溶液与粘合剂比率和度对早期氧化激活的渣粘合剂体积变化的影响
Maïté Lacante1, Brice Delsaute1, Stéphanie Staquet1
1BATir Department (LGC), Université libre de Bruxelles, 1050 Brussels, Belgium.
Materials (Basel, Switzerland)
|July 13, 2024
概括
活性废渣的体积变化和热膨胀比普通波特兰水泥更高. 调整溶液度和溶液与粘合剂比率 (S/B) 可以控制这些特性,为量身定制的材料性能提供潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 地质化学 地质化学
背景情况:
- 活性材料 (AAM) 为普通波特兰水泥 (OPC) 提供了可持续的替代品.
- 了解AAM的体积稳定性和热性质对于其实际应用至关重要.
- 活性渣 (AAS) 是有前途的结合剂,但它们的性能特征需要详细研究.
研究的目的:
- 为了研究溶液度和溶液与粘合剂比率 (S/B) 对活性的体积变化的影响.
- 在AAS中量化自身应变 (膨胀和收缩) 和热膨胀系数 (CTE).
- 为了比较AAS与OPC粘贴的性能.
主要方法:
- 定制的测试设备来监测自身应变和控制热变化.
- 平行测量热流和内部相对湿度 (IRH).
- 氧化激活渣的溶液度和S/B的系统变化.
主要成果:
- 与OPC糊相比,AAS显示出明显更高的自身菌株和CTE.
- 降低溶液度或S/B通常会降低自生菌株和CTE.
- 收缩范围在87至1981微米/米之间,而胀 (27至295微米/米) 仅发生在一半的组合中.
- CTE值达到了55μm/m/°C,这归因于性溶液的高CTE值.
- 仅仅是内部相对湿度无法完全解释观察到的自生菌株的发展.
结论:
- 溶液度和S/B是控制AAS体积变化和热膨胀的关键参数.
- 与OPC相比,AAS对体积变化和热膨胀的潜力更大.
- 性溶液的高CTE显著影响了AAS的整体CTE.
- 需要进一步的研究,以充分阐明在AAS中控制自身菌株的机制.
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