A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Heat-shrinkable fiber-reinforced 3D printing concrete and preparation method thereof
The invention relates to thermal shrinkage type fiber reinforced 3D printing concrete and a preparation method thereof.The thermal shrinkage type fiber is added into concrete, the length of the thermal shrinkage type fiber can be changed after heating, prestress is applied to the concrete through shrinkage stress of the thermal shrinkage type fiber evenly distributed in the concrete, and therefore the density of the concrete is improved; according to the present invention, the thermal shrinkage type fibers uniformly dispersed in the concrete apply the three-dimensional tightening self-stress on the concrete matrix, such that the gel holes and the micro-cracks formed at the early hydration stage can be healed, the more compact microstructure can be easily formed, and the reinforcement and the toughening of the concrete structure can be achieved so as to improve the bearing capacity and the anti-cracking performance of the 3D printing concrete; compared with 3D printing concrete not doped with fibers and 3D printing concrete doped with common synthetic fibers, the 3D printing concrete doped with heat shrinkage fibers and adopting heat curing has the advantages that the compressive strength, flexural tensile strength and flexural toughness are obviously improved.
本发明涉及一种热缩型纤维增强3D打印混凝土及其制备方法，本发明将热缩型纤维加入混凝土中，加热后其长度会发生变化，通过均匀分布在混凝土中的热缩型纤维的收缩应力对混凝土施加预应力，从而提高混凝土的致密度，混凝土中均匀分散的热缩型纤维对混凝土基体施加三维紧缩的自应力，可以愈合水化早期形成的凝胶孔及微裂缝，有助于形成更加致密的微结构，实现混凝土结构的增强和增韧，从而增加3D打印混凝土的承载能力和抗裂性能，与未掺加纤维的3D打印混凝土和掺有普通合成纤维的3D打印混凝土相比，掺加热缩型纤维并同时采用热养护的3D打印混凝土，其抗压强度、弯拉强度和弯曲韧性显著提高。
Heat-shrinkable fiber-reinforced 3D printing concrete and preparation method thereof
The invention relates to thermal shrinkage type fiber reinforced 3D printing concrete and a preparation method thereof.The thermal shrinkage type fiber is added into concrete, the length of the thermal shrinkage type fiber can be changed after heating, prestress is applied to the concrete through shrinkage stress of the thermal shrinkage type fiber evenly distributed in the concrete, and therefore the density of the concrete is improved; according to the present invention, the thermal shrinkage type fibers uniformly dispersed in the concrete apply the three-dimensional tightening self-stress on the concrete matrix, such that the gel holes and the micro-cracks formed at the early hydration stage can be healed, the more compact microstructure can be easily formed, and the reinforcement and the toughening of the concrete structure can be achieved so as to improve the bearing capacity and the anti-cracking performance of the 3D printing concrete; compared with 3D printing concrete not doped with fibers and 3D printing concrete doped with common synthetic fibers, the 3D printing concrete doped with heat shrinkage fibers and adopting heat curing has the advantages that the compressive strength, flexural tensile strength and flexural toughness are obviously improved.
本发明涉及一种热缩型纤维增强3D打印混凝土及其制备方法，本发明将热缩型纤维加入混凝土中，加热后其长度会发生变化，通过均匀分布在混凝土中的热缩型纤维的收缩应力对混凝土施加预应力，从而提高混凝土的致密度，混凝土中均匀分散的热缩型纤维对混凝土基体施加三维紧缩的自应力，可以愈合水化早期形成的凝胶孔及微裂缝，有助于形成更加致密的微结构，实现混凝土结构的增强和增韧，从而增加3D打印混凝土的承载能力和抗裂性能，与未掺加纤维的3D打印混凝土和掺有普通合成纤维的3D打印混凝土相比，掺加热缩型纤维并同时采用热养护的3D打印混凝土，其抗压强度、弯拉强度和弯曲韧性显著提高。
Heat-shrinkable fiber-reinforced 3D printing concrete and preparation method thereof
热缩型纤维增强3D打印混凝土及其制备方法
WU JING (author) / ZHENG XUELING (author) / YANG WEN (author) / DING QINGJUN (author) / WANG LUOXIN (author) / WANG HUA (author)
2024-02-02
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
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
/
D01D
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
,
Mechanische Verfahren oder Vorrichtungen für die Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
/
D01F
Chemische Gesichtspunkte bei der Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
,
CHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
/
E04C
STRUCTURAL ELEMENTS
,
Bauelemente
/
E04G
SCAFFOLDING
,
Baugerüste
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