Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cement-based composite material mixed with surface-modified steel fibers and preparation method of cement-based composite material
The invention provides a cement-based composite material mixed with surface modified steel fiber and a preparation method thereof. The cement-based composite material is prepared from the following raw materials: 300 to 750 parts of cement, 60 to 100 parts of fly ash, 80 to 200 parts of silica fume, 40 to 100 parts of mineral powder, 300 to 600 parts of coarse aggregate, 400 to 800 parts of fine aggregate, 10 to 60 parts of zinc oxide whisker, 50 to 200 parts of modified steel fiber, 150 to 200 parts of tap water and 8 to 25 parts of water reducing agent. CaCO3 particles are introduced into the modified steel fibers through surface mineralization treatment, on one hand, a large number of fixed sites are provided, and on the other hand, the fibers are endowed with surface roughness, hydrophilicity and affinity with cement mortar, so that the interfacial compatibility and binding force between the steel fibers and a cement matrix are improved, and the gravity effect of the steel fibers is overcome; and meanwhile, the low-density zinc oxide whiskers replace part of steel fibers, so that the gravity effect is also reduced. In addition, the dense filling effect of the zinc oxide whiskers further improves the internal microstructure of the concrete, reduces the generation of gaps, and improves the compactness of the concrete. According to the invention, the reinforced and toughened cement-based composite material with uniformly dispersed fibers is obtained.
本发明提供了一种混掺表面改性钢纤维的水泥基复合材料及制备方法，其原料组成包括水泥300‑750份，粉煤灰60‑100份，硅灰80‑200份，矿粉40‑100份，粗骨料300‑600份，细骨料400‑800份，氧化锌晶须10‑60份，改性钢纤维50‑200份，自来水150‑200份，减水剂8‑25份。所用改性钢纤维经过表面矿化处理引入CaCO3颗粒，一方面提供了大量固定位点，另一方面又赋予纤维表面粗糙度、亲水性及与水泥砂浆的亲和性，旨在改善钢纤维与水泥基体的界面相容性以及结合力，以克服钢纤维的重力效应；同时，低密度的氧化锌晶须取代部分钢纤维，也削减了重力效应。此外，氧化锌晶须的密实填充效应进一步改善了混凝土内部微结构，减少了空隙的产生，提高了混凝土致密性。本发明获得了纤维均匀分散及增强增韧的水泥基复合材料。
Cement-based composite material mixed with surface-modified steel fibers and preparation method of cement-based composite material
The invention provides a cement-based composite material mixed with surface modified steel fiber and a preparation method thereof. The cement-based composite material is prepared from the following raw materials: 300 to 750 parts of cement, 60 to 100 parts of fly ash, 80 to 200 parts of silica fume, 40 to 100 parts of mineral powder, 300 to 600 parts of coarse aggregate, 400 to 800 parts of fine aggregate, 10 to 60 parts of zinc oxide whisker, 50 to 200 parts of modified steel fiber, 150 to 200 parts of tap water and 8 to 25 parts of water reducing agent. CaCO3 particles are introduced into the modified steel fibers through surface mineralization treatment, on one hand, a large number of fixed sites are provided, and on the other hand, the fibers are endowed with surface roughness, hydrophilicity and affinity with cement mortar, so that the interfacial compatibility and binding force between the steel fibers and a cement matrix are improved, and the gravity effect of the steel fibers is overcome; and meanwhile, the low-density zinc oxide whiskers replace part of steel fibers, so that the gravity effect is also reduced. In addition, the dense filling effect of the zinc oxide whiskers further improves the internal microstructure of the concrete, reduces the generation of gaps, and improves the compactness of the concrete. According to the invention, the reinforced and toughened cement-based composite material with uniformly dispersed fibers is obtained.
本发明提供了一种混掺表面改性钢纤维的水泥基复合材料及制备方法，其原料组成包括水泥300‑750份，粉煤灰60‑100份，硅灰80‑200份，矿粉40‑100份，粗骨料300‑600份，细骨料400‑800份，氧化锌晶须10‑60份，改性钢纤维50‑200份，自来水150‑200份，减水剂8‑25份。所用改性钢纤维经过表面矿化处理引入CaCO3颗粒，一方面提供了大量固定位点，另一方面又赋予纤维表面粗糙度、亲水性及与水泥砂浆的亲和性，旨在改善钢纤维与水泥基体的界面相容性以及结合力，以克服钢纤维的重力效应；同时，低密度的氧化锌晶须取代部分钢纤维，也削减了重力效应。此外，氧化锌晶须的密实填充效应进一步改善了混凝土内部微结构，减少了空隙的产生，提高了混凝土致密性。本发明获得了纤维均匀分散及增强增韧的水泥基复合材料。
Cement-based composite material mixed with surface-modified steel fibers and preparation method of cement-based composite material
一种混掺表面改性钢纤维的水泥基复合材料及制备方法
GU WEIGUANG (Autor:in) / CHANG JOON-WON (Autor:in) / YANG SHUANGDI (Autor:in) / LIU LIANGHE (Autor:in) / ZHAN ZHONGHUA (Autor:in) / DENG QIAO (Autor:in) / LIANG HUILAI (Autor:in) / QIU HUANYU (Autor:in) / CHEN JUNJIE (Autor:in) / TIAN LI (Autor:in)
13.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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