用活性化飞灰和蛋粉末修改油井水泥的性能和环境效益研究
Shaojun Zheng1, Guoliang Zhu1, Mingsheng Chen1
1Unconventional Cementing and Special Reinforcement Laboratory, China University of Geosciences, Wuhan 430074, China; Faculty of Engineering, China University of Geosciences, Wuhan 430074, China.
Environmental research
|January 20, 2026
概括
活性飞灰和蛋粉混合物为油井凝固提供了一个可持续的替代方案,显著减少碳排放,同时提高机械性能和耐用性.
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.
- 环境科学 环境科学
背景情况:
- 传统的油井水泥 (GOWC) 生产由于高能耗和碳排放而对环境产生重大影响.
- 开发低碳替代油井水泥的替代品对于环境可持续性至关重要.
- 飞灰 (FA) 和蛋粉 (ESP) 是潜在的补充性水泥材料.
研究的目的:
- 调查使用活性飞灰 (FA) 和蛋粉 (ESP) 作为G级油井水泥 (GOWC) 的部分替代品.
- 评估这些可持续的水泥复合材料的气质,机械,微观结构和碳排放特性.
- 确定最佳的混合物,以提高性能和减少石油井凝固应用中的环境足迹.
主要方法:
- 制备三个混合物:FA30 (30% FA),ESP30 (30% ESP) 和FA15ESP15 (15% FA + 15% ESP) 作为GOWC的替代品.
- 在7天内在25-80°C的温度下对水泥泥进行水热固化.
- 使用rheological测试,压力强度测量,孔隙分析,热重力测量差异热分析 (TG-DTG),X射线衍射 (XRD),SEM-EDS和计算机断层扫描 (CT) 的表征.
主要成果:
- 所有泥都表现出剪切稀释行为,FA15ESP15混合物表现出平衡的质学和有利的抽能力.
- 在7天后,FA15ESP15混合物获得了最高的压力强度 (34.52MPa在80°C) 和最低的多孔度 (18.96%).
- 微结构分析证实了增强的C-A-S-H形成和水合反应,导致更密集的矩阵.
- 与传统的GOWC相比,碳排放分析显示碳排放量大幅减少46.37公斤CO2/MPa.
结论:
- 与单个替代品相比,FA-ESP混合物,特别是FA15ESP15,表现出优越的机械性能和较低的孔隙性.
- 这些混合物为油井凝固提供了一个有希望的可持续替代品,显著降低了碳足迹.
- FA和ESP的协同效应有助于提高水泥复合材料的性能和环境效益.
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