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A platform for research: civil engineering, architecture and urbanism
Ultra-high performance concrete for large-span beam construction and preparation method thereof
The invention discloses ultra-high performance concrete for large-span beam construction and a preparation method of the ultra-high performance concrete. Firstly, polyamide and carbon black are used as raw materials, and modified polyamide long fibers are prepared; surface electrolytic etching is conducted on the stainless steel short fibers to obtain etched stainless steel short fibers, and water-absorbent resin is loaded on the surfaces of the short carbon fibers to obtain modified short carbon fibers; and cement, fly ash, slag powder, coarse aggregate, fine aggregate, modified polyamide long fiber, etched stainless steel short fiber and modified short carbon fiber are subjected to dry mixing and uniform mixing, a water reducing agent and water are added while stirring is conducted, stirring and uniform mixing are conducted, electric field treatment is conducted, and the concrete is obtained. The concrete obtained by the invention has excellent mechanical properties and low contractility, is particularly suitable for large-span beam construction, and ensures the construction safety of the large-span beam.
本发明公开了用于大跨度梁施工的超高性能混凝土及其制备方法，先以聚酰胺和炭黑为原料，制备改性聚酰胺长纤维；再将不锈钢短纤维经表面电解蚀刻，得到蚀刻不锈钢短纤维，接着将短切碳纤维表面负载吸水树脂，得到改性短切碳纤维；然后将水泥、粉煤灰、矿渣粉、粗骨料、细骨料、改性聚酰胺长纤维、蚀刻不锈钢短纤维、改性短切碳纤维干拌混合均匀，接着边搅拌边加入减水剂和水，搅拌混匀，电场处理，得到混凝土。本发明所得混凝土具有优异的力学性能和低收缩性，特别适用于大跨度梁施工，保证了大跨度梁的施工安全。
Ultra-high performance concrete for large-span beam construction and preparation method thereof
The invention discloses ultra-high performance concrete for large-span beam construction and a preparation method of the ultra-high performance concrete. Firstly, polyamide and carbon black are used as raw materials, and modified polyamide long fibers are prepared; surface electrolytic etching is conducted on the stainless steel short fibers to obtain etched stainless steel short fibers, and water-absorbent resin is loaded on the surfaces of the short carbon fibers to obtain modified short carbon fibers; and cement, fly ash, slag powder, coarse aggregate, fine aggregate, modified polyamide long fiber, etched stainless steel short fiber and modified short carbon fiber are subjected to dry mixing and uniform mixing, a water reducing agent and water are added while stirring is conducted, stirring and uniform mixing are conducted, electric field treatment is conducted, and the concrete is obtained. The concrete obtained by the invention has excellent mechanical properties and low contractility, is particularly suitable for large-span beam construction, and ensures the construction safety of the large-span beam.
本发明公开了用于大跨度梁施工的超高性能混凝土及其制备方法，先以聚酰胺和炭黑为原料，制备改性聚酰胺长纤维；再将不锈钢短纤维经表面电解蚀刻，得到蚀刻不锈钢短纤维，接着将短切碳纤维表面负载吸水树脂，得到改性短切碳纤维；然后将水泥、粉煤灰、矿渣粉、粗骨料、细骨料、改性聚酰胺长纤维、蚀刻不锈钢短纤维、改性短切碳纤维干拌混合均匀，接着边搅拌边加入减水剂和水，搅拌混匀，电场处理，得到混凝土。本发明所得混凝土具有优异的力学性能和低收缩性，特别适用于大跨度梁施工，保证了大跨度梁的施工安全。
Ultra-high performance concrete for large-span beam construction and preparation method thereof
用于大跨度梁施工的超高性能混凝土及其制备方法
LI XINGMAN (author) / LIU ZHUO (author) / WANG WEI (author) / MENG XIANGJUN (author) / MA XINYU (author)
2022-01-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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