A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Ultra-high performance concrete and preparation method thereof
The invention relates to ultra-high performance concrete and a preparation method thereof. The ultra-high performance concrete comprises the following components: 30-35% of cement, 40-45% of mixed quartz sand, 8-12% of admixture, 3-5% of steel fiber and the balance of water. The mixed quartz sand is quartz sand with SiO2 content greater than 97%, and comprises the following components: 48-52% of coarse-particle-size quartz sand, 28-32% of medium-particle-size quartz sand and 18-22% of fine-particle-size quartz sand; the admixture comprises the following components: 55-65% of silica fume and mineral powder and 35-45% of a water reducing agent; and the preparation method comprises the following steps: carrying out dry mixing on the cement, mixed quartz sand, silica fume and mineral powder for 30 seconds, pouring 70% of the water and the water reducing agent, stirring for 2-4 minutes, adding the rest of water and the water reducing agent, continuously stirring for 3-5 minutes, finally adding the steel fibers, and stirring for 2-4 minutes to obtain the ultra-high performance concrete. Under the condition that the performance completely meets the requirements of the evacuation platform,the production cost is greatly reduced.
本发明涉及一种超高性能混凝土及其制备方法，该超高性能混凝土包含以下组份：水泥30‑35％、混合石英砂40‑45％、掺合料8‑12％、钢纤维3‑5％、其余为水；所述混合石英砂采用SiO2含量大于97％的石英砂,包括以下组份：粗粒径石英砂48‑52％、中粒径石英砂28‑32％、细粒径石英砂18‑22％；所述掺合料包括以下组份：硅灰和矿粉共55‑65％、减水剂35‑45％；该制备方法包括以下步骤：先将水泥、混合石英砂、硅灰、矿粉干拌30s后倒入70％的水和减水剂，搅拌2‑4min，再加入剩余的水和减水剂，继续搅拌3‑5min，最后加入钢纤维，搅拌2‑4min，得到超高性能混凝土；本发明能在性能完全满足疏散平台的要求下，大大降低生产成本。
Ultra-high performance concrete and preparation method thereof
The invention relates to ultra-high performance concrete and a preparation method thereof. The ultra-high performance concrete comprises the following components: 30-35% of cement, 40-45% of mixed quartz sand, 8-12% of admixture, 3-5% of steel fiber and the balance of water. The mixed quartz sand is quartz sand with SiO2 content greater than 97%, and comprises the following components: 48-52% of coarse-particle-size quartz sand, 28-32% of medium-particle-size quartz sand and 18-22% of fine-particle-size quartz sand; the admixture comprises the following components: 55-65% of silica fume and mineral powder and 35-45% of a water reducing agent; and the preparation method comprises the following steps: carrying out dry mixing on the cement, mixed quartz sand, silica fume and mineral powder for 30 seconds, pouring 70% of the water and the water reducing agent, stirring for 2-4 minutes, adding the rest of water and the water reducing agent, continuously stirring for 3-5 minutes, finally adding the steel fibers, and stirring for 2-4 minutes to obtain the ultra-high performance concrete. Under the condition that the performance completely meets the requirements of the evacuation platform,the production cost is greatly reduced.
本发明涉及一种超高性能混凝土及其制备方法，该超高性能混凝土包含以下组份：水泥30‑35％、混合石英砂40‑45％、掺合料8‑12％、钢纤维3‑5％、其余为水；所述混合石英砂采用SiO2含量大于97％的石英砂,包括以下组份：粗粒径石英砂48‑52％、中粒径石英砂28‑32％、细粒径石英砂18‑22％；所述掺合料包括以下组份：硅灰和矿粉共55‑65％、减水剂35‑45％；该制备方法包括以下步骤：先将水泥、混合石英砂、硅灰、矿粉干拌30s后倒入70％的水和减水剂，搅拌2‑4min，再加入剩余的水和减水剂，继续搅拌3‑5min，最后加入钢纤维，搅拌2‑4min，得到超高性能混凝土；本发明能在性能完全满足疏散平台的要求下，大大降低生产成本。
Ultra-high performance concrete and preparation method thereof
一种超高性能混凝土及其制备方法
LI JINLONG (author)
2021-03-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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