基于磷石膏/GGBS 的土工聚合物混凝土的强度和微观结构特性

IF 1.7 4区 工程技术 Q3 ENGINEERING, CIVIL
Bheem Pratap
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引用次数: 0

摘要

土工聚合物混凝土是传统波特兰水泥混凝土的生态友好型替代品,而传统波特兰水泥混凝土由于在生产过程中排放大量二氧化碳而以碳足迹大而臭名昭著。磷石膏和研磨粒化高炉矿渣是工业废料,可与微硅一起用作水泥的替代品。磷石膏和磨碎的粒化高炉矿渣可以用碱溶液制成土工聚合物混凝土。这项工作研究了用磨细粒状高炉矿渣和微硅替代磷石膏的问题。研究通过力学性能、快速氯化物渗透试验、吸水率和孔隙率对强度和耐久性进行了测试。在用 20% 微硅替代磷石膏的情况下,达到的最大强度为 60.88 兆帕,而在用 20% 微硅替代磷石膏的情况下,快速氯化物渗透试验、吸水率和孔隙率都达到了最小值。此外,扫描电子显微镜图像显示,土工聚合物混凝土中凝胶的形成有助于加固样品。此外,还对极端梯度提升进行了统计分析。R² 值为 0.9999,这表明极梯度提升法在抗压强度的训练案例中表现准确。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Strength and Microstructural Properties of Phosphogypsum/GGBS-Based Geopolymer Concrete

Strength and Microstructural Properties of Phosphogypsum/GGBS-Based Geopolymer Concrete

Geopolymer concrete serves as an eco-friendly substitute for traditional Portland cement-based concrete, notorious for its high carbon footprint due to substantial carbon dioxide emissions during production. Phosphogypsum and ground granulated blast slag are industrial wastes that can be used as an alternative to cement, along with micro silica. Phosphogypsum and ground granulated blast slag can be developed into geopolymer concrete with alkali solutions. This work investigates the replacement of phosphogypsum with ground granulated blast slag and micro silica. For the purpose of the study, strength and durability were tested through mechanical properties, rapid chloride penetration test, water absorption and porosity. The maximum strength achieved was 60.88 MPa in the case of replacing 20% micro silica for phosphogypsum, while this result corresponded to minimal values for rapid chloride penetration test, water absorption, and porosity when phosphogypsum was replaced with 20% micro silica. Moreover, scanning electron microscope images illustrated the gel formation in the geopolymer concrete that contributed to strengthening the samples. Additionally, extreme gradient boosting was also analyzed for statistical means. The R² value of 0.9999 signifies that the extreme gradient boosting accounts for accurate in training cases for compressive strength.

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来源期刊
CiteScore
3.30
自引率
11.80%
发文量
203
期刊介绍: The aim of the Iranian Journal of Science and Technology is to foster the growth of scientific research among Iranian engineers and scientists and to provide a medium by means of which the fruits of these researches may be brought to the attention of the world’s civil Engineering communities. This transaction focuses on all aspects of Civil Engineering and will accept the original research contributions (previously unpublished) from all areas of established engineering disciplines. The papers may be theoretical, experimental or both. The journal publishes original papers within the broad field of civil engineering which include, but are not limited to, the following: -Structural engineering- Earthquake engineering- Concrete engineering- Construction management- Steel structures- Engineering mechanics- Water resources engineering- Hydraulic engineering- Hydraulic structures- Environmental engineering- Soil mechanics- Foundation engineering- Geotechnical engineering- Transportation engineering- Surveying and geomatics.
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