设计一种有效利用粉煤灰作为混凝土混合物中波特兰水泥的部分替代材料的方法

Everardo Donato Sánchez Topete, M. R. Belmonte, José Gabriel Ríos Moreno, Abraham Lopez Miguel
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摘要

二氧化碳对环境的最大贡献来自水泥生产,占全球排放量的5%至8%。另一方面,由于热电厂的室外贮存,粉煤灰构成了生态问题的残渣。考虑到需要减少碳足迹,粉煤灰的数量和可用性在m 联邦电力公司(CFE),它被认为是部分替代波特兰水泥的替代材料,促进其使用,并有助于减少波特兰水泥(PC)的消费。粉煤灰提高了混凝土的耐久性,机械阻力是一个值得质疑的性能,因为它是一种无定形材料,它反应缓慢,在早期(28天)不能达到高阻力。本研究旨在开发一种有效的方法,通过部分替代粉煤灰来提高混凝土的耐久性,该方法将从文章中获得,并提出了优化最佳设计的结果。虽然结果并没有显示出粉煤灰的全部性能和效益,但使用粉煤灰作为混凝土替代材料应使用低w/c比,如果在自然状态下使用,粉煤灰可替代10%,如果进行处理,只要设计得当,其可替代50%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Design of a methodology for the efficient use of fly ash as a partial substitute material for portland cement in concrete mixtures
The greatest contribution of CO2 to the environment is attributed to cement production, responsible for 5 to 8% of global emissions. On the other hand, fly ash (FA) is constituted in an ecologically problematic residue due to its outdoor storage in thermoelectric plants. Considering the need to reduce the carbon footprint, quantity and availability of fly ash in México, Comisión Federal de Electricidad (CFE), it is considered an alternative material for the partial replacement of portland cement, boosting its use and contributing to the decrease in consumption of portland cement (PC). Fly ash improves durability properties in concretes, mechanical resistance is a questioned property, since it is an amorphous material, it reacts slowly and does not achieve high resistances at an early age (28 days). This research aims to develop an efficient methodology to improve the durability properties of the concrete with partial replacement of fly ash which will be obtained from articles with results presented looking to optimize the best design. While the results do not show all the properties and benefits of fly ash to use a fly ash as a concrete substitute material should use a low w/c ratio, the fly ash, if used in the natural state, can be used as up to 10% replacement and if it carries a treatment, it can be used up to 50%, as long as the designs are properly performed.
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