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形状记忆合金(SMA)驱动下热熔胶水泥基材料具有优良的自修复能力。本文对聚酰胺热熔胶水泥砂浆(PA砂浆)的工作性能、力学性能和耐久性能以及处于多次热循环条件下PA砂浆的力学性能及耐久性能进行了研究。结果表明,体积掺量1%、3%和5%热熔胶的掺入没有降低砂浆的工作性能,反而有略微的提升;随聚酰胺(PA)掺量的增加,砂浆的抗压强度和抗渗性能略有下降,而抗折强度随掺量的增加先增后减;热循环环境中PA水泥砂浆的力学性能与耐久性能都得到了很大的提升,说明PA水泥砂浆在常温马氏体状态、具有预应变的SMA的驱动下具备反复修复水泥基裂缝的潜力。
Shape memory alloy (SMA) driven hot melt cement-based materials with excellent self-healing ability. In this paper, the work performance, mechanical properties and durability of polyamide hot melt adhesive mortar (PA mortar) and the mechanical properties and durability of PA mortar under multiple thermal cycling conditions were studied. The results showed that the incorporation of 1%, 3% and 5% hot melt adhesive did not decrease the workability of mortar but increased slightly. With the increase of polyamide (PA) content, the compressive strength Impermeability slightly decreased, while the flexural strength first increased and then decreased with the increase of dosage; PA cycle in the thermal and mechanical properties of cement mortar have been greatly improved, indicating that PA mortar at room temperature Markov The state of the body, with the pre-strained SMA, has the potential to repair cement-based cracks repeatedly.