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A platform for research: civil engineering, architecture and urbanism
Self-compacting concrete and preparation method thereof
The invention discloses and provides self-compacting concrete, which is prepared from the following raw materials in parts by weight: 190 to 260 parts of ordinary Portland cement, 30 to 60 parts of fly ash, 30 to 50 parts of mineral powder, 10 to 20 parts of superfine stone powder, 0 to 20 parts of polycrystalline silicon powder, 700 to 1000 parts of limestone macadam machine-made sand, 800 to 1000 parts of limestone macadam, 6 to 10 parts of a functional polycarboxylate superplasticizer, 0.5 to 2 parts of a segregation-resistant agent. 1 to 3 parts of a nano C-S-H gel early strength agent and 160 to 180 parts of water; the specific surface area of the superfine stone powder is 1500-2500m<2>/kg; and the limestone macadam machine-made sand is rock particles with the particle size smaller than 4.75 mm. The slurry is full, the flowing speed of the concrete is high, the volume stability and the mechanical property are excellent, the setting time of the concrete can be shortened and the early strength can be improved under the condition of ensuring the self-compaction of the concrete, and no negative influence is caused on the development of the later strength of the concrete.
本发明公开了本发明提供了一种自密实混凝土，由下列重量份的原料组成：普通硅酸盐水泥190‑260份、粉煤灰30‑60份，矿粉30‑50份、超细石粉10‑20份，多晶硅粉0‑20份、石灰岩碎石机制砂700‑1000份，石灰岩碎石800‑1000份，功能型聚羧酸减水剂6‑10份，抗离析剂0.5‑2份，纳米C‑S‑H凝胶早强剂1‑3份，水160‑180份；所述超细石粉比表面积为1500‑2500m2/kg；所述石灰岩碎石机制砂为粒径小于4.75mm的岩石颗粒。本发明浆体饱满、混凝土流动速度快，具有优异的体积稳定性、力学性能，并且能在保证混凝土自密实条件下，缩短混凝土凝结时间，提高了早期强度，并对混凝土后期强度发展无负面影响。
Self-compacting concrete and preparation method thereof
The invention discloses and provides self-compacting concrete, which is prepared from the following raw materials in parts by weight: 190 to 260 parts of ordinary Portland cement, 30 to 60 parts of fly ash, 30 to 50 parts of mineral powder, 10 to 20 parts of superfine stone powder, 0 to 20 parts of polycrystalline silicon powder, 700 to 1000 parts of limestone macadam machine-made sand, 800 to 1000 parts of limestone macadam, 6 to 10 parts of a functional polycarboxylate superplasticizer, 0.5 to 2 parts of a segregation-resistant agent. 1 to 3 parts of a nano C-S-H gel early strength agent and 160 to 180 parts of water; the specific surface area of the superfine stone powder is 1500-2500m<2>/kg; and the limestone macadam machine-made sand is rock particles with the particle size smaller than 4.75 mm. The slurry is full, the flowing speed of the concrete is high, the volume stability and the mechanical property are excellent, the setting time of the concrete can be shortened and the early strength can be improved under the condition of ensuring the self-compaction of the concrete, and no negative influence is caused on the development of the later strength of the concrete.
本发明公开了本发明提供了一种自密实混凝土，由下列重量份的原料组成：普通硅酸盐水泥190‑260份、粉煤灰30‑60份，矿粉30‑50份、超细石粉10‑20份，多晶硅粉0‑20份、石灰岩碎石机制砂700‑1000份，石灰岩碎石800‑1000份，功能型聚羧酸减水剂6‑10份，抗离析剂0.5‑2份，纳米C‑S‑H凝胶早强剂1‑3份，水160‑180份；所述超细石粉比表面积为1500‑2500m2/kg；所述石灰岩碎石机制砂为粒径小于4.75mm的岩石颗粒。本发明浆体饱满、混凝土流动速度快，具有优异的体积稳定性、力学性能，并且能在保证混凝土自密实条件下，缩短混凝土凝结时间，提高了早期强度，并对混凝土后期强度发展无负面影响。
Self-compacting concrete and preparation method thereof
一种自密实混凝土及其制备方法
XI FEIFEI (author) / XIE QIAN (author) / LI CHANGZHOU (author)
2021-12-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2024