass powder with acid liquor, washing and drying to obtain pretreated glass powder; (2) uniformly mixing the pretreated glass powder with calcium carbonate, and calcining; and (3) dispersing the calcined product in a hot alkaline solution, adding acrylic acid for modification treatment, and then washing and drying the product to obtain the modified glass powder. The modified glass powder can absorb a large amount of free water in the printing slurry, so that the internal friction force among particles in the slurry is improved, and the yield stress and thixotropic property of the printing material are improved. Meanwhile, grafting groups on the surface of the modified glass powder can release free water when the slurry is subjected to shear force, so that the thixotropic property can be remarkably improved. Meanwhile, the glass powder contains a large amount of amorphous silicon dioxide and can generate a pozzolanic effect in the later hydration stage of the cement, so that the later strength of the cement-based material is improved.
本发明公开一种改性玻璃粉的制备方法、水泥基3D打印材料及其制备方法。所述改性玻璃粉的制备包括：(1)将玻璃粉用酸液处理后，洗涤、干燥，得预处理玻璃粉；(2)将预处理玻璃粉与碳酸钙混匀后煅烧；(3)将煅烧产物分散在热碱性溶液中并加入丙烯酸进行改性处理，完成后对产物进行洗涤、干燥，即得改性玻璃粉。改性后的玻璃粉能够大量吸收打印浆体中的自由水，从而提高浆体内部颗粒间的内摩擦力，改善打印材料的屈服应力和触变性能。同时由于改性玻璃粉表面的接枝基团能够在浆体受到剪切力时释放自由水，从而能够显著改善触变性能。同时，玻璃粉中含有大量无定型的二氧化硅，能够在水泥水化后期发生火山灰效应，改善水泥基材料的后期强度。
Preparation method of modified glass powder, cement-based 3D printing material and preparation method of cement-based 3D printing material
一种改性玻璃粉的制备方法、水泥基3D打印材料及其制备方法
CHEN MINGXU (author) / SUN KEKE (author) / LI QIUYI (author) / ZHOU XIAOLONG (author) / LI HAISHENG (author)
2022-06-03
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B33Y
ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
,
Additive (generative) Fertigung, d. h. die Herstellung von dreidimensionalen [3D] Bauteilen durch additive Abscheidung, additive Agglomeration oder additive Schichtung, z. B. durch 3D- Drucken, Stereolithografie oder selektives Lasersintern
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