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Coarse aggregate-containing ultra-high performance concrete with high mechanical strength and preparation method of coarse aggregate-containing ultra-high performance concrete
The invention discloses ultra-high performance concrete with high mechanical strength and containing coarse aggregate. The ultra-high performance concrete is prepared from the following raw materials: 600-900 parts of cement, 50-300 parts of silica fume, 600-1000 parts of fine aggregate, 200-600 parts of coarse aggregate, 100-200 parts of steel fiber, 9-14 parts of a water reducing agent, 2-6 parts of modified graphene oxide and 1-2 parts of carbon nano-tubes, and the water-binder ratio is 0.15-0.25. The preparation method comprises the following steps: S1, sequentially adding the fine aggregate, the coarse aggregate, the cement, the silica fume and the water reducing agent into a stirring machine, and carrying out dry stirring for 1-2 minutes; s2, uniformly mixing water and the modified graphene oxide solution, adding carbon nano-tubes, continuously stirring uniformly, adding the mixed solution into a stirrer, stirring until the mixture in the stirrer is in a flowing state, continuously stirring, and adding steel fibers into the stirrer in the stirring process; and S3, uniformly transferring the stirred mixture into a mold, and vibrating on a vibrating table to obtain the product. The mechanical property of the ultra-high performance concrete can be improved, and the mechanical strength is improved.
本发明公开了一种高力学强度的含粗骨料超高性能混凝土，包括以下原料制成：水泥600‑900份、硅灰50‑300份、细骨料600‑1000份、粗骨料200‑600份、钢纤维100‑200份、减水剂9‑14份、改性氧化石墨烯2‑6份、纳米碳纳米管1‑2份、水胶比0.15‑0.25。本发明还公开了其制备方法，包括以下步骤：S1：将细骨料、粗骨料、水泥、硅灰、减水剂依次加入搅拌机内，干拌1‑2min；S2：将水和改性氧化石墨烯溶液混合均匀后，加入纳米碳纳米管，继续搅拌均匀，再将混合溶液加入搅拌机内搅拌，至搅拌机内的混合物处于流动状态，并继续搅拌，搅拌过程中，将钢纤维加入搅拌机内；S3：将搅拌好的混合物均匀转入模具内，在振动台震动，即得。本发明能够改善超高性能混凝土的力学性能，提高力学强度。
Coarse aggregate-containing ultra-high performance concrete with high mechanical strength and preparation method of coarse aggregate-containing ultra-high performance concrete
The invention discloses ultra-high performance concrete with high mechanical strength and containing coarse aggregate. The ultra-high performance concrete is prepared from the following raw materials: 600-900 parts of cement, 50-300 parts of silica fume, 600-1000 parts of fine aggregate, 200-600 parts of coarse aggregate, 100-200 parts of steel fiber, 9-14 parts of a water reducing agent, 2-6 parts of modified graphene oxide and 1-2 parts of carbon nano-tubes, and the water-binder ratio is 0.15-0.25. The preparation method comprises the following steps: S1, sequentially adding the fine aggregate, the coarse aggregate, the cement, the silica fume and the water reducing agent into a stirring machine, and carrying out dry stirring for 1-2 minutes; s2, uniformly mixing water and the modified graphene oxide solution, adding carbon nano-tubes, continuously stirring uniformly, adding the mixed solution into a stirrer, stirring until the mixture in the stirrer is in a flowing state, continuously stirring, and adding steel fibers into the stirrer in the stirring process; and S3, uniformly transferring the stirred mixture into a mold, and vibrating on a vibrating table to obtain the product. The mechanical property of the ultra-high performance concrete can be improved, and the mechanical strength is improved.
本发明公开了一种高力学强度的含粗骨料超高性能混凝土，包括以下原料制成：水泥600‑900份、硅灰50‑300份、细骨料600‑1000份、粗骨料200‑600份、钢纤维100‑200份、减水剂9‑14份、改性氧化石墨烯2‑6份、纳米碳纳米管1‑2份、水胶比0.15‑0.25。本发明还公开了其制备方法，包括以下步骤：S1：将细骨料、粗骨料、水泥、硅灰、减水剂依次加入搅拌机内，干拌1‑2min；S2：将水和改性氧化石墨烯溶液混合均匀后，加入纳米碳纳米管，继续搅拌均匀，再将混合溶液加入搅拌机内搅拌，至搅拌机内的混合物处于流动状态，并继续搅拌，搅拌过程中，将钢纤维加入搅拌机内；S3：将搅拌好的混合物均匀转入模具内，在振动台震动，即得。本发明能够改善超高性能混凝土的力学性能，提高力学强度。
Coarse aggregate-containing ultra-high performance concrete with high mechanical strength and preparation method of coarse aggregate-containing ultra-high performance concrete
一种高力学强度的含粗骨料超高性能混凝土及其制备方法
CHEN SHIQUAN (author) / TAN SHAOXU (author) / TIAN SHIKUAN (author) / WANG ZHIJIN (author) / ZENG GUOSHENG (author) / ZHANG YI (author) / ZOU SHUNQUAN (author) / ZOU JIAHONG (author) / HAN PENGFU (author) / LI GUANBING (author)
2024-01-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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