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3D printing concrete apparent crack defect repairing material and preparation method thereof
The invention discloses a 3D printing concrete apparent crack defect repairing material and a preparation method thereof, the 3D printing concrete apparent crack defect repairing material comprises the following raw materials by mass percentage: 15-25% of cement; 25%-35% of coarse aggregate; 15%-25% of fine aggregate; 9%-12% of water; 3%-5% of a mineral admixture; 0.1% to 0.6% of a super plasticizer; 0.1% to 0.4% of a thixotropic agent; 2%-4% of an early strength agent; 0.03% to 0.08% of fiber; 0.02% to 0.05% of cellulose ether; and 5%-7% of a microbial liquid. Aiming at the phenomena of more initial pores and cracks caused by the characteristics of a 3D printing coarse aggregate concrete material and a printing process, optimization is carried out from the perspective of an apparent crack defect repairing material formula, bacillus microorganisms are added, and the initial pores and cracks are repaired by using calcium carbonate precipitates generated by mineralization reaction of the bacillus microorganisms; the crack width of the outer surface of the 3D printing coarse aggregate concrete is effectively reduced, and the mechanical property and durability of the 3D printing coarse aggregate concrete are remarkably improved.
本发明公开了一种3D打印混凝土表观裂缝缺陷修复材料及制备方法，3D打印混凝土表观裂缝缺陷修复材料，由以下原料按质量百分含量组成修补材料：水泥15％～25％；粗骨料25％～35；细骨料15％～25％；水9％～12％；矿物掺合料3％～5％；超级塑化剂0.1％～0.6％；触变剂0.1％～0.4％；早强剂2％～4％；纤维0.03％～0.08％；纤维素醚0.02％～0.05％；微生物菌液5％～7％。本发明针对3D打印粗骨料混凝土材料特性和打印工艺带来的初始孔隙和裂缝较多的现象，从表观裂缝缺陷修复材料配方的角度进行优化，加入芽孢杆菌微生物，利用其矿化反应生成的碳酸钙沉淀修复其初始孔隙和裂缝，有效地减小了3D打印粗骨料混凝土外表面裂缝宽度，显著提高了3D打印粗骨料混凝土的力学性能和耐久性。
3D printing concrete apparent crack defect repairing material and preparation method thereof
The invention discloses a 3D printing concrete apparent crack defect repairing material and a preparation method thereof, the 3D printing concrete apparent crack defect repairing material comprises the following raw materials by mass percentage: 15-25% of cement; 25%-35% of coarse aggregate; 15%-25% of fine aggregate; 9%-12% of water; 3%-5% of a mineral admixture; 0.1% to 0.6% of a super plasticizer; 0.1% to 0.4% of a thixotropic agent; 2%-4% of an early strength agent; 0.03% to 0.08% of fiber; 0.02% to 0.05% of cellulose ether; and 5%-7% of a microbial liquid. Aiming at the phenomena of more initial pores and cracks caused by the characteristics of a 3D printing coarse aggregate concrete material and a printing process, optimization is carried out from the perspective of an apparent crack defect repairing material formula, bacillus microorganisms are added, and the initial pores and cracks are repaired by using calcium carbonate precipitates generated by mineralization reaction of the bacillus microorganisms; the crack width of the outer surface of the 3D printing coarse aggregate concrete is effectively reduced, and the mechanical property and durability of the 3D printing coarse aggregate concrete are remarkably improved.
本发明公开了一种3D打印混凝土表观裂缝缺陷修复材料及制备方法，3D打印混凝土表观裂缝缺陷修复材料，由以下原料按质量百分含量组成修补材料：水泥15％～25％；粗骨料25％～35；细骨料15％～25％；水9％～12％；矿物掺合料3％～5％；超级塑化剂0.1％～0.6％；触变剂0.1％～0.4％；早强剂2％～4％；纤维0.03％～0.08％；纤维素醚0.02％～0.05％；微生物菌液5％～7％。本发明针对3D打印粗骨料混凝土材料特性和打印工艺带来的初始孔隙和裂缝较多的现象，从表观裂缝缺陷修复材料配方的角度进行优化，加入芽孢杆菌微生物，利用其矿化反应生成的碳酸钙沉淀修复其初始孔隙和裂缝，有效地减小了3D打印粗骨料混凝土外表面裂缝宽度，显著提高了3D打印粗骨料混凝土的力学性能和耐久性。
3D printing concrete apparent crack defect repairing material and preparation method thereof
一种3D打印混凝土表观裂缝缺陷修复材料及其制备方法
LIU CHAO (author) / LIU HUAWEI (author) / LIU LIXI (author) / ZHU CHAO (author) / WANG YIFEI (author)
2024-08-30
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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