聚氨酯混凝土在强碱环境下的耐碱性能试验研究

章 文; 杜英歌; 杨光耀; 许海东; 房昕宇; 朱宗山; 冷 冰

doi:10.70693/cjst.v2i3.2053

Authors

章文北华大学
杜英歌北华大学
杨光耀北华大学
许海东北华大学
房昕宇北华大学
朱宗山北华大学
冷冰北华大学

DOI:

https://doi.org/10.70693/cjst.v2i3.2053

Keywords:

聚氨酯混凝土, NaOH溶液, 耐碱性能, 性能保持, 结构表征

Abstract

为评价聚氨酯混凝土（PUC）在强碱环境下的耐腐蚀性能及结构稳定性，采用质量分数10%的NaOH溶液对PUC试件进行3 d、7 d、14 d和28 d浸泡试验，并通过宏观形貌、质量变化率、抗压强度保持率、XRD和FTIR分析其性能变化。结果表明：浸泡28 d后，试件表面未出现明显变色、起皮、剥落、裂缝及边角破损；3 d、7 d、14 d和28 d的质量变化率分别为0.18%、0.17%、0.18%和0.26%，整体变化较小；抗压强度保持率分别为99.36%、98.30%、95.86%和93.30%，虽随浸泡时间延长有所降低，但28 d后仍高于90%。XRD和FTIR结果显示，浸泡前后主要物相和特征官能团变化不明显，未发现明显新物相生成或官能团结构破坏。综合分析可知，在10% NaOH溶液短期浸泡条件下，PUC具有较好的质量稳定性和抗压性能保持能力，但其长期耐碱性能仍需进一步验证。

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