A novel development of ultra-high-performance concrete with calcium oxide-activated materials and fibers: engineering properties and sustainability evaluation

IF 1.8 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Magazine of Concrete Research Pub Date : 2024-02-24 DOI:10.1680/jmacr.23.00234

Hadi Bahmani, Davood Mostofinejad

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引用次数: 0

Abstract

This study developed a novel ultra-high-performance concrete using calcium oxide-activated materials (UHPC-CAM) and modified synthetic macro and glass fibers. The mechanical and durability properties of the UHPC-CAM samples with different fiber types were tested and compared. The microstructure of the samples was examined by scanning electron microscopy (SEM). The environmental impacts of the mix designs were assessed by the IMPACT 2002+ method, a life cycle assessment (LCA) tool. The results showed that the UHPC-CAM had a high compressive strength of over 110 MPa and improved ductility when glass and synthetic macro fibers were used. The samples also had low water absorption and high electrical resistance, indicating low corrosion risk. The SEM analyses showed that the synthetic macro fibers created a denser geopolymer matrix than the glass fibers. The UHPC-CAM had lower environmental impacts than conventional UHPC in terms of human health, ecosystem quality, carbon footprint, and resources. Synthetic macro fibers were the most eco-friendly fibers for UHPC-CAM production.

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使用氧化钙活性材料和纤维的超高性能混凝土新进展：工程特性和可持续性评估

本研究利用氧化钙活性材料（UHPC-CAM）和改性合成大纤维及玻璃纤维开发了一种新型超高性能混凝土。对不同纤维类型的 UHPC-CAM 样品的力学性能和耐久性能进行了测试和比较。样品的微观结构由扫描电子显微镜（SEM）进行检测。采用生命周期评估（LCA）工具 IMPACT 2002+ 方法评估了混合设计对环境的影响。结果表明，UHPC-CAM 的抗压强度高达 110 兆帕以上，使用玻璃纤维和合成大纤维后，延展性得到改善。样品还具有低吸水性和高电阻，表明腐蚀风险低。扫描电镜分析表明，与玻璃纤维相比，合成大纤维形成的土工聚合物基质更致密。就人类健康、生态系统质量、碳足迹和资源而言，UHPC-CAM 对环境的影响低于传统的 UHPC。合成大纤维是生产 UHPC-CAM 的最环保纤维。

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来源期刊

Magazine of Concrete Research 工程技术-材料科学：综合

CiteScore

4.60

自引率

11.10%

发文量

102

审稿时长

5 months

期刊介绍： For concrete and other cementitious derivatives to be developed further, we need to understand the use of alternative hydraulically active materials used in combination with plain Portland Cement, sustainability and durability issues. Both fundamental and best practice issues need to be addressed. Magazine of Concrete Research covers every aspect of concrete manufacture and behaviour from performance and evaluation of constituent materials to mix design, testing, durability, structural analysis and composite construction.