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عنوان فارسی مقاله:
بررسی مقاومت پوسته پوسته شدن با قدرت فوق العاده بالا بتن تحت گرمایش سریع و خنک سازی سریع
عنوان انگلیسی مقاله:
Investigation on spalling resistance of ultra-high-strength concrete under rapid heating and rapid cooling
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
With the expansion and densification of urban and rural construction, there are frequent building collapses due to the deterioration of building materials in fires. The fuel source of a fire affects the effect of the fire on surrounding concrete buildings. For example, the temperature of surrounding buildings rapidly rises above 1000 C in the event of a tunnel or oil industry fire, while the temperature of surrounding buildings rapidly decreases to ambient temperature following an explosion involving a flammable and explosive gas, liquid or solid. In the case of such combustion or explosions, surrounding concrete buildings must have good resistance against rapid heating and rapid cooling. However, concrete, and especially high-strength concrete, readily undergoes explosive spalling in a fire or at high temperature [1]. In addition, with the rapid development of large and high engineering constructions in recent years, ultra-high strength concrete is more widely applied in the construction industry. There is thus a need for research on the spalling resistance of ultra-high-strength concrete under conditions of rapid heating and rapid cooling. The explosive spalling phenomenon was put forward by Hertz [2] as early as 1984. There was serious spalling damage of 100-MPa concrete in the English–French Channel Tunnel in 1996 [3], which encouraged many countries and regions to carry out relevant research. Research on the high-temperature spalling mechanism of concrete [4,5] has considered the vapor pressure mechanism to be the primary cause. Kalifa [6] showed the feasibility of the vapor pressure mechanism by measuring the internal vapor pressure of concrete. On the basis of this mechanism, fusible organic fibers have been added to high-strength, high-performance concrete to improve the concrete’s resistance to explosive spalling in a fire or at high temperature [7,8]. Doherty [9,10] studied the effects of the fiber type and length on spalling damage. In addition, Li [11,12]
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کلمات کلیدی:
Investigation on spalling resistance of ultra-high-strength ... - CiteWeb citeweb.info/20160836970 {{cite web | title=Investigation on spalling resistance of ultra-high-strength concrete under rapid heating and rapid cooling | year=2016 ... An experimental investigation of the thermal spalling of polypropylene ... engine.scichina.com/doi/10.1007/s11434-015-0939-0 by J Yang - 2015 - Cited by 5 - Related articles Kodur VKR (2000) Spalling in high strength concrete exposed to fire: concerns, ... Lee SH (2012) Fire resistance of hybrid fibre-reinforced, ultra-high-strength ... Experimental Research on Fire Resistance of Reactive Powder ... https://www.hindawi.com/journals/amse/2012/860303/ by GF Peng - 2012 - Cited by 18 - Related articles Feb 22, 2012 - An experimental investigation was conducted on fire resistance of reactive powder ... RPC spalled considerably under high temperature. ... attracted great research attention for its ultra-high strength and high durability [1, 2]. Experimental investigation of ultra-high performance concrete slabs ... https://espace.curtin.edu.au/handle/20.500.11937/13361 by J Li - 2016 - Cited by 8 - Related articles Experimental investigation of ultra-high performance concrete slabs under contact ... of normal strength concrete (NRC) and five ultra-high performance concrete ... spacing and slab depth on the spall resistance of UHPC slabs is investigated. Spalling behavior and residual resistance of fibre reinforced Ultra ... materconstrucc.revistas.csic.es › Home › Vol 65, No 320 (2015) › Xiong by MX Xiong - 2015 - Cited by 3 - Related articles The compressive strength of the ultra-high performance concrete ranged from ... of fiber type, fiber dosage, heating rate and curing condition were investigated. Ultra High Performance Concrete (UHPC): Proceedings of the Second ... https://books.google.com/books?isbn=3899583760 Ekkehard Fehling, Michael Schmidt, S. Stürwald - 2008 - High strength concrete Proceedings of the Second International Symposium on Ultra High ... Experimental. investigation. of. impact. behaviour. of. high. strength. fiber ... ductility, tensile and flexural strength in order to enhance the construction resistance under static and dynamic loading and to reduce crack propagation and spalling phenomena.
