Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-shrinkage ultra-high performance concrete and preparation method thereof
The invention relates to low-shrinkage ultra-high performance concrete, which is prepared from the following raw materials in parts by weight: 800 to 900 parts of a special composite cementing material; 50 to 80 parts of silica fume; 200 to 250 parts of I-grade fly ash; 140 to 160 parts of copper-plated steel fibers; 15-20 parts of a water reducing agent; 1000 to 1100 parts of quartz sand; 160-180parts of water. The special composite cementing material is prepared by uniformly dry-mixing the following raw materials in parts by weight: 75-85 parts of Portland cement clinker powder; 10 to 20 parts of expansive high-belite calcium sulfoaluminate cement clinker powder; 5-10 parts of anhydrite powder. According to the invention, the UHPC self-shrinkage value is small; and the 7d self-shrinkage value ranges from 300 ppm to 350 ppm, the later cracking risk of the UHPC material is reduced, component deformation is reduced, the ultrahigh strength and durability are achieved, the 1d compressive strength reaches 60 MPa to 70 MPa, the 28d compressive strength reaches 160 MPa to 180 MPa, the liquidity is good, and the preparation cost is reduced.
本发明涉及一种低收缩超高性能混凝土，包括如下重量份原料：专用复合胶凝材料800～900份；硅灰50～80份；Ⅰ级粉煤灰200～250份；镀铜钢纤维140～160份；减水剂15～20份；石英砂1000～1100份；水160～180份。专用复合胶凝材料，由如下重量份原料干混均匀得到：硅酸盐水泥熟料粉75～85份；膨胀性高贝利特硫铝酸盐水泥熟料粉10～20份；硬石膏粉5～10份。本发明UHPC自收缩值小，7d自收缩值为300～350ppm，降低UHPC材料后期开裂风险和减小构件变形，具备超高强度和耐久性，1d抗压强度达60‑70MPa，28d抗压强度达160‑180MPa，流动性好，制备成本降低。
Low-shrinkage ultra-high performance concrete and preparation method thereof
The invention relates to low-shrinkage ultra-high performance concrete, which is prepared from the following raw materials in parts by weight: 800 to 900 parts of a special composite cementing material; 50 to 80 parts of silica fume; 200 to 250 parts of I-grade fly ash; 140 to 160 parts of copper-plated steel fibers; 15-20 parts of a water reducing agent; 1000 to 1100 parts of quartz sand; 160-180parts of water. The special composite cementing material is prepared by uniformly dry-mixing the following raw materials in parts by weight: 75-85 parts of Portland cement clinker powder; 10 to 20 parts of expansive high-belite calcium sulfoaluminate cement clinker powder; 5-10 parts of anhydrite powder. According to the invention, the UHPC self-shrinkage value is small; and the 7d self-shrinkage value ranges from 300 ppm to 350 ppm, the later cracking risk of the UHPC material is reduced, component deformation is reduced, the ultrahigh strength and durability are achieved, the 1d compressive strength reaches 60 MPa to 70 MPa, the 28d compressive strength reaches 160 MPa to 180 MPa, the liquidity is good, and the preparation cost is reduced.
本发明涉及一种低收缩超高性能混凝土，包括如下重量份原料：专用复合胶凝材料800～900份；硅灰50～80份；Ⅰ级粉煤灰200～250份；镀铜钢纤维140～160份；减水剂15～20份；石英砂1000～1100份；水160～180份。专用复合胶凝材料，由如下重量份原料干混均匀得到：硅酸盐水泥熟料粉75～85份；膨胀性高贝利特硫铝酸盐水泥熟料粉10～20份；硬石膏粉5～10份。本发明UHPC自收缩值小，7d自收缩值为300～350ppm，降低UHPC材料后期开裂风险和减小构件变形，具备超高强度和耐久性，1d抗压强度达60‑70MPa，28d抗压强度达160‑180MPa，流动性好，制备成本降低。
Low-shrinkage ultra-high performance concrete and preparation method thereof
一种低收缩超高性能混凝土及其制备方法
YAO PIQIANG (Autor:in) / ZHAO YANYAN (Autor:in)
16.06.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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