硅灰和添加剂对高温下高性能混凝土性能的联合影响

IF 1.3 Q3 Earth and Planetary Sciences Mining Science Pub Date : 2017-09-08 DOI:10.5277/MSC172408
N. Tebbal, Z. Rahmouni, M. Maza
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引用次数: 8

摘要

本研究考察了掺加硅灰和高效增塑剂对高温下高性能混凝土力学性能的影响。在加热过程中没有施加任何载荷的情况下,混凝土在暴露于200°C、400°C、600°C和900°C四种最高温度后,按水泥重量(2%、2.5%)的比例,用5%硅灰和两种剂量的超级增塑剂配制而成。结果表明,与20℃时相比,28 d时的机械电阻随温度升高而升高。相反,在600°C和900°C之间观察到明显的下降。然而,材料成分对机械强度的影响似乎很大。
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Combined effect of silica fume and additive on the behavior of high performance concretes subjected to high temperatures
: This study examines the effect of the additions of silica fume and super plasticizer on the mechanical performance of high performance concretes at high temperatures. The tested concretes are formulated with 5% silica fume and two dosages of super plasticizers in the ratio of (2%, 2.5%) the weight of cement after having been exposed to four maximum temperatures, 200 °C, 400 °C, 600 °C and 900 °C without any imposed load during the heating. The results obtained show that the mechanical resistance at 28 day increases with the degree of temperature compared to that measured at 20 °C. On the contrary, a clear decrease is observed between 600 °C and 900 °C. However, material composition seems to have great influence on the mechanical strength.
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来源期刊
Mining Science
Mining Science MINING & MINERAL PROCESSING-
CiteScore
2.40
自引率
0.00%
发文量
0
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.
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