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对CO2对NaOH-激活和Na2C2O4+Ca(OH) 2-激活地质聚合物的抗性进行比较分析
Shenglai Guo1, Rong Wang1, Ye Zhang2
1Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China.
ACS omega
|May 12, 2025
概括
氧酸盐和氧化提供了一个环保的地质聚合物激活剂,具有与氧化相比较的CO2抵抗力. 较长的固化时间显著提高了地质聚合物的强度和二氧化碳耐受性.
科学领域:
- 材料科学 材料科学 材料科学
- 地质化学 地质化学
- 可持续化学 可持续化学
背景情况:
- 传统的性激活剂如NaOH具有环境缺点.
- 为地质聚合物生产寻找环保活性剂.
- 来自Na2C2O4 + Ca(OH) 2的氧化副产品可能会改善CO2的耐受性.
研究的目的:
- 为了比较由Na2C2O4 + Ca(OH) 2激活的地质聚合物与NaOH的二氧化碳阻力.
- 为了研究暴露前固化时间对二氧化碳电阻的影响.
- 分析影响地质聚合物耐用性的微结构变化.
主要方法:
- 使用飞灰和渣渣前体的地质聚合物合成.
- 与Na2C2O4 + Ca(OH) 2和NaOH进行激活.
- 暴露在高温CO2条件下 (110°C,5MPa).
- 对度,强度,XRD,FTIR和DTG的分析.
主要成果:
- 两种激活器都显示出相似的CO2阻力,压力强度在21天后增加了7.14-22.58%.
- 将固化时间从1天延长到7天显著增强了CO2抵抗力 (28.9-34.2%更高的强度).
- 与C-A-S-H凝相比,N-A-S-H凝显示出更高的二氧化碳耐受性.
结论:
- Na2C2O4 + Ca(OH) 2 是一个可行的环保替代激活剂,用于地质聚合物.
- 暴露前固化时间是增强地质聚合物CO2抵抗力的关键因素.
- 了解凝结构 (N-A-S-H与C-A-S-H) 是改善地质聚合物耐用性的关键.
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