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High-toughness ultra-high performance concrete doped with metakaolin and magnesium oxide and preparation method thereof
The invention discloses high-toughness ultra-high performance concrete doped with metakaolin and magnesium oxide. The components are mixed according to the following mass ratio; wherein the ratio of the ordinary Portland cement to the metakaolin to the magnesium oxide to the silica fume to the quartz powder to the water reducing agent to the water to the quartz sand is 1: (0.05-0.2): (0.05-0.2): (0.25-0.45): (0.3-0.5): (0.02-0.04): (0.3-0.4): (1.2-1.5), and the volume mixing amount of the steel fibers is 0.5%-3%. The flexural strength of the concrete is greatly improved compared with that of ultra-high performance concrete with the same water-binder ratio, glue-sand ratio and steel fiber mixing amount. In the practical application of the ultra-high performance concrete, due to the high breaking strength, the steel bar consumption can be reduced, even no steel bar is matched, and the material cost and the labor cost can be reduced. Ordinary Portland cement produces pollution in the production process, and metakaolin and magnesium oxide are used for replacing part of ordinary Portland cement, so that environmental protection is facilitated.
本发明公开了一种掺偏高岭土和氧化镁的高韧性超高性能混凝土，各组分按以下质量比混合，普通硅酸盐水泥：偏高岭土：氧化镁：硅灰：石英粉：减水剂：水：石英砂=1：0.05~0.2：0.05~0.2：0.25~0.45：0.3~0.5：0.02~0.04：0.3~0.4：1.2~1.5，钢纤维体积掺量为0.5~3%。本发明混凝土的抗折强度比相同水胶比、胶砂比、钢纤维掺量的超高性能混凝土有很大的提高。在超高性能混凝土的实际应用中，由于较高的抗折强度能够减少钢筋用量，甚至不配钢筋，有利于降低材料费用和人工成本。普通硅酸盐水泥在生产过程中产生污染，用偏高岭土和氧化镁取代部分普通硅酸盐水泥，有利于保护环境。
High-toughness ultra-high performance concrete doped with metakaolin and magnesium oxide and preparation method thereof
The invention discloses high-toughness ultra-high performance concrete doped with metakaolin and magnesium oxide. The components are mixed according to the following mass ratio; wherein the ratio of the ordinary Portland cement to the metakaolin to the magnesium oxide to the silica fume to the quartz powder to the water reducing agent to the water to the quartz sand is 1: (0.05-0.2): (0.05-0.2): (0.25-0.45): (0.3-0.5): (0.02-0.04): (0.3-0.4): (1.2-1.5), and the volume mixing amount of the steel fibers is 0.5%-3%. The flexural strength of the concrete is greatly improved compared with that of ultra-high performance concrete with the same water-binder ratio, glue-sand ratio and steel fiber mixing amount. In the practical application of the ultra-high performance concrete, due to the high breaking strength, the steel bar consumption can be reduced, even no steel bar is matched, and the material cost and the labor cost can be reduced. Ordinary Portland cement produces pollution in the production process, and metakaolin and magnesium oxide are used for replacing part of ordinary Portland cement, so that environmental protection is facilitated.
本发明公开了一种掺偏高岭土和氧化镁的高韧性超高性能混凝土，各组分按以下质量比混合，普通硅酸盐水泥：偏高岭土：氧化镁：硅灰：石英粉：减水剂：水：石英砂=1：0.05~0.2：0.05~0.2：0.25~0.45：0.3~0.5：0.02~0.04：0.3~0.4：1.2~1.5，钢纤维体积掺量为0.5~3%。本发明混凝土的抗折强度比相同水胶比、胶砂比、钢纤维掺量的超高性能混凝土有很大的提高。在超高性能混凝土的实际应用中，由于较高的抗折强度能够减少钢筋用量，甚至不配钢筋，有利于降低材料费用和人工成本。普通硅酸盐水泥在生产过程中产生污染，用偏高岭土和氧化镁取代部分普通硅酸盐水泥，有利于保护环境。
High-toughness ultra-high performance concrete doped with metakaolin and magnesium oxide and preparation method thereof
一种掺偏高岭土和氧化镁的高韧性超高性能混凝土及其制备方法
JI TAO (author) / ZHANG QILIN (author) / LIANG YONGNING (author)
2020-06-05
Patent
Electronic Resource
Chinese
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