硅灰和玻璃粉对增强基于 GGBFS 的超高性能土工聚合物纤维混凝土抗冲击性的影响:实验和统计分析

IF 5.1 2区 工程技术 Q1 Engineering Defence Technology Pub Date : 2024-05-30 DOI:10.1016/j.dt.2024.05.015
G. Murali, Anoop Kallamalayil Nassar, Madhumitha Swaminathan, Parthiban Kathirvel, Leong Sing Wong
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引用次数: 0

摘要

固体废物回收利用是一项经济合理的战略,有利于保护环境、保护自然资源和减少对原材料消耗的依赖。土工聚合物技术可实现多种材料的再利用和再循环,具有显著优势。本研究评估了硅灰和玻璃粉如何增强超高性能土工聚合物混凝土(UHPGC)的抗冲击性。通过用不同比例的硅灰和玻璃粉(10% 至 40%)替代磨细高炉矿渣,共配制出 18 种不同的混合物。同样,针对 UHPGC 固有的脆性,上述每种混合物都添加了 1.5% 的钢纤维。混合物通过氢氧化钠和硅酸钠溶液进行活化,生成土工聚合物粘结剂。对试样进行落重冲击试验,以评估各种参数,包括流动性、新鲜和硬化状态下的密度、抗压强度、表明开裂和失效发生的冲击次数、延展性指数和失效模式分析。此外,还利用威布尔分布分析了冲击试验结果的变化,并提供了与存活概率相对应的结论。此外,还通过扫描电子显微镜仔细观察了 UHPGC 的微观结构。研究结果表明,与使用硅灰的试样相比,使用玻璃粉的试样显示出较低的开裂冲击数值,降低幅度为 18.63% 至 34.31%。同样,不同玻璃粉含量的破坏冲击数值也从 8.26% 降至 28.46%。含有 10%硅灰和纤维的 UHPGC 的抗压强度和冲击强度最大。
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Effect of silica fume and glass powder for enhanced impact resistance in GGBFS-based ultra high-performance geopolymer fibrous concrete: An experimental and statistical analysis
Solid waste recycling is an economically sound strategy for preserving the environment, safeguarding natural resources, and diminishing the reliance on raw material consumption. Geopolymer technology offers a significant advantage by enabling the reuse and recycling of diverse materials. This research assesses how including silica fume and glass powder enhances the impact resistance of ultra-high-performance geopolymer concrete (UHPGC). In total, 18 distinct mixtures were formulated by substituting ground granulated blast furnace slag with varying proportions of silica fume and glass powder, ranging from 10% to 40%. Similarly, for each of the mixtures above, steel fibre was added at a dosage of 1.5% to address the inherent brittleness of UHPGC. The mixtures were activated by combining sodium hydroxide and sodium silicate solution to generate geopolymer binders. The specimens were subjected to drop-weight impact testing, wherein an examination was carried out to evaluate various parameters, including flowability, density at fresh and hardened state, compressive strength, impact numbers indicative of cracking and failure occurrences, ductility index, and analysis of failure modes. Additionally, the variations in the impact test outcomes were analyzed using the Weibull distribution, and the findings corresponding to survival probability were offered. Furthermore, the microstructure of UHPGC was scrutinized through scanning electron microscopy. Findings reveal that the specimens incorporating glass powder exhibited lower cracking impact number values than those utilizing silica fume, with reductions ranging from 18.63% to 34.31%. Similarly, failure impact number values decreased from 8.26% to 28.46% across glass powder contents. The maximum compressive and impact strength was recorded in UHPGC, comprising 10% silica fume with fibres.
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来源期刊
Defence Technology
Defence Technology Engineering-Computational Mechanics
CiteScore
7.50
自引率
7.80%
发文量
1248
审稿时长
22 weeks
期刊介绍: Defence Technology, sponsored by China Ordnance Society, is published quarterly and aims to become one of the well-known comprehensive journals in the world, which reports on the breakthroughs in defence technology by building up an international academic exchange platform for the defence technology related research. It publishes original research papers having direct bearing on defence, with a balanced coverage on analytical, experimental, numerical simulation and applied investigations. It covers various disciplines of science, technology and engineering.
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