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Ultra-high performance concrete containing coarse aggregate and preparation method thereof
The invention belongs to the technical field of bridge concrete materials, and particularly relates to ultra-high-performance concrete containing coarse aggregate and a preparation method of the ultra-high-performance concrete. The ultra-high-performance concrete is prepared from the following components in parts by weight: 625-675 parts of cement; 145 to 190 parts of fly ash; 90 to 145 parts of silica fume; 600 to 840 parts of fine aggregate; 480 to 720 parts of coarse aggregate; 16.9 to 20.9 parts of a water reducing agent; 0.19 to 0.48 part of a defoaming agent; 0.014 to 0.028 part of an air entraining agent; 0.10 to 0.30 part of a suspending agent; 160 to 200 parts of steel fiber; 156 to 166 parts of water; the cement is type II Portland cement with the strength grade of 52.5; the fly ash is superfine fly ash microspheres; the ultra-high-performance concrete has high strength, high ductility and high durability of traditional ultra-high-performance concrete, and meanwhile, by introducing high-quality aggregate and performing mix proportion design based on the closest packing principle, an interface transition area between set cement and the aggregate is further enhanced, the compressive strength and the elastic modulus of the aggregate are improved, and the shrinkage creep and the material preparation cost are reduced; and a practical basis is provided for lightweight application of the ultra-high performance concrete on a bridge structure.
本发明属于桥梁混凝土材料技术领域，具体的说是一种含粗骨料超高性能混凝土及其制备方法，该高性能混凝土由以下重量份数成分组成：水泥625‑675份；粉煤灰145‑190份；硅灰90‑145份；细骨料600‑840份；粗骨料480‑720份；减水剂16.9‑20.9份；消泡剂0.19‑0.48份；引气剂0.014‑0.028份；悬浮剂0.10‑0.30份；钢纤维160‑200份；水156‑166份；所述水泥为52.5强度等级的二型硅酸盐水泥；所述粉煤灰为超细粉煤灰微珠；既具备传统超高性能混凝土的高强度、高延性、高耐久，同时通过引入优质骨料，基于最紧密堆积原理进行配合比设计，进一步增强水泥石与骨料之间的界面过渡区，提升其抗压强度与弹性模量、降低收缩徐变和材料制备成本，为超高性能混凝土在桥梁结构上的轻量化应用提供了现实基础。
Ultra-high performance concrete containing coarse aggregate and preparation method thereof
The invention belongs to the technical field of bridge concrete materials, and particularly relates to ultra-high-performance concrete containing coarse aggregate and a preparation method of the ultra-high-performance concrete. The ultra-high-performance concrete is prepared from the following components in parts by weight: 625-675 parts of cement; 145 to 190 parts of fly ash; 90 to 145 parts of silica fume; 600 to 840 parts of fine aggregate; 480 to 720 parts of coarse aggregate; 16.9 to 20.9 parts of a water reducing agent; 0.19 to 0.48 part of a defoaming agent; 0.014 to 0.028 part of an air entraining agent; 0.10 to 0.30 part of a suspending agent; 160 to 200 parts of steel fiber; 156 to 166 parts of water; the cement is type II Portland cement with the strength grade of 52.5; the fly ash is superfine fly ash microspheres; the ultra-high-performance concrete has high strength, high ductility and high durability of traditional ultra-high-performance concrete, and meanwhile, by introducing high-quality aggregate and performing mix proportion design based on the closest packing principle, an interface transition area between set cement and the aggregate is further enhanced, the compressive strength and the elastic modulus of the aggregate are improved, and the shrinkage creep and the material preparation cost are reduced; and a practical basis is provided for lightweight application of the ultra-high performance concrete on a bridge structure.
本发明属于桥梁混凝土材料技术领域，具体的说是一种含粗骨料超高性能混凝土及其制备方法，该高性能混凝土由以下重量份数成分组成：水泥625‑675份；粉煤灰145‑190份；硅灰90‑145份；细骨料600‑840份；粗骨料480‑720份；减水剂16.9‑20.9份；消泡剂0.19‑0.48份；引气剂0.014‑0.028份；悬浮剂0.10‑0.30份；钢纤维160‑200份；水156‑166份；所述水泥为52.5强度等级的二型硅酸盐水泥；所述粉煤灰为超细粉煤灰微珠；既具备传统超高性能混凝土的高强度、高延性、高耐久，同时通过引入优质骨料，基于最紧密堆积原理进行配合比设计，进一步增强水泥石与骨料之间的界面过渡区，提升其抗压强度与弹性模量、降低收缩徐变和材料制备成本，为超高性能混凝土在桥梁结构上的轻量化应用提供了现实基础。
Ultra-high performance concrete containing coarse aggregate and preparation method thereof
一种含粗骨料超高性能混凝土及其制备方法
YUE YUNYE (author) / ZHANG LI (author) / BA TEER (author) / SHI JUAN (author) / ZOU YU (author) / HAN XU (author) / CAO YUHENG (author) / ZOU YI (author) / LIAO GANGQUN (author) / LIU LONGTAO (author)
2023-04-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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