Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses high-performance crack-resistant impact-resistant modified concrete and a preparation method thereof. Reinforcing fibers are doped into the concrete, and the reinforcing fibersare composed of modified polypropylene crude fibers and modified polyacrylonitrile fibers with different sizes. In the present invention, the modified polyacrylonitrile fibers can improve the stressresistance of the early-stage concrete, prevent generation of early cracks and improve early-stage anti-cracking performance of the concrete; the modified polyacrylonitrile fibers can be used for increasing the absorption of stress energy to the outside so that the impact energy absorption of the whole concrete is improved and the impact resistance of the concrete is improved. The contact area between the modified polypropylene crude fibers and concrete is increased; the rough fiber surface enables the modified concrete to absorb more energy in the later damage process, so that the purpose oftoughening is achieved, and the change of the concrete from brittle failure to toughness failure is realized. The two fibers play different roles in common concrete, and finally, the modified concretewith good crack resistance and impact resistance is obtained.
本发明公开了一种高性能抗裂抗冲击改性混凝土及其制备方法，混凝土中掺入了增强纤维，所述增强纤维由尺寸不同的改性聚丙烯粗纤维和改性聚丙烯腈纤维组成。本发明中，改性聚丙烯腈纤维可以提高早期混凝土抵抗应力的能力，阻止早期裂缝产生，提高混凝土早期的抗裂性能，且改性聚丙烯腈纤维可对外增加应力能量的吸收，提高整体混凝土对冲击能量的吸收，从而提高混凝土的抗冲击能力，改性聚丙烯粗纤维增加了其与混凝土的接触面积，粗糙的纤维表面使得改性混凝土在后期破坏的过程中吸收更多的能量，从而达到增韧的目的，实现混凝土从脆性破坏到韧性破坏的改变，两种纤维在普通混凝土中发挥不同作用，最终通过得到抗裂抗冲击性能好的改性混凝土。
The invention discloses high-performance crack-resistant impact-resistant modified concrete and a preparation method thereof. Reinforcing fibers are doped into the concrete, and the reinforcing fibersare composed of modified polypropylene crude fibers and modified polyacrylonitrile fibers with different sizes. In the present invention, the modified polyacrylonitrile fibers can improve the stressresistance of the early-stage concrete, prevent generation of early cracks and improve early-stage anti-cracking performance of the concrete; the modified polyacrylonitrile fibers can be used for increasing the absorption of stress energy to the outside so that the impact energy absorption of the whole concrete is improved and the impact resistance of the concrete is improved. The contact area between the modified polypropylene crude fibers and concrete is increased; the rough fiber surface enables the modified concrete to absorb more energy in the later damage process, so that the purpose oftoughening is achieved, and the change of the concrete from brittle failure to toughness failure is realized. The two fibers play different roles in common concrete, and finally, the modified concretewith good crack resistance and impact resistance is obtained.
本发明公开了一种高性能抗裂抗冲击改性混凝土及其制备方法，混凝土中掺入了增强纤维，所述增强纤维由尺寸不同的改性聚丙烯粗纤维和改性聚丙烯腈纤维组成。本发明中，改性聚丙烯腈纤维可以提高早期混凝土抵抗应力的能力，阻止早期裂缝产生，提高混凝土早期的抗裂性能，且改性聚丙烯腈纤维可对外增加应力能量的吸收，提高整体混凝土对冲击能量的吸收，从而提高混凝土的抗冲击能力，改性聚丙烯粗纤维增加了其与混凝土的接触面积，粗糙的纤维表面使得改性混凝土在后期破坏的过程中吸收更多的能量，从而达到增韧的目的，实现混凝土从脆性破坏到韧性破坏的改变，两种纤维在普通混凝土中发挥不同作用，最终通过得到抗裂抗冲击性能好的改性混凝土。
High-performance crack-resistant impact-resistant modified concrete and preparation method thereof
一种高性能抗裂抗冲击改性混凝土及其制备方法
JI HANQI (Autor:in)
28.08.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
D01D
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
,
Mechanische Verfahren oder Vorrichtungen für die Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
/
D01F
Chemische Gesichtspunkte bei der Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
,
CHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
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