Experimental Study on Properties of Graphene and Hollow Glass Powder-Added Ultra-High Strength Concrete

IF 3.6 3区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Young-Jun Park, Hong-Sung Lee, Tae-Seok Seo
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Abstract

A new ultra-high strength concrete, in which oxidized graphene nanoplatelet (GO) and hollow glass powder (HGP) are added, has been developed by authors. This paper presents the material properties of the concrete such as workability, compressive and tensile strengths, internal micro structure (SEM and MIP) as well as air-tightness which was tested using an equipment developed in this study. Test results show that workability and tensile strength significantly increase by a small addition of HGP, and that cGO (GO product of company c) and HGP are well dispersed without agglomeration effect, resulting in more than 20% of reduction in porosity. It is also observed that air-tightness increases by 40% compared with conventional ultra-high strength concrete due to reduction in porosity; thus, new ultra-high strength concrete is anticipated to be effectively used for structures that requires air-tightness such as hyperloop tube. Consequently, it was observed that the workability and mechanical properties of UHSC were increased when cGO and HGP were used instead of silica fume (SF), and authors believe that utilization of new material would contribute to the change in manufacturing method and increase in mechanical properties of concrete.

Abstract Image

添加石墨烯和中空玻璃粉的超高强度混凝土性能实验研究
作者开发了一种新型超高强度混凝土,其中添加了氧化石墨烯纳米板(GO)和空心玻璃粉(HGP)。本文介绍了该混凝土的材料特性,如工作性、抗压和抗拉强度、内部微观结构(扫描电镜和 MIP)以及气密性,并使用本研究开发的设备对其进行了测试。测试结果表明,少量添加 HGP 就能显著提高工作性和抗拉强度,cGO(c 公司的 GO 产品)和 HGP 分散良好,没有结块效应,从而使孔隙率降低 20%以上。同时还观察到,由于孔隙率降低,气密性比传统超高强度混凝土提高了 40%;因此,新型超高强度混凝土有望有效用于要求气密性的结构,如超级高铁管道。因此,作者认为使用新材料将有助于改变制造方法和提高混凝土的机械性能。
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来源期刊
International Journal of Concrete Structures and Materials
International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
6.30
自引率
5.90%
发文量
61
审稿时长
13 weeks
期刊介绍: The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.
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