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A platform for research: civil engineering, architecture and urbanism
High-strength fiber recycled concrete and preparation method thereof
The invention belongs to the technical field of recycled concrete, and particularly relates to high-strength fiber recycled concrete and a preparation method thereof. The high-strength fiber recycled concrete comprises the following components: 250-400 parts of cement, 800-1000 parts of modified recycled aggregate, 50-100 parts of fly ash, 2-6 parts of a water reducing agent, 20-60 parts of steel fiber and 150-250 parts of water, and the modified recycled aggregate is prepared through calcium ion-containing promotion liquid treatment, dopamine polymerization treatment and nanofiber modification in sequence. By modifying the recycled aggregate, the compactness and strength of the surface of the recycled aggregate are improved, the water absorption rate is reduced, the quality of an interface transition area is improved, the interface bonding force between the aggregate and cement paste is enhanced, the surface of the aggregate is endowed with certain self-repairing capacity, the mechanical performance of the surface of the aggregate is improved, and the bonding force between the surface of the aggregate and the cement paste is enhanced; meanwhile, the nanofibers are uniformly distributed on the surface of the aggregate, so that the overall mechanical property of the concrete is improved.
本发明属于再生混凝土技术领域，更具体的，是涉及一种高强度纤维再生混凝土及其制备方法。所述高强度纤维再生混凝土组分包括水泥250～400份、改性再生骨料800～1000份、粉煤灰50～100份、减水剂2～6份、钢纤维20～60份和水150～250份，其中，改性再生骨料依次经含钙离子促进液处理、多巴胺聚合处理和纳米纤维改性制备得到。通过对再生骨料进行改性处理，改善了再生骨料表面的致密性和强度，减少吸水率，改善界面过渡区的质量，增强骨料与水泥浆体之间的界面粘结力，并赋予骨料表面一定的自修复能力，提高骨料表面的机械性能，增强其与水泥浆体的结合力，同时纳米纤维均匀分布于骨料表面，进而提高混凝土的整体力学性能。
High-strength fiber recycled concrete and preparation method thereof
The invention belongs to the technical field of recycled concrete, and particularly relates to high-strength fiber recycled concrete and a preparation method thereof. The high-strength fiber recycled concrete comprises the following components: 250-400 parts of cement, 800-1000 parts of modified recycled aggregate, 50-100 parts of fly ash, 2-6 parts of a water reducing agent, 20-60 parts of steel fiber and 150-250 parts of water, and the modified recycled aggregate is prepared through calcium ion-containing promotion liquid treatment, dopamine polymerization treatment and nanofiber modification in sequence. By modifying the recycled aggregate, the compactness and strength of the surface of the recycled aggregate are improved, the water absorption rate is reduced, the quality of an interface transition area is improved, the interface bonding force between the aggregate and cement paste is enhanced, the surface of the aggregate is endowed with certain self-repairing capacity, the mechanical performance of the surface of the aggregate is improved, and the bonding force between the surface of the aggregate and the cement paste is enhanced; meanwhile, the nanofibers are uniformly distributed on the surface of the aggregate, so that the overall mechanical property of the concrete is improved.
本发明属于再生混凝土技术领域，更具体的，是涉及一种高强度纤维再生混凝土及其制备方法。所述高强度纤维再生混凝土组分包括水泥250～400份、改性再生骨料800～1000份、粉煤灰50～100份、减水剂2～6份、钢纤维20～60份和水150～250份，其中，改性再生骨料依次经含钙离子促进液处理、多巴胺聚合处理和纳米纤维改性制备得到。通过对再生骨料进行改性处理，改善了再生骨料表面的致密性和强度，减少吸水率，改善界面过渡区的质量，增强骨料与水泥浆体之间的界面粘结力，并赋予骨料表面一定的自修复能力，提高骨料表面的机械性能，增强其与水泥浆体的结合力，同时纳米纤维均匀分布于骨料表面，进而提高混凝土的整体力学性能。
High-strength fiber recycled concrete and preparation method thereof
一种高强度纤维再生混凝土及其制备方法
WANG XINZHONG (author) / XIANG YI (author) / WU YUEXING (author) / TAN XIANLIANG (author) / LI LINSHU (author) / SUN YUWEN (author) / ZHOU BIAO (author) / CHENG WEIDONG (author) / ZHANG LEI (author)
2024-12-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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