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砂的物理和机械性能与大米皮灰和甘包灰作为部分水泥替代品

Jyoti Rashmi Nayak¹, Małgorzata Gołaszewska², Jerzy Bochen²

¹Department of Civil Engineering, GITAM (Deemed to be University), Hyderabad 502329, India.

Materials (Basel, Switzerland)

|October 29, 2025

概括

天然补充水泥材料,如大米灰 (RHA) 和甘包灰 (SCBA),提供可持续的替代品. 用高达10%的RHA或15%的SCBA取代普通波特兰水泥 (OPC) 会保持砂的强度并减少收缩.

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:

传统补充水泥材料 (SCM) 的稀缺性越来越大.
需要可持续的替代品与pozzolanic属性.
米灰 (RHA) 和甘包灰 (SCBA) 作为可行的天然SCM.

研究的目的:

为了比较评估RHA和SCBA对砂性能的影响.
为了确定普通波特兰水泥 (OPC) 与RHA和SCBA的最佳替代水平.
评估使用这些天然SCM的砂的微结构特征.

主要方法:

在0%,5%,10%和15%的水平上,部分用RHA和SCBA取代OPC.
调查砂的特性:空气含量,一致性,压力强度,屈曲强度和收缩.
使用孔径测量,MIP和SEM进行微结构分析.

主要成果:

高达10%的RHA或15%的SCBA替代品保持了机械性能.
使用15%SCBA的砂在28天后显示了最小的压力强度变化 (<11%下降).
10%的RHA替代剂导致压力强度没有显著变化.
5%的RHA减少了35%的收缩;5%的SCBA减少了30%的收缩.

结论:

RHA和SCBA是用于体砂的有效天然SCM.
确定了最佳的替代水平,以平衡性能和可持续性.
这些天然的SCM有助于增强砂的性能和减少收缩.

关键词:

波特兰水泥是什么波特兰水泥是什么包装灰灰的灰是什么意思迫击炮迫击炮迫击炮部分更换部分更换物理和机械性能物理和机械性能.大米皮灰灰

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