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Comparative evaluation of laboratory methods for performance assessment of cementitious materials in wastewater networks: Biological and chemical tests versus field exposure
Cement and Concrete Research ( IF 10.9 ) Pub Date : 2024-11-30 , DOI: 10.1016/j.cemconres.2024.107741
Alexandra Bertron, Cyrill Grengg, Matthieu Peyre Lavigne, Holger Wack, Gregor J.G. Gluth, Amr Aboulela, Vanessa Sonois, Tilman Gehrke, Florian Mittermayr

The biodeterioration of concrete elements in sewer systems and their repair is of significant economic and societal concern. However, the available test methods to assess the performance of cementitious materials under the relevant conditions are insufficiently validated. In the present study, two biological test methods and a standardised chemical test were applied to two sewer repair mortars and a reference mortar, and the performances of these materials were compared in a severely deteriorating sewer environment. In both biological tests, the induction period was considerably shorter than that of the field, and time-resolved recording of durability indicators enabled to determine deterioration rates in the steady-state regime, which compared reasonably well with each other and with the behaviour in the sewer environment. The chemical test does not allow to obtain a deterioration rate, and the observed relative performance differences of the mortars deviated from the results of the biological tests.

中文翻译:


废水管网中水泥材料性能评估的实验室方法比较评价:生物和化学测试与现场暴露



下水道系统中混凝土构件的生物劣化及其修复具有重大的经济和社会问题。然而,在相关条件下评估胶凝材料性能的可用测试方法尚未得到充分验证。在本研究中,对两种下水道修复砂浆和一种参考砂浆应用了两种生物测试方法和一种标准化化学测试,并比较了这些材料在严重恶化的下水道环境中的性能。在这两种生物测试中,诱导期都比田间的诱导期短得多,并且耐久性指标的时间分辨记录能够确定稳态状态下的劣化率,这与彼此以及与下水道环境中的行为相比相当好。化学测试不允许获得变质率,并且观察到的砂浆的相对性能差异与生物测试的结果不同。
更新日期:2024-11-30
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