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Material and glass-fibre-reinforced polymer bond properties of geopolymer concrete

机译：地质聚合物混凝土的材料和玻璃纤维增​​强的聚合物粘结性能

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摘要

Geopolymers are recognised for their environmental benefits and excellent chloride and sulfate resistance. However, information on the material characteristics and bond behaviour of geopolymers based on fly ash (FA) and slag is still relatively scarce. This paper presents a comprehensive study on the integration of two modern construction materials - geopolymer concrete (GPC) based on FA and ground granulated blast-furnace slag and glass-fibre-reinforced polymer (GFRP) bars. The aim of the study was to assist concrete structural design by identifying the key preparation parameters such as hardening and bond behaviour. It was found that the hardening of the GPC was much faster than that of ordinary Portland cement (OPC) concrete at an early age and the stress-strain curves, elastic moduli and splitting tensile strengths of the GPC were accurately predicted by existing models developed for OPC concrete. The GFRP bars in the GPC outperformed those in the OPC concrete in terms of normalised bond strength. The GPC reinforced with both GFRP and steel rebars exhibited similar bond-slip curves to the OPC concrete. Overall, the behaviour of the GFRP-reinforced GPC was found to be analogous to that of the OPC concrete while providing adequate compressive, tensile and bond strength for the construction of foundations of low-rise buildings.
机译：地质聚合物因其对环境的好处以及出色的耐氯化物和硫酸盐能力而闻名。然而，关于基于粉煤灰（FA）和矿渣的地聚合物的材料特性和结合行为的信息仍然相对匮乏。本文对两种现代建筑材料-基于FA的地聚合物混凝土（GPC）和磨碎的高炉矿渣和玻璃纤维增​​强聚合物（GFRP）棒的集成进行了综合研究。该研究的目的是通过确定关键的制备参数（例如硬化和粘结性能）来协助混凝土结构设计。研究发现，GPC的硬化比普通波特兰水泥（OPC）的早期要快得多，并且通过开发的现有模型可以精确预测GPC的应力-应变曲线，弹性模量和劈裂抗张强度。 OPC混凝土。就归一化粘结强度而言，GPC中的GFRP筋优于OPC混凝土中的筋。用GFRP和钢筋加固的GPC与OPC混凝土的粘结滑移曲线相似。总体而言，发现GFRP增强的GPC的行为类似于OPC混凝土，同时为低层建筑的基础提供了足够的压缩，拉伸和粘结强度。

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  • 来源
    《Magazine of Concrete Research》 |2020年第10期|509-525|共17页
  • 作者

  • 作者单位

    Univ Western Australia Sch Civil Environm & Min Engn Crawley WA Australia;

    Univ Melbourne Dept Chem Engn Parkville Vic Australia;

    Univ Wollongong Sch Civil Min & Environm Engn Wollongong NSW Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bond; compressive strength; pull-out testing;

    机译：键;抗压强度;拔出测试;

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