探索利用活性火山灰作为在砂配方中的波特兰水泥的替代品:一个彻底的实验调查
Andrés Játiva1, Miren Etxeberria1
1Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya (UPC-Barcelona TECH), 08034 Barcelona, Spain.
Materials (Basel, Switzerland)
|March 13, 2024
概括
火山灰 (VA) 可以在砂中取代波特兰水泥 (PC),提供一个负担得起的,减少二氧化碳排放的建筑材料. 优化的激活方法,比如用石灰烧,使得即使有显著的VA替代,压力强度也很高.
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:
- 水泥行业面临着相当大的二氧化碳排放.
- 天然波佐兰为传统水泥组件提供了可持续的替代品.
- 火山灰 (VA) 是一个丰富的天然pozzolan,有可能替代水泥.
研究的目的:
- 评估使用火山灰 (VA) 在砂生产中部分替代波特兰水泥 (PC) 的可行性.
- 评估不同激活方法对VA反应性和砂性能的有效性.
- 确定具有高替换水平的VA型迫击炮的机械和物理性能.
主要方法:
- 进行了两个实验阶段,以测试VA激活和迫击炮性能.
- 第1阶段:评估化,活性和加,以替代35%的VA.
- 第二阶段:适用于50%和75%的最佳治疗,评估压力强度和物理性质在7日和28日.
主要成果:
- 化VA (CVA) 添加了20%的,在50%的VA替换下,达到超过45MPa的压力强度.
- 化学激活剂 (CaCl,NSi) 在35%的VA砂中增强了早期的强度.
- 使用75%VA替代剂的砂显示出足够的压力强度 (28天后33MPa).
结论:
- 火山灰,特别是用石灰烧焦的VA,是砂生产中波特兰水泥的可行和有效的部分替代品.
- 优化的激活方法显著提高了基于VA的迫击炮的性能.
- 基于VA的砂由于其经济和环境效益,显示出可持续建筑应用的巨大潜力.
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