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A platform for research: civil engineering, architecture and urbanism
High-elastic-modulus concrete material for 3D printing and preparation method of high-elastic-modulus concrete material
The invention discloses a high-elastic-modulus concrete material for 3D printing and a preparation method of the high-elastic-modulus concrete material. The high-elastic-modulus concrete material is prepared from the following components in parts by weight: 0.2 to 0.3 part of water, 1.5 to 1.7 parts of coarse aggregate, 0.4 part of cementing material, 0.0003 to 0.0005 part of cellulose ether, 0.002 to 0.004 part of fiber and 0.002 to 0.003 part of water reducing agent. The preparation method comprises the following steps: weighing the cementing material, the coarse aggregate and the cellulose ether according to the formula proportion of the concrete material, weighing the water and the polypropylene fiber, pre-stirring for half a minute to obtain a pre-mixture, adding the water, the water reducing agent and the fiber, slowly stirring for 2 minutes, standing for 1 minute, and quickly stirring for 2 minutes to obtain a final mixture. The static yield stress of the 3D printing concrete meets 2000-3000 Pa, the fluidity meets 150-180 mm, the slump of a cylinder is smaller than 10 mm, a 3D printing building structure is converted into ductile failure from traditional brittle failure, the printability is met, meanwhile, the material performance, the interface performance and the shrinkage crack resistance are improved, and the safety of the 3D printing building structure is guaranteed.
本发明公开了一种用于3D打印的高弹模混凝土材料及其制备方法，包括以下重量份组分：水0.2‑0.3份、粗骨料1.5‑1.7份、胶凝材料0.4份、纤维素醚0.0003‑0.0005份、纤维0.002‑0.004份、减水剂0.002‑0.003份。其制备步骤如下：按混凝土材料的配方比例，计量取胶凝材料、粗骨料、纤维素醚、称水、聚丙烯纤维，预搅拌半分钟，获得预拌合物，再加入水、减水剂和纤维慢拌2分钟，静置1分钟后，快拌2分钟获得最终的拌合物。本发明的3D打印混凝土的静态屈服应力满足2000‑3000 Pa、流动度满足150‑180 mm、圆筒的坍落度小于10mm，使3D打印建筑结构由传统的脆性破坏转变为延性破坏，在满足可打印性的同时，提升材料性能、界面性能和收缩抗裂性能，保证3D打印建筑结构的安全性。
High-elastic-modulus concrete material for 3D printing and preparation method of high-elastic-modulus concrete material
The invention discloses a high-elastic-modulus concrete material for 3D printing and a preparation method of the high-elastic-modulus concrete material. The high-elastic-modulus concrete material is prepared from the following components in parts by weight: 0.2 to 0.3 part of water, 1.5 to 1.7 parts of coarse aggregate, 0.4 part of cementing material, 0.0003 to 0.0005 part of cellulose ether, 0.002 to 0.004 part of fiber and 0.002 to 0.003 part of water reducing agent. The preparation method comprises the following steps: weighing the cementing material, the coarse aggregate and the cellulose ether according to the formula proportion of the concrete material, weighing the water and the polypropylene fiber, pre-stirring for half a minute to obtain a pre-mixture, adding the water, the water reducing agent and the fiber, slowly stirring for 2 minutes, standing for 1 minute, and quickly stirring for 2 minutes to obtain a final mixture. The static yield stress of the 3D printing concrete meets 2000-3000 Pa, the fluidity meets 150-180 mm, the slump of a cylinder is smaller than 10 mm, a 3D printing building structure is converted into ductile failure from traditional brittle failure, the printability is met, meanwhile, the material performance, the interface performance and the shrinkage crack resistance are improved, and the safety of the 3D printing building structure is guaranteed.
本发明公开了一种用于3D打印的高弹模混凝土材料及其制备方法，包括以下重量份组分：水0.2‑0.3份、粗骨料1.5‑1.7份、胶凝材料0.4份、纤维素醚0.0003‑0.0005份、纤维0.002‑0.004份、减水剂0.002‑0.003份。其制备步骤如下：按混凝土材料的配方比例，计量取胶凝材料、粗骨料、纤维素醚、称水、聚丙烯纤维，预搅拌半分钟，获得预拌合物，再加入水、减水剂和纤维慢拌2分钟，静置1分钟后，快拌2分钟获得最终的拌合物。本发明的3D打印混凝土的静态屈服应力满足2000‑3000 Pa、流动度满足150‑180 mm、圆筒的坍落度小于10mm，使3D打印建筑结构由传统的脆性破坏转变为延性破坏，在满足可打印性的同时，提升材料性能、界面性能和收缩抗裂性能，保证3D打印建筑结构的安全性。
High-elastic-modulus concrete material for 3D printing and preparation method of high-elastic-modulus concrete material
一种用于3D打印的高弹模混凝土材料及其制备方法
WU JIE (author) / LIN YONGQUAN (author) / WEI ZIYI (author) / OU XIANG (author) / WANG YIJIE (author) / WANG XIAOHUI (author) / YAO BICHENG (author)
2023-05-26
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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