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通过优化物理化学过程获得的棕油核灰的Pozzolanic潜力的表征

Ramon Torres Ortega¹, María Luna Velasco², Jair Arrieta Baldovino¹

¹Civil Engineering Program, University of Cartagena, Calle 30 # 48-152, Cartagena de Indias 130001, Colombia.

Materials (Basel, Switzerland)

|March 27, 2025

概括

棕油核贝灰 (POFA) 显示了用于混凝土增强的pozzolanic潜力. 在600°C的最佳化平衡了反应性和杂质去除,符合ASTM对天然pozzolans的标准.

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.
可持续建筑可持续建筑

背景情况:

棕油核贝灰 (POFA) 是一个农业工业副产品,具有显著的pozzolanic特性.
POFA可以提高混凝土的机械强度和耐久性.
它的利用与可持续建筑实践保持一致,通过利用废物材料.

研究的目的:

为了描述哥伦比亚POFA的pozzolanic潜力.
为了确定POFA激活的最佳化温度.
评估POFA是否符合用于波特兰水泥混凝土的标准.

主要方法:

POFA样品经过干燥,切割,研磨,粉碎和烧焦 (500°C~1000°C).
描述涉及扫描电子显微镜与能量分散式X射线光谱 (SEM-EDS/EDX),X射线光 (XRF) 和燃烧损失 (LOI) 测试.
为了优化LOI值,研究了一种两阶段的化工艺.

主要成果:

(SiO₂) 含量随着化温度的增加而增加,在1000°C时达到76.8%的峰值.
在600°C的化是最佳的,在不形成有害的晶体二氧化的情况下去除杂质.
500°C样品的第二次化到600°C的结果是LOI为3.33%,符合ASTM C311标准.

结论:

哥伦比亚的POFA在具体应用中表现出有前途的pozzolanic特性.
优化烧温度对于最大限度地提高POFA的反应能力和性能至关重要.
当POFA经过适当处理时,可以作为一种可行的补充水泥材料,为可持续的混凝土技术做出贡献.

关键词:

一个X射线的光效应.在水泥,水泥,水泥.化学性质化学性质混凝土混凝土混凝土是什么棕油核的贝灰,油棕油核的贝灰.最佳的温度是最佳的温度.波佐兰 (Pozzolan) 是一个波佐兰人.可持续性可持续性可持续性

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