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Preparation method and application of solid waste-based 3D printing concrete
The invention discloses a preparation method and application of solid-waste-based 3D printing concrete. The method comprises the following steps: (1) uniformly mixing steel slag fine aggregate with an aqueous solution of a polycarboxylic acid water reducing agent to form a wet material, and carrying out heating and steam curing treatment on the wet material; then uniformly mixing with a sodium stearate solution, then carrying out heating steam-curing treatment, and then drying to obtain the pretreated steel slag fine aggregate. (2) adding calcium salt into the red mud slurry, stirring until the calcium salt is completely dissolved, then adding sodium silicate, and carrying out heat preservation under the conditions of heating and ultrasonic treatment; and drying the obtained solid, grinding into powder, and calcining the powder to obtain the active red mud powder. And (3) uniformly mixing Portland cement, the pretreated steel slag fine aggregate, active red mud powder, reinforced fibers and cellulose ether serving as raw materials, adding water, and uniformly mixing, so as to obtain the 3D printing concrete. The problem that the volume stability of the steel slag is poor is effectively solved, and the steel slag can be suitable for preparing the 3D printing concrete.
本发明公开一种固废基3D打印混凝土的制备方法及其应用，所述方法包括：（1）将钢渣细骨料与聚羧酸减水剂的水溶液混匀形成的湿料进行加热蒸养处理。然后与硬脂酸钠溶液混匀后进行加热蒸养处理，完成后进行干燥，得预处理钢渣细骨料。（2）在赤泥泥浆中加入钙盐搅拌至其完全溶解，然后加入硅酸钠并在加热和超声处理条件下进行保温。完成后将所得固体物干燥、研磨成粉末，然后将所述粉末进行煅烧处理，即得活性赤泥粉。（3）以硅酸盐水泥、预处理钢渣细骨料、活性赤泥粉、增强纤维、纤维素醚为原料，将上述原料混合均匀后加水混匀，即得3D打印混凝土。本发明不仅有效克服了钢渣的体积安定性不良的问题，使其能够适于制备3D打印混凝土。
Preparation method and application of solid waste-based 3D printing concrete
The invention discloses a preparation method and application of solid-waste-based 3D printing concrete. The method comprises the following steps: (1) uniformly mixing steel slag fine aggregate with an aqueous solution of a polycarboxylic acid water reducing agent to form a wet material, and carrying out heating and steam curing treatment on the wet material; then uniformly mixing with a sodium stearate solution, then carrying out heating steam-curing treatment, and then drying to obtain the pretreated steel slag fine aggregate. (2) adding calcium salt into the red mud slurry, stirring until the calcium salt is completely dissolved, then adding sodium silicate, and carrying out heat preservation under the conditions of heating and ultrasonic treatment; and drying the obtained solid, grinding into powder, and calcining the powder to obtain the active red mud powder. And (3) uniformly mixing Portland cement, the pretreated steel slag fine aggregate, active red mud powder, reinforced fibers and cellulose ether serving as raw materials, adding water, and uniformly mixing, so as to obtain the 3D printing concrete. The problem that the volume stability of the steel slag is poor is effectively solved, and the steel slag can be suitable for preparing the 3D printing concrete.
本发明公开一种固废基3D打印混凝土的制备方法及其应用，所述方法包括：（1）将钢渣细骨料与聚羧酸减水剂的水溶液混匀形成的湿料进行加热蒸养处理。然后与硬脂酸钠溶液混匀后进行加热蒸养处理，完成后进行干燥，得预处理钢渣细骨料。（2）在赤泥泥浆中加入钙盐搅拌至其完全溶解，然后加入硅酸钠并在加热和超声处理条件下进行保温。完成后将所得固体物干燥、研磨成粉末，然后将所述粉末进行煅烧处理，即得活性赤泥粉。（3）以硅酸盐水泥、预处理钢渣细骨料、活性赤泥粉、增强纤维、纤维素醚为原料，将上述原料混合均匀后加水混匀，即得3D打印混凝土。本发明不仅有效克服了钢渣的体积安定性不良的问题，使其能够适于制备3D打印混凝土。
Preparation method and application of solid waste-based 3D printing concrete
一种固废基3D打印混凝土的制备方法及其应用
LIU YAN (author) / MENG DAN (author) / CHEN MINGXU (author) / JEON HONG-JU (author) / RUAN XUEJING (author) / YU LEI (author)
2024-06-25
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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