Abrasion Resistance of Ultra-High-Performance Concrete for Railway Sleepers
| Autor: | Nader Ghafoori, Ariful Hasnat |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Cement
Materials science Aggregate (composite) Silica fume Abrasion (mechanical) Geography Planning and Development 0211 other engineering and technologies 020101 civil engineering Transportation 02 engineering and technology 0201 civil engineering Urban Studies Compressive strength Fly ash 021105 building & construction Automotive Engineering Cementitious Fiber Electrical and Electronic Engineering Composite material Civil and Structural Engineering |
| Zdroj: | Urban Rail Transit. 7:101-116 |
| ISSN: | 2199-6679 2199-6687 |
| DOI: | 10.1007/s40864-021-00145-8 |
| Popis: | This study aimed to determine the abrasion resistance of ultra-high-performance concretes (UHPCs) for railway sleepers. Test samples were made with different cementitious material combinations and varying steel fiber contents and shapes, using conventional fine aggregate. A total of 25 UHPCs and two high-strength concretes (HSCs) were selected to evaluate their depth of wear and bulk properties. The results of the coefficient of variation (CV), relative gain in abrasion, and abrasion index of the studied UHPCs were also obtained and discussed. Furthermore, a comparison was made on the resistance to wear of the selected UHPCs with those of the HSCs typically used for prestressed concrete sleepers. The outcomes of this study revealed that UHPCs displayed excellent resistance against abrasion, well above that of HSCs. Amongst the utilized cementitious material combinations, UHPCs made with silica fume as a partial replacement of cement performed best against abrasion, whereas mixtures containing fly ash showed the highest depth of wear. The addition of steel fibers had a more positive influence on the abrasion resistance than it did on compressive strength of the studied UHPCs. |
| Databáze: | OpenAIRE |
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