以水泥为活化剂的多组分工业固体废弃物低碳胶凝材料设计方法研究

IF 6.5 2区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Ruiqi Wang , Guodong Li , Changyan Li , Yupeng Huo , Teng Wang , Peng Hou , Zuo Gong
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引用次数: 0

摘要

多组分固体废弃物低碳胶凝材料的微观结构与力学性能之间的关系已受到广泛关注。然而,工业固废是一个复杂的多组分体系,可变因素较多,给胶凝材料的配方设计带来一定难度。本文率先应用机器学习(ML)模型、算法和误差率分析了粉煤灰基浆料的抗压和抗折强度。确定系数 (R2)、均方误差 (MSE)、均方根误差 (RMSE)、平均绝对误差 (MAE) 和 a20 指数用于评估稳健性。采用 X 射线衍射(XRD)、扫描电子显微镜(SEM)和布鲁纳-埃美特-泰勒(BET)分析胶凝材料的演变。ML 模型的评估结果表明,梯度提升回归(GBR)模型具有最佳的确定参数和陡峭的正态分布拟合曲线,a20 指数为 0.861。GBR 模型的稳健性最好。通过皮尔逊系数确定了粉煤灰基胶凝材料的关键因素,有利于确定多组分固废低碳胶凝材料的配方。此外,实验还表明,多组分固体废弃物低碳胶凝材料的最佳配比分别为 10%石膏、10%偏高岭土、45%粉煤灰、15%矿渣和 20%水泥。值得注意的是,这种多组分固废低碳胶凝材料的抗压强度达到 35 MPa,优于 P-O 32.5 水泥的力学性能。相位、扫描电镜图像和孔隙结构分布结果表明,多组分固废材料的协同作用有效填充了材料空隙,同时在后期(14-28 d)通过胶凝反应促进了多种胶凝材料的形成。这项工作将促进工业固体废弃物的资源化利用,为减碳做出贡献,并能加速混凝土的绿色革命。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Study on the design method of multi-component industrial solid waste low carbon cementitious material with cement as the activator

Study on the design method of multi-component industrial solid waste low carbon cementitious material with cement as the activator

The relationship between microstructure and mechanical properties of multi-component solid waste low-carbon cementitious materials has been widely pay attention to. However, industrial solid waste is a complex multi-component system with many variable factors, which makes it difficult to design the formulation of cementitious materials. This paper pioneered the application of machine learning (ML) models, algorithms and error rates to analyze the compressive and flexural strength of fly ash-based pastes. Coefficient of determination (R2), mean squared error (MSE), root mean square error (RMSE), mean absolute error (MAE) and a20-index were used to evaluate robustness. X-ray diffraction (XRD), scanning electron microscope (SEM) and Brunauer-Emmett-Taylor (BET) were carried out to analyze evolution of cementitious materials. The evaluation results of ML models exhibited that the Gradient boosting regression (GBR) model had the best determination parameters and a steep normal distribution fitting curve with an a20-index of 0.861. GBR model exhibited the best robustness. The key factors of fly ash-based cementitious materials were identified by Pearson's coefficient, which was benefit to determine the formulation of multi-component solid waste low-carbon cementitious materials. Furthermore, experiments also demonstrated that the optimum ratio of multi-component solid waste low carbon cementitious material was 10 % gypsum, 10 % metakaolin, 45 % fly ash, 15 % slag and 20 % cement, respectively. It was worth noting that the compressive strength of this kind of multi-component solid waste low-carbon cementitious materials reached 35 MPa, which was superior to the mechanical properties of P·O 32.5 cement. The results of phase, SEM images and pore structure distribution showed that the synergistic effect of the multi-component solid waste materials effectively filled the material voids and also facilitated the formation of a variety of gelatinous materials through gelling reactions in the late stage (14–28 d). This work will promote the resource utilization of industrial solid waste, contribute to carbon reduction, and can accelerate the green revolution of concrete.

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来源期刊
CiteScore
7.60
自引率
19.40%
发文量
842
审稿时长
63 days
期刊介绍: Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation). The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.
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