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Ultra-high performance concrete suitable for positive and negative temperature alternating environment and preparation method thereof
The invention discloses ultra-high performance concrete suitable for a positive and negative temperature alternating environment, which is prepared from the following raw materials: ordinary Portland cement, sulphoaluminate cement, fly ash, sand, composite fibers, steel fibers, epoxy resin, nitrile rubber buna, polyamide, silica fume and a composite antifreezing agent, the composite fiber is a compound of modified polyethylene fiber and polyformaldehyde fiber, and the composite anti-freezing agent is a mixture of triethanolamine, nano cellulose crystal, N-methyl pyrrolidone, sodium nitrite, triterpenoid saponin and titanium dioxide sol; the working performance of the ultra-high performance concrete in a positive temperature environment is ensured, the hydration degree of the concrete is improved, an early-stage structure is formed, the damage of negative temperature to the concrete can be resisted in a negative temperature environment, the freezing point of water is weakened, the frost heaving stress during water freezing is relieved, and the damage of negative temperature to the early-stage structure of the concrete is reduced. The microstructure of the concrete is prevented from being damaged in an early freezing and thawing environment.
本发明公开一种适应于正负温交替环境下的超高性能混凝土，所述超高性能混凝土原料包括普通硅酸盐水泥、硫铝酸盐水泥、粉煤灰、砂、复合纤维、钢纤维、环氧树脂、丁晴橡胶、聚酰胺、硅灰、复合防冻剂，所述复合纤维为改性聚乙烯纤维和聚甲醛纤维的复合物，所述复合防冻剂为三乙醇胺、纳米纤维素晶体、N‑甲基吡咯烷酮、亚硝酸钠、三萜皂苷与二氧化钛溶胶的混合物；在确保正温环境下超高性能混凝土工作性的同时，提高混凝土的水化程度，形成早期结构，在负温环境下又能抵抗负温对混凝土的破坏，减弱水的冰点以及减缓水结冰时的冻胀应力，降低负温对混凝土早期结构的破坏，保证在早期冻融环境下混凝土的微观结构不被破坏。
Ultra-high performance concrete suitable for positive and negative temperature alternating environment and preparation method thereof
The invention discloses ultra-high performance concrete suitable for a positive and negative temperature alternating environment, which is prepared from the following raw materials: ordinary Portland cement, sulphoaluminate cement, fly ash, sand, composite fibers, steel fibers, epoxy resin, nitrile rubber buna, polyamide, silica fume and a composite antifreezing agent, the composite fiber is a compound of modified polyethylene fiber and polyformaldehyde fiber, and the composite anti-freezing agent is a mixture of triethanolamine, nano cellulose crystal, N-methyl pyrrolidone, sodium nitrite, triterpenoid saponin and titanium dioxide sol; the working performance of the ultra-high performance concrete in a positive temperature environment is ensured, the hydration degree of the concrete is improved, an early-stage structure is formed, the damage of negative temperature to the concrete can be resisted in a negative temperature environment, the freezing point of water is weakened, the frost heaving stress during water freezing is relieved, and the damage of negative temperature to the early-stage structure of the concrete is reduced. The microstructure of the concrete is prevented from being damaged in an early freezing and thawing environment.
本发明公开一种适应于正负温交替环境下的超高性能混凝土，所述超高性能混凝土原料包括普通硅酸盐水泥、硫铝酸盐水泥、粉煤灰、砂、复合纤维、钢纤维、环氧树脂、丁晴橡胶、聚酰胺、硅灰、复合防冻剂，所述复合纤维为改性聚乙烯纤维和聚甲醛纤维的复合物，所述复合防冻剂为三乙醇胺、纳米纤维素晶体、N‑甲基吡咯烷酮、亚硝酸钠、三萜皂苷与二氧化钛溶胶的混合物；在确保正温环境下超高性能混凝土工作性的同时，提高混凝土的水化程度，形成早期结构，在负温环境下又能抵抗负温对混凝土的破坏，减弱水的冰点以及减缓水结冰时的冻胀应力，降低负温对混凝土早期结构的破坏，保证在早期冻融环境下混凝土的微观结构不被破坏。
Ultra-high performance concrete suitable for positive and negative temperature alternating environment and preparation method thereof
一种适应于正负温交替环境下的超高性能混凝土及其制备方法
HUANG WEIRONG (author) / GUO JINCEN (author) / ZENG YI (author)
2024-08-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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