Recycled concrete with self-repairing performance: Fid-Bau Portal

Recycled concrete with self-repairing performance

FAN WENBO / JIANG SHOUHENG

The invention relates to recycled concrete with self-repairing performance, and belongs to the technical field of recycled concrete. The recycled aggregate is modified through heteropolyacid and phosphomolybdic acid, protons in phosphomolybdic acid can be combined with oxygen atoms in heteropolyacid at room temperature to form coordinate bonds, and the bonding is reversible bonding reaction, so that when the heteropolyacid and phosphomolybdic acid modify the recycled aggregate at the same time, the recycled aggregate is endowed with the characteristic of reversible bonding, and the recycled aggregate has the characteristic of reversible bonding. Therefore, the self-repairing performance is achieved. When the recycled concrete cracks, the modified aggregate can realize self-repairing through reversible bonding. The heteropolyacid anions play a role of a cross-linking agent, the number of charges of the polyacid anions is increased, cross-linking points are more concentrated, force conduction is improved when the material is stressed, and the tensile property of the recycled concrete is enhanced.

本发明涉及一种具有自修复性能的再生混凝土，属于再生混凝土技术领域。通过杂多酸和磷钼酸对再生骨料改性实现，磷钼酸中的质子可以在室温下与杂多酸中的氧原子结合形成配位键，这种键合是可逆键合反应，因此当杂多酸和磷钼酸同时对再生骨料进行改性时，再生骨料被赋予了该可逆键合的特性，就具有了自修复性能。当再生混凝土开裂，改性骨料通过可逆键合就可实现自修复。杂多酸阴离子起到交联剂的作用，增加多酸阴离子的电荷数，交联点更集中，增加了材料受力时力的传导，增强了再生混凝土的抗拉伸性能。

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