Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
C50 second-generation recycled concrete suitable for severe cold areas and preparation method thereof
The invention discloses C50 second-generation recycled concrete suitable for severe cold areas and a preparation method of the C50 second-generation recycled concrete. The recycled concrete is prepared from the following raw materials in parts by weight: 385 to 400 parts of cement, 5 to 10 parts of nano silicon dioxide, 65 to 75 parts of silica fume, 660 to 680 parts of river sand, 900 to 920 parts of second-generation recycled coarse aggregate, 5 to 7 parts of basalt fiber, 130 to 150 parts of water, 2.3 parts of a water reducing agent, 0.02 part of a de-foaming agent and 0.02 to 0.04 part of an air entraining agent. Waste recycled concrete is crushed into second-generation recycled coarse aggregate to be used in concrete, the problem of resource shortage is effectively relieved, carbon emission can be reduced, green and healthy development of the building industry is promoted, nano silicon dioxide and silica fume are used in a combined mode, the crack resistance of the recycled concrete is enhanced in a synergistic mode, and the service life of the recycled concrete is prolonged. Meanwhile, basalt fibers are added in a matched manner, so that the integrality of the recycled concrete is improved, cracks caused by hydration heat can be inhibited to a certain extent, and the obvious defects of the second-generation recycled coarse aggregate are improved.
本发明公开了一种适用于严寒地区的C50二代再生混凝土及其制备方法，所述再生混凝土由以下原料按重量份组成：水泥385～400份，纳米二氧化硅5～10份，硅灰65～75份，河砂660～680份，二代再生粗骨料900～920份，玄武岩纤维5～7份，水130～150份，减水剂2.3份、消泡剂0.02份和引气剂0.02～0.04份。本发明通过将废弃的再生混凝土破碎成二代再生粗骨料再用于混凝土中，有效缓解了资源短缺问题，还能减少碳排放，促进建筑行业的绿色健康发展，联合使用纳米二氧化硅和硅灰，协同增强了再生混凝土的抗裂性能，同时配合添加玄武岩纤维，提高了再生混凝土的整体性，可在一定程度上抑制水化热导致的裂纹，改善了二代再生粗骨料的明显缺陷。
C50 second-generation recycled concrete suitable for severe cold areas and preparation method thereof
The invention discloses C50 second-generation recycled concrete suitable for severe cold areas and a preparation method of the C50 second-generation recycled concrete. The recycled concrete is prepared from the following raw materials in parts by weight: 385 to 400 parts of cement, 5 to 10 parts of nano silicon dioxide, 65 to 75 parts of silica fume, 660 to 680 parts of river sand, 900 to 920 parts of second-generation recycled coarse aggregate, 5 to 7 parts of basalt fiber, 130 to 150 parts of water, 2.3 parts of a water reducing agent, 0.02 part of a de-foaming agent and 0.02 to 0.04 part of an air entraining agent. Waste recycled concrete is crushed into second-generation recycled coarse aggregate to be used in concrete, the problem of resource shortage is effectively relieved, carbon emission can be reduced, green and healthy development of the building industry is promoted, nano silicon dioxide and silica fume are used in a combined mode, the crack resistance of the recycled concrete is enhanced in a synergistic mode, and the service life of the recycled concrete is prolonged. Meanwhile, basalt fibers are added in a matched manner, so that the integrality of the recycled concrete is improved, cracks caused by hydration heat can be inhibited to a certain extent, and the obvious defects of the second-generation recycled coarse aggregate are improved.
本发明公开了一种适用于严寒地区的C50二代再生混凝土及其制备方法，所述再生混凝土由以下原料按重量份组成：水泥385～400份，纳米二氧化硅5～10份，硅灰65～75份，河砂660～680份，二代再生粗骨料900～920份，玄武岩纤维5～7份，水130～150份，减水剂2.3份、消泡剂0.02份和引气剂0.02～0.04份。本发明通过将废弃的再生混凝土破碎成二代再生粗骨料再用于混凝土中，有效缓解了资源短缺问题，还能减少碳排放，促进建筑行业的绿色健康发展，联合使用纳米二氧化硅和硅灰，协同增强了再生混凝土的抗裂性能，同时配合添加玄武岩纤维，提高了再生混凝土的整体性，可在一定程度上抑制水化热导致的裂纹，改善了二代再生粗骨料的明显缺陷。
C50 second-generation recycled concrete suitable for severe cold areas and preparation method thereof
一种适用于严寒地区的C50二代再生混凝土及其制备方法
ZHU PINGHUA (Autor:in) / WANG HUAYU (Autor:in) / YAN XIANCUI (Autor:in) / YANG LEI (Autor:in) / ZHU LEI (Autor:in) / WANG XINJIE (Autor:in)
06.02.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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