Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Modified recycled aggregate as well as preparation method and application thereof
The invention belongs to the technical field of building materials, and discloses modified recycled aggregate as well as a preparation method and application thereof. The preparation method of the modified recycled aggregate comprises the following steps: soaking the recycled aggregate in a calcium-containing alkaline solution, then adding tetraethoxysilane and tetrabutyl titanate, then adding a plant active silica compound, then carrying out a hydrothermal reaction, filtering, and then uniformly dispersing mineralized bacteria on the surface of a filtered substance, thereby obtaining the modified recycled aggregate. The saturated surface dry water absorption rate of the prepared modified recycled aggregate is greatly reduced compared with that before modification, and compared with concrete prepared from unmodified aggregate, the slump, 28d compressive strength and impermeability of recycled aggregate concrete prepared from the modified recycled aggregate are obviously improved. In conclusion, the modified recycled aggregate prepared by the invention realizes resource utilization and performance optimization, which is of great significance to environmental protection, low-carbon development and concrete sustainable development.
本发明属于建筑材料技术领域，公开了一种改性再生骨料及其制备方法和应用。本发明改性再生骨料的制备方法包括以下步骤：将再生骨料浸泡在含钙的碱性溶液中，然后加入正硅酸乙酯和钛酸四丁酯，再加入植物活性硅氧化合物后进行水热反应，过滤后将矿化菌均匀分散于滤出物表面即得。本发明制备的改性再生骨料比改性前的饱和面干吸水率大幅降低，而且相比未改性骨料制备的混凝土，以本发明改性再生骨料制备的再生骨料混凝土的坍落度、28d抗压强度和抗渗性均出现明显提高。综上，本发明制备的改性再生骨料实现了资源化利用和性能优化，这对于环境保护、低碳发展和混凝土可持续发展具有重要意义。
Modified recycled aggregate as well as preparation method and application thereof
The invention belongs to the technical field of building materials, and discloses modified recycled aggregate as well as a preparation method and application thereof. The preparation method of the modified recycled aggregate comprises the following steps: soaking the recycled aggregate in a calcium-containing alkaline solution, then adding tetraethoxysilane and tetrabutyl titanate, then adding a plant active silica compound, then carrying out a hydrothermal reaction, filtering, and then uniformly dispersing mineralized bacteria on the surface of a filtered substance, thereby obtaining the modified recycled aggregate. The saturated surface dry water absorption rate of the prepared modified recycled aggregate is greatly reduced compared with that before modification, and compared with concrete prepared from unmodified aggregate, the slump, 28d compressive strength and impermeability of recycled aggregate concrete prepared from the modified recycled aggregate are obviously improved. In conclusion, the modified recycled aggregate prepared by the invention realizes resource utilization and performance optimization, which is of great significance to environmental protection, low-carbon development and concrete sustainable development.
本发明属于建筑材料技术领域，公开了一种改性再生骨料及其制备方法和应用。本发明改性再生骨料的制备方法包括以下步骤：将再生骨料浸泡在含钙的碱性溶液中，然后加入正硅酸乙酯和钛酸四丁酯，再加入植物活性硅氧化合物后进行水热反应，过滤后将矿化菌均匀分散于滤出物表面即得。本发明制备的改性再生骨料比改性前的饱和面干吸水率大幅降低，而且相比未改性骨料制备的混凝土，以本发明改性再生骨料制备的再生骨料混凝土的坍落度、28d抗压强度和抗渗性均出现明显提高。综上，本发明制备的改性再生骨料实现了资源化利用和性能优化，这对于环境保护、低碳发展和混凝土可持续发展具有重要意义。
Modified recycled aggregate as well as preparation method and application thereof
一种改性再生骨料及其制备方法和应用
XIN XIAOBIN (Autor:in) / LI XIAONAN (Autor:in) / ZHANG MAOLIANG (Autor:in) / MA YAN (Autor:in) / CAO KAI (Autor:in) / LI JIANWEI (Autor:in) / KONG CHUAN (Autor:in) / GUO WENQING (Autor:in) / WEI HAIFENG (Autor:in) / LI ZHENKANG (Autor:in)
21.07.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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