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Aggregate strengthening and toughening modified ultra-high performance concrete and preparation method thereof
The invention discloses aggregate strengthening and toughening modified ultra-high performance concrete and a preparation method thereof. The concrete is prepared from the following components in parts by mass: 600 to 800 parts of Portland cement, 150 to 250 parts of silica fume, 50 to 200 parts of molybdenum slag powder, 1050 to 1150 parts of aggregate, 20 to 35 parts of aggregate surface modifier, 0.1 to 0.6 part of nano modifier, 117 to 234 parts of steel fiber, 8 to 15 parts of water reducing agent, 1 to 2 parts of defoaming agent and 150 to 180 parts of water. The preparation process of the concrete comprises the following steps: carrying out polymerization modification on the aggregate surface modifier and the carbon nanotubes on the aggregate surface, then uniformly mixing with other dry materials, then mixing with the remaining raw materials to form slurry, and carrying out die filling, vibrating, plastering and curing to obtain the concrete. According to the concrete, based on the synergistic modification effect of the aggregate surface modifier and the carbon nanotubes on the aggregate surface, on the basis of ensuring the mechanical strength of the concrete, the energy absorption effect and toughness of the concrete are greatly improved, the problem of insufficient deformation capacity of an ultra-high performance concrete matrix is effectively solved, and the application range of the ultra-high performance concrete is widened.
本发明公开了一种骨料强韧化修饰超高性能混凝土及其制备方法。该混凝土包括以下质量份数组分：硅酸盐水泥600～800份，硅灰150～250份，钼渣粉50～200份，骨料1050～1150份，骨料表面修饰剂20～35份，纳米改性剂0.1～0.6份，钢纤维117～234份，减水剂8～15份，消泡剂1～2份和水150～180份。该混凝土的制备过程为：将骨料表面修饰剂与碳纳米管在骨料表面进行聚合改性，然后与其他干料混合均匀，再与剩余原料混合形成浆料，经装模、振捣、抹面和养护即得。该混凝土基于骨料表面修饰剂与碳纳米管对骨料表面的协同改性作用，在保证混凝土力学强度的基础上，大幅提高混凝土的吸能效果与韧性，有效解决了超高性能混凝土基体形变能力不足的问题，拓宽了超高性能混凝土的应用范围。
Aggregate strengthening and toughening modified ultra-high performance concrete and preparation method thereof
The invention discloses aggregate strengthening and toughening modified ultra-high performance concrete and a preparation method thereof. The concrete is prepared from the following components in parts by mass: 600 to 800 parts of Portland cement, 150 to 250 parts of silica fume, 50 to 200 parts of molybdenum slag powder, 1050 to 1150 parts of aggregate, 20 to 35 parts of aggregate surface modifier, 0.1 to 0.6 part of nano modifier, 117 to 234 parts of steel fiber, 8 to 15 parts of water reducing agent, 1 to 2 parts of defoaming agent and 150 to 180 parts of water. The preparation process of the concrete comprises the following steps: carrying out polymerization modification on the aggregate surface modifier and the carbon nanotubes on the aggregate surface, then uniformly mixing with other dry materials, then mixing with the remaining raw materials to form slurry, and carrying out die filling, vibrating, plastering and curing to obtain the concrete. According to the concrete, based on the synergistic modification effect of the aggregate surface modifier and the carbon nanotubes on the aggregate surface, on the basis of ensuring the mechanical strength of the concrete, the energy absorption effect and toughness of the concrete are greatly improved, the problem of insufficient deformation capacity of an ultra-high performance concrete matrix is effectively solved, and the application range of the ultra-high performance concrete is widened.
本发明公开了一种骨料强韧化修饰超高性能混凝土及其制备方法。该混凝土包括以下质量份数组分：硅酸盐水泥600～800份，硅灰150～250份，钼渣粉50～200份，骨料1050～1150份，骨料表面修饰剂20～35份，纳米改性剂0.1～0.6份，钢纤维117～234份，减水剂8～15份，消泡剂1～2份和水150～180份。该混凝土的制备过程为：将骨料表面修饰剂与碳纳米管在骨料表面进行聚合改性，然后与其他干料混合均匀，再与剩余原料混合形成浆料，经装模、振捣、抹面和养护即得。该混凝土基于骨料表面修饰剂与碳纳米管对骨料表面的协同改性作用，在保证混凝土力学强度的基础上，大幅提高混凝土的吸能效果与韧性，有效解决了超高性能混凝土基体形变能力不足的问题，拓宽了超高性能混凝土的应用范围。
Aggregate strengthening and toughening modified ultra-high performance concrete and preparation method thereof
一种骨料强韧化修饰超高性能混凝土及其制备方法
YANG KAI (author) / LONG GUANGCHENG (author) / TANG ZHUO (author) / ZENG XIAOHUI (author) / SUN CHENGMING (author) / MA KUNLIN (author) / XIE YOUJUN (author)
2024-06-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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