Effect of test conditions on the bending strength of a geopolymer-reinforced composite
Effect of test conditions on the bending strength of a geopolymer-reinforced composite
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DOI：
10.1007/s10853-009-3994-6
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发表时间：
2010-02-01
影响因子：
4.5
通讯作者：
Louda, P.
中科院分区：
文献类型：
--
作者：
Pernica, D.;Reis, P. N. B.;Louda, P.
本文介绍了加载速率和测试温度对玻璃纤维或碳纤维增强地聚合物力学性能的影响，特别是对刚度和极限抗拉强度的影响。采用CLUZ- CYECH的高硅地聚合物粉末和两种增强纤维（玻璃纤维型AR和碳纤维- HTS 5631）。当位移速率从0.02 ~ 2 mm/s变化，测试温度从室温升高到300℃时，碳纤维和玻璃纤维增强地聚合物的位移速率从0.002 ~ 2 mm/s增加，其极限抗弯强度分别提高约33%和31%。碳纤维和玻璃纤维的刚度也存在同样的依赖关系，加载率分别为39%和53%。当室温升高至300℃时，两种增强材料的极限强度和抗弯刚度均显著降低。然而，在高达150℃时，刚度和强度都出现了较大的下降。
This paper presents the results obtained for the effects of the loading rate and of the testing temperature on the mechanical properties, particularly on the stiffness and on the ultimate tensile strength, of a geopolymer reinforced with glass or carbon fibres. HIGH-SILICA geopolymer powder from CLUZ- CYECH and two reinforcement fibres (glass fibres-type AR and carbon fibre - HTS 5631) were used. The displacement rate is varied from 0.02 until to 2 mm/s and the testing temperature is increased from the room temperature until the temperature of 300 A degrees C. For the case of geopolymers reinforced with carbon fibres and glass fibres, the increase of the displacement rate from 0.002 to 2 mm/s led to an improvement on the ultimate flexure strength of about 33 and 31%, respectively. The same dependency was observed for the stiffness, with variations of loading rate of 39 and 53%, for carbon fibres and glass fibres, respectively. Increasing the room temperature until the temperature of 300 A degrees C decreases significantly both the ultimate strength and the flexure stiffness for both reinforcements. However, a major drop on both the stiffness and the strength occurred up to 150 A degrees C.