高温下各种纤维增强砂浆的无损特性

IF 1.3 Q3 Earth and Planetary Sciences

Mining Science Pub Date : 2018-01-01 DOI:10.5277/MSC182513

M. Ezziane, Laurent Molez, I. Messaoudene

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引用次数: 2

摘要

研究温度对钢纤维、聚丙烯纤维和混杂纤维增强标准砂浆物理力学性能的影响。在5°C/min的温度梯度下加热至最高温度105°C、400°C、500°C和800°C，对样品进行无损检测(毛细管吸水率、相互连通孔隙率、透气性、超声速度)。结果表明，材料的性能变化与热暴露损伤之间存在良好的相关性。研究表明，当温度超过500℃时，纤维砂浆的物理力学性能明显恶化。混合纤维砂浆表现出良好的折衷:聚丙烯纤维保证了热稳定性，而钢纤维则保持了良好的力学性能。

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Non-destructive characterisation of mortars reinforced with various fibres exposed to high temperature

The objective of this study is to investigate the effect of temperature on the physical and mechanical properties of standard mortar reinforced with steel fibers, polypropylene fibers and hybrid fibers. Non-destructive tests (capillary water absorption, interconnected porosity, gas permeability, ultrasound celerity) were carried out on samples that had been heated, at a temperature ramp of 5 °C/min, to maximum temperature of: 105 °C, 400 °C, 500 °C et 800 °C. The results show a good correlation between the evolution of properties and the damage resulting from the imposed heat exposure treatment. The study shows that there is a significant deterioration of physico-mechanical properties of the fiber mortars above 500 °C. The hybrid fiber mortars show a good compromise: the polypropylene fibers guarantee a thermal stability whereas the steel fibers act to conserve good mechanical behavior.

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来源期刊

Mining Science MINING & MINERAL PROCESSING-

CiteScore

2.40

自引率

0.00%

发文量

审稿时长

24 weeks

期刊介绍： Mining Scince. Scientific Papers of the Department Geoengineering, Mining and Geology of the Wroclaw University of Technology. The journal publishes original papers on mining and geology, geo-engineering and the related issues. The journal is devoted to the following topics: fundamental research in mining, underground and open-cast mining technologies, blasting technology, design and construction of mines, geomechanics and geotechnical engineering, mine ventilation, fluid mechanics and its application in mining, mining machinery and condition monitoring, mineral processing, environmental protection and waste utilization. The journal also accepts papers concerns geoengineering which is a sciences covering mining construction, geotechnical engineering, GIS, and earth sciences.