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Shrinkage-resistant ultrahigh-toughness concrete and preparation method thereof
The invention discloses shrinkage-resistant ultrahigh-toughness concrete (STC) and a preparation method thereof. The concrete is prepared from the following materials in parts by mass: 800 parts of cement, 1000-1040 parts of fine aggregate, 250-280 parts of mineral admixture, 20-24 parts of nano material, 180-200 parts of steel fiber, 3-5 parts of internal curing agent, 12-16 parts of water reducing agent and 270-280 parts of water, nanometer calcium carbonate is doped into the concrete, so that the mixing amount of silica fume is reduced, and the concrete performance is ensured; the super absorbent resin is doped, and the additional water-binder ratio is increased so that the shrinkage of the concrete is reduced, and the concrete can be used for internal self-curing; meanwhile, cement with high dicalcium silicate content, coal ash, steel fiber and other materials are added so that early shrinkage of the concrete can be inhibited; in the preparation process, the steel fibers are dispersed uniformly and distributed disorderly under the assistance of a steel fiber disperser; the steel fibers can be strongly dispersed in the admixture through dry mixing and then wet mixing, and the dispersity is good; vibration stirring is adopted in the wet mixing process to enhance the movement of admixture particles to damage the cohesive cement and fiber agglomerates, and the mixing is more uniform.
本发明公开了一种抗收缩超高韧性混凝土(STC)及制备方法。由以下质量份数的材料制成：水泥800份，细集料1000～1040份，矿物掺合料250～280份，纳米材料20～24份，钢纤维180～200份，内养护剂3～5份，减水剂12～16份，水270～280份；本发明混凝土掺加纳米碳酸钙，降低硅灰掺量，保证混凝土性能；掺加高吸水树脂，增加附加水胶比，既减小了混凝土收缩，又可用于内部自养护；同时加入硅酸二钙含量偏高的水泥及粉煤灰、钢纤维等材料可抑制混凝土早期收缩；制备中，钢纤维采用钢纤维分散器辅助保证钢纤维分散均匀且乱向分布；先干拌后湿拌可保证钢纤维在掺合料中被强烈分散，分散性好；湿拌中采用振动搅拌增强掺料颗粒运动破坏黏聚的水泥、纤维团，拌合更均匀。
Shrinkage-resistant ultrahigh-toughness concrete and preparation method thereof
The invention discloses shrinkage-resistant ultrahigh-toughness concrete (STC) and a preparation method thereof. The concrete is prepared from the following materials in parts by mass: 800 parts of cement, 1000-1040 parts of fine aggregate, 250-280 parts of mineral admixture, 20-24 parts of nano material, 180-200 parts of steel fiber, 3-5 parts of internal curing agent, 12-16 parts of water reducing agent and 270-280 parts of water, nanometer calcium carbonate is doped into the concrete, so that the mixing amount of silica fume is reduced, and the concrete performance is ensured; the super absorbent resin is doped, and the additional water-binder ratio is increased so that the shrinkage of the concrete is reduced, and the concrete can be used for internal self-curing; meanwhile, cement with high dicalcium silicate content, coal ash, steel fiber and other materials are added so that early shrinkage of the concrete can be inhibited; in the preparation process, the steel fibers are dispersed uniformly and distributed disorderly under the assistance of a steel fiber disperser; the steel fibers can be strongly dispersed in the admixture through dry mixing and then wet mixing, and the dispersity is good; vibration stirring is adopted in the wet mixing process to enhance the movement of admixture particles to damage the cohesive cement and fiber agglomerates, and the mixing is more uniform.
本发明公开了一种抗收缩超高韧性混凝土(STC)及制备方法。由以下质量份数的材料制成：水泥800份，细集料1000～1040份，矿物掺合料250～280份，纳米材料20～24份，钢纤维180～200份，内养护剂3～5份，减水剂12～16份，水270～280份；本发明混凝土掺加纳米碳酸钙，降低硅灰掺量，保证混凝土性能；掺加高吸水树脂，增加附加水胶比，既减小了混凝土收缩，又可用于内部自养护；同时加入硅酸二钙含量偏高的水泥及粉煤灰、钢纤维等材料可抑制混凝土早期收缩；制备中，钢纤维采用钢纤维分散器辅助保证钢纤维分散均匀且乱向分布；先干拌后湿拌可保证钢纤维在掺合料中被强烈分散，分散性好；湿拌中采用振动搅拌增强掺料颗粒运动破坏黏聚的水泥、纤维团，拌合更均匀。
Shrinkage-resistant ultrahigh-toughness concrete and preparation method thereof
一种抗收缩超高韧性混凝土及制备方法
QI TAO (author) / XIA WEIXUE (author) / ZHANG XIAOLEI (author) / CHEN YANG (author) / LI MINGXING (author) / SHAO BAOGUO (author) / WU JIA (author) / LIU QINGMING (author)
2022-01-21
Patent
Electronic Resource
Chinese
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