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Preparation process of high-strength 3D printing concrete material with adjustable rheological property
The invention discloses a preparation process of a rheological-property-adjustable high-strength 3D printing concrete material, which comprises the following steps: (1) heating and melting a stearic acid solid into a liquid state, then adding magnesium phosphate cement powder and an inorganic filler, mixing, uniformly stirring, cooling, and grinding the obtained cured product to obtain precursor powder; and (2) spraying an absolute ethyl alcohol solution dissolved with a silane coupling agent on the precursor powder, uniformly mixing and drying to obtain the rheological property regulator powder. (3) taking a cement-based cementing material, the rheological property regulator, fine aggregate, cellulose nanocrystals and a water reducing agent as raw materials, mixing the raw materials, adding water, and uniformly stirring, so as to obtain the 3D printing concrete material. According to the process, the rheological property of concrete slurry before and after extrusion can be rapidly changed, the interface bonding force between stacking layers can be enhanced, and the structural stability of a printed product is improved.
本发明公开一种流变性可调的高强度3D打印混凝土材料的制备工艺，包括如下步骤：（1）将硬脂酸固体加热融化成液体状态，然后加入磷酸镁水泥粉、无机填料混合后搅拌均匀，待冷却后将得到的固化产物进行粉磨，即得前驱体粉末。（2）在所述前驱体粉末喷洒溶解有硅烷偶联剂的无水乙醇液，混合均匀干燥，即得流变性调节剂粉体。（3）以水泥基胶凝材料、所述流变性调节剂、细骨料、纤维素纳米晶、减水剂为原料，将上述各原料混合后加水搅拌均匀，即得3D打印混凝土材料。本发明的工艺不仅能够快速改变混凝土浆体在挤出前后的流变性，而且能够增强堆叠层之间的界面结合力，提高打印制品的结构稳定性。
Preparation process of high-strength 3D printing concrete material with adjustable rheological property
The invention discloses a preparation process of a rheological-property-adjustable high-strength 3D printing concrete material, which comprises the following steps: (1) heating and melting a stearic acid solid into a liquid state, then adding magnesium phosphate cement powder and an inorganic filler, mixing, uniformly stirring, cooling, and grinding the obtained cured product to obtain precursor powder; and (2) spraying an absolute ethyl alcohol solution dissolved with a silane coupling agent on the precursor powder, uniformly mixing and drying to obtain the rheological property regulator powder. (3) taking a cement-based cementing material, the rheological property regulator, fine aggregate, cellulose nanocrystals and a water reducing agent as raw materials, mixing the raw materials, adding water, and uniformly stirring, so as to obtain the 3D printing concrete material. According to the process, the rheological property of concrete slurry before and after extrusion can be rapidly changed, the interface bonding force between stacking layers can be enhanced, and the structural stability of a printed product is improved.
本发明公开一种流变性可调的高强度3D打印混凝土材料的制备工艺，包括如下步骤：（1）将硬脂酸固体加热融化成液体状态，然后加入磷酸镁水泥粉、无机填料混合后搅拌均匀，待冷却后将得到的固化产物进行粉磨，即得前驱体粉末。（2）在所述前驱体粉末喷洒溶解有硅烷偶联剂的无水乙醇液，混合均匀干燥，即得流变性调节剂粉体。（3）以水泥基胶凝材料、所述流变性调节剂、细骨料、纤维素纳米晶、减水剂为原料，将上述各原料混合后加水搅拌均匀，即得3D打印混凝土材料。本发明的工艺不仅能够快速改变混凝土浆体在挤出前后的流变性，而且能够增强堆叠层之间的界面结合力，提高打印制品的结构稳定性。
Preparation process of high-strength 3D printing concrete material with adjustable rheological property
一种流变性可调的高强度3D打印混凝土材料的制备工艺
MENG DAN (author) / FAN QICHANG (author) / CHEN MINGXU (author) / MENG XUE (author)
2024-05-14
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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