A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention relates to an ettringite whisker interlayer reinforced binder for 3D printing and a use method thereof. The binder comprises fly ash, steel slag micro powder, desulfurized gypsum, sodium silicate particles and water, the molar ratio of aluminum to sulfur in all the raw materials is 0.5-2, the molar ratio of calcium to aluminum is 2-6, and the molar ratio of calcium to aluminum is 1.5-3. A synchronous spraying mode is adopted for spraying on the surface of printed lower-layer concrete in the printing process, when upper-layer concrete is extruded out and accumulated on the upper layer of the lower-layer concrete, the binder sprayed on the surface is evenly extruded between layers due to the influence of the gravity of the binder, and under the action of the alkaline environment of the sodium silicate and the concrete surface, the desulfurized gypsum, the fly ash and the steel slag generate N (C)-A-S-H gel and ettringite whiskers, interface strength is provided through combination of the gel and the whiskers, the strength supplementing effect on interlayer weak planes is achieved, and meanwhile water evaporation caused by too long interval time of up-down printing is reduced.
本发明为用于3D打印的钙钒石晶须层间增强粘结剂及其使用方法。该粘结剂包括粉煤灰、钢渣微粉、脱硫石膏、硅酸钠颗粒和水，其中所有原料中铝硫元素的摩尔比为0.5～2，钙铝元素的摩尔比为2～6，钙铝元素的摩尔比为1.5～3。采用同步喷洒的方式在打印的过程中喷射在已经打印的下层混凝土表面，待上层混凝土挤出并堆积在下层混凝土上层时，由于自身重力的影响将喷射在表面的粘结剂均匀的挤压在层间，在硅酸钠和混凝土表面的碱性环境作用下，脱硫石膏、粉煤灰和钢渣生成N(C)‑A‑S‑H凝胶和钙钒石晶须，通过凝胶‑晶须的组合提供界面强度，对层间弱面起到强度补充作用，同时减少因为上下打印间隔时间过长所造成的水分蒸发。
The invention relates to an ettringite whisker interlayer reinforced binder for 3D printing and a use method thereof. The binder comprises fly ash, steel slag micro powder, desulfurized gypsum, sodium silicate particles and water, the molar ratio of aluminum to sulfur in all the raw materials is 0.5-2, the molar ratio of calcium to aluminum is 2-6, and the molar ratio of calcium to aluminum is 1.5-3. A synchronous spraying mode is adopted for spraying on the surface of printed lower-layer concrete in the printing process, when upper-layer concrete is extruded out and accumulated on the upper layer of the lower-layer concrete, the binder sprayed on the surface is evenly extruded between layers due to the influence of the gravity of the binder, and under the action of the alkaline environment of the sodium silicate and the concrete surface, the desulfurized gypsum, the fly ash and the steel slag generate N (C)-A-S-H gel and ettringite whiskers, interface strength is provided through combination of the gel and the whiskers, the strength supplementing effect on interlayer weak planes is achieved, and meanwhile water evaporation caused by too long interval time of up-down printing is reduced.
本发明为用于3D打印的钙钒石晶须层间增强粘结剂及其使用方法。该粘结剂包括粉煤灰、钢渣微粉、脱硫石膏、硅酸钠颗粒和水，其中所有原料中铝硫元素的摩尔比为0.5～2，钙铝元素的摩尔比为2～6，钙铝元素的摩尔比为1.5～3。采用同步喷洒的方式在打印的过程中喷射在已经打印的下层混凝土表面，待上层混凝土挤出并堆积在下层混凝土上层时，由于自身重力的影响将喷射在表面的粘结剂均匀的挤压在层间，在硅酸钠和混凝土表面的碱性环境作用下，脱硫石膏、粉煤灰和钢渣生成N(C)‑A‑S‑H凝胶和钙钒石晶须，通过凝胶‑晶须的组合提供界面强度，对层间弱面起到强度补充作用，同时减少因为上下打印间隔时间过长所造成的水分蒸发。
Ettringite whisker interlayer reinforced binder for 3D printing and use method thereof
用于3D打印的钙钒石晶须层间增强粘结剂及使用方法
2021-05-07
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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