Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ultrahigh-strength and ultrahigh-toughness concrete and preparation method thereof
The invention relates to ultrahigh-strength ultrahigh-toughness concrete and a preparation method thereof. The concrete is prepared by mixing the following raw materials: cement, silica fume, nano calcium carbonate, fine aggregate, water, a polycarboxylate water reducer and steel fibers. wherein a weight part ratio of cement to silica fume to nano calcium carbonate to fine aggregate to water to polycarboxylate water reducer is (92-100):(20-30):(1-5):(100-110):(10-25):(2-5), and the volume mixing amount of the steel fibers in the ultrahigh-strength ultrahigh-toughness concrete is 1-4%. According to the invention, steel fibers and nano CaCO3 are doped in ultrahigh-strength and ultrahigh-toughness concrete, so that the reinforcing and toughening effects of the steel fibers on the UHPC are ensured in the macroscopic aspect, the compactness of the ultrahigh-strength and ultrahigh-toughness concrete is improved in the nano/micro aspect, the quality of hydration products in the concrete is improved, and finally, the fiber-matrix cohesiveness and the strength and toughness of the hardened ultrahigh-strength ultrahigh-toughness concrete are remarkably improved.
一种超高强超高韧性混凝土及其制备方法，该混凝土由以下原料混配制成：水泥、硅灰、纳米碳酸钙、细骨料、水、聚羧酸盐减水剂和钢纤维；所述水泥、硅灰、细骨料、水和聚羧酸盐减水剂的重量份配比分别为：水泥92~100份，硅灰20~30份，纳米碳酸钙1~5份，细骨料100~110份，水10~25份和聚羧酸盐减水剂2~5份；所述钢纤维在所述超高强超高韧性混凝土中的体积掺量为1~4%。本发明在超高强超高韧性混凝土内掺杂钢纤维和纳米CaCO3，宏观方面保证钢纤维对UHPC的增强增韧作用，纳/微观方面提高超高强超高韧性混凝土的密实度并改善混凝土内部的水化产物的质量，最终显著改善纤维‑基体粘结性及硬化超高强超高韧性混凝土的强度和韧性。
Ultrahigh-strength and ultrahigh-toughness concrete and preparation method thereof
The invention relates to ultrahigh-strength ultrahigh-toughness concrete and a preparation method thereof. The concrete is prepared by mixing the following raw materials: cement, silica fume, nano calcium carbonate, fine aggregate, water, a polycarboxylate water reducer and steel fibers. wherein a weight part ratio of cement to silica fume to nano calcium carbonate to fine aggregate to water to polycarboxylate water reducer is (92-100):(20-30):(1-5):(100-110):(10-25):(2-5), and the volume mixing amount of the steel fibers in the ultrahigh-strength ultrahigh-toughness concrete is 1-4%. According to the invention, steel fibers and nano CaCO3 are doped in ultrahigh-strength and ultrahigh-toughness concrete, so that the reinforcing and toughening effects of the steel fibers on the UHPC are ensured in the macroscopic aspect, the compactness of the ultrahigh-strength and ultrahigh-toughness concrete is improved in the nano/micro aspect, the quality of hydration products in the concrete is improved, and finally, the fiber-matrix cohesiveness and the strength and toughness of the hardened ultrahigh-strength ultrahigh-toughness concrete are remarkably improved.
一种超高强超高韧性混凝土及其制备方法，该混凝土由以下原料混配制成：水泥、硅灰、纳米碳酸钙、细骨料、水、聚羧酸盐减水剂和钢纤维；所述水泥、硅灰、细骨料、水和聚羧酸盐减水剂的重量份配比分别为：水泥92~100份，硅灰20~30份，纳米碳酸钙1~5份，细骨料100~110份，水10~25份和聚羧酸盐减水剂2~5份；所述钢纤维在所述超高强超高韧性混凝土中的体积掺量为1~4%。本发明在超高强超高韧性混凝土内掺杂钢纤维和纳米CaCO3，宏观方面保证钢纤维对UHPC的增强增韧作用，纳/微观方面提高超高强超高韧性混凝土的密实度并改善混凝土内部的水化产物的质量，最终显著改善纤维‑基体粘结性及硬化超高强超高韧性混凝土的强度和韧性。
Ultrahigh-strength and ultrahigh-toughness concrete and preparation method thereof
一种超高强超高韧性混凝土及其制备方法
WU ZEMEI (Autor:in) / SHI CAIJUN (Autor:in) / HU XIANG (Autor:in) / LIU JIANHUI (Autor:in) / OUYANG XUE (Autor:in)
21.12.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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