Investigating the Influence of SCMs on Mechanical Performance through Experimental Feret's Coefficients in Low-carbon Concrete

IF 1.6 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY
Ana Antunes, Eliana Soldado, Hugo Costa, Ricardo do Carmo, Eduardo Júlio
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引用次数: 0

Abstract

The focus on sustainable construction materials has prompted research into alternatives to reduce the carbon dioxide emissions associated with the production of Portland cement. Several studies have attempted to minimise the use of Portland cement in structural concrete mixtures. However, traditional formulations and prediction models are not applicable to low-carbon concrete. Therefore, this study aimed to evaluate low carbon concrete mortar matrices, focusing on cement replacement by supplementary cementitious materials (SCMs), such as fly ash, natural pozzolans and electric arc furnace slag, increasing the compactness of the mixtures, and limiting the water-binder ratio. Different binder powder contents were studied (350 and 400 kg/m3) in two types of concrete for prefabrication: dry consistency and plastic consistency. The results showed that dry consistency mixtures with a higher fly ash content allow higher compactness. Higher compactness promotes an overall increase in Young's modulus, up to 16%, for all eco-mixtures. The analysis enabled the estimation of the Feret coefficients for each combination of cement with SCMs and their correlation with a power function, dependent on the water-cement ratio. This allows the future estimation of the strength for binder pastes of mixtures incorporating different percentages of these additions.

通过低碳混凝土中的试验费雷系数研究单体材料对力学性能的影响
对可持续建筑材料的关注促使人们研究替代品,以减少与波特兰水泥生产相关的二氧化碳排放。一些研究试图尽量减少结构混凝土混合物中硅酸盐水泥的使用。然而,传统的配方和预测模型并不适用于低碳混凝土。因此,本研究旨在评估低碳混凝土砂浆基质,重点是用粉煤灰、天然毛细管和电弧炉矿渣等辅助胶凝材料(SCMs)替代水泥,提高混合物的密实度,并限制水-粘结剂比率。研究了两种预制混凝土中不同的粘合剂粉末含量(350 和 400 千克/立方米):干稠度和塑性稠度。结果表明,粉煤灰含量较高的干稠混合物可获得较高的密实度。密实度越高,所有生态混合物的杨氏模量都会全面提高,最高可达 16%。通过分析,可以估算出水泥与单体材料的每种组合的费雷系数,以及它们与幂函数的相关性(取决于水灰比)。这样,今后就可以对含有不同比例这些添加物的混合物粘结浆的强度进行估算。
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来源期刊
Journal of Advanced Concrete Technology
Journal of Advanced Concrete Technology 工程技术-材料科学:综合
CiteScore
3.70
自引率
10.00%
发文量
45
审稿时长
3.5 months
期刊介绍: JACT is fast. Only 5 to 7 months from submission to publishing thanks to electronic file exchange between you, the reviewers and the editors. JACT is high quality. Peer-reviewed by internationally renowned experts who return review comments to ensure the highest possible quality. JACT is transparent. The status of your manuscript from submission to publishing can be viewed on our website, greatly reducing the frustration of being kept in the dark, possibly for over a year in the case of some journals. JACT is cost-effective. Submission and subscription are free of charge . Full-text PDF files are available for the authors to open at their web sites. Scope: *Materials: -Material properties -Fresh concrete -Hardened concrete -High performance concrete -Development of new materials -Fiber reinforcement *Maintenance and Rehabilitation: -Durability and repair -Strengthening/Rehabilitation -LCC for concrete structures -Environmant conscious materials *Structures: -Design and construction of RC and PC Structures -Seismic design -Safety against environmental disasters -Failure mechanism and non-linear analysis/modeling -Composite and mixed structures *Other: -Monitoring -Aesthetics of concrete structures -Other concrete related topics
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