提高混凝土的可持续发展能力 研究在以 GGBS 为基础的混凝土中使用 POND ASH 部分替代细骨料的可行性

Shajeeh Fasil T, L. Periyasamy, M. Seethapathi, K. M. Das
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摘要

摘要:印度每年使用超过 1 亿立方米的混凝土,使其成为最常见的建筑材料。众所周知,使用抗压强度建造的传统混凝土无法满足许多功能要求,包括防渗性和抗冻性。混凝土的主要成分波特兰水泥的生产会排放大量的二氧化碳,对我们的生态系统造成灾难性的影响。生产一吨水泥材料,就会排放一吨二氧化碳和其他温室气体。必须使用其他胶凝材料来有效替代水泥,同时又不影响混凝土所需的质量。对样品进行了 7 天、28 天和 56 天的耐久性能测试,如透水性、氯离子渗透性和机械性能。混合料 M7 的抗压强度表现突出,14 天时达到 30.72 牛顿/平方毫米,28 天时显著提高到 43.18 牛顿/平方毫米,56 天时达到 48.91 牛顿/平方毫米,是一种非常耐用的高性能混凝土混合料。在比较传统混合料和研究混合料(M1 至 M8)的研究中,M7 混合料的 28 天劈裂拉伸强度为 4.28 牛顿/平方毫米,抗折强度为 9.657 牛顿/平方毫米。煤电站产生的大量粉煤灰通过巨大的池塘和堤坝回收。研究表明,用 30% 的 GGBS 和 20% 的池塘灰替代水泥的效果最好。根据研究,有些工业废料可以用 GGBS 和塘灰分别替代混凝土中高达 40% 和 20% 的水泥和细骨料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhancing Sustainable Concrete Investigating the Feasibility of POND ASH as a Partial Replacement for Fine Aggregate in GGBS-Based
ABSTRACT: India uses more than 100 million cubic meters of concrete annually, making it the most common building material. It is common knowledge that traditional concrete constructed using compressive strength does not meet many functional requirements, including impermeability and frost resistance. By emitting a significant amount of CO2, the manufacture of Portland cement, a key component of concrete, has had disastrous effects on our ecosystem. When one tonne of cement materials is produced, one tonne of CO2 and other greenhouse gases are emitted. Additional cementitious materials must be used to efficiently substitute cement without compromising the required qualities of concrete. The samples were tested for durability properties like water and chloride permeability and mechanical properties for lengths of 7, 28, and 56 days. Mix M7 exhibits outstanding compressive strength progression, showcasing impressive results of 30.72 N/mm² at 14 days, followed by significant enhancement to 43.18 N/mm² at 28 days, and a robust 48.91 N/mm² at 56 days, making it a highly durable and high-performance concrete mix. In the study comparing the conventional mix and study mix (M1 to M8), the M7 mix exhibited a 28-day split tensile strength of 4.28 N/mm² and flexural strength of 9.657 N/mm². A significant amount of fly ash produced by the coal-based power station is recovered via huge ponds and dykes. It was revealed that 30% GGBS and 20% pond ash replacement of cement yielded the best results. According to research, there are industrial wastes that can replace up to 40% and 20% of the cement and fine aggregate in concrete by GGBS and Pond Ash, respectively.
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