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首页> 外文期刊>Journal of Composite Materials >Fiber-cement composite using rice stalk fiber and rice husk ash: Mechanical and physical properties
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Fiber-cement composite using rice stalk fiber and rice husk ash: Mechanical and physical properties

机译：使用稻秆纤维和稻壳灰的纤维水泥复合材料：机械和物理性能

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摘要

Rice stalk fiber and rice husk ash are agricultural by-products, which are available worldwide in large quantities. There is, however, no information about suitability of the rice stalk fiber and rice husk ash combination for the production of fiber-cement composites in the open literature. This paper presents a parametric experimental study, which investigates the potential use of rice stalk fiber (as reinforcement) and rice husk ash (as cement replacement) admixtures for producing a lightweight fiber-cement composite as a building material. Three levels of fibrous materials, namely 10, 25 and 40 wt% were mixed with 0, 10 and 20 wt% of rice husk ash. Effects of these variable parameters on the mechanical (modulus of rupture, modulus of elasticity and internal bond) and physical properties (water absorption and thickness swelling) of the samples were studied. The results showed the effect of high-level replacement of rice stalk fiber with rice husk ash does not exhibit a sudden brittle fracture even beyond the failure loads, indicating high energy absorption capacity of the composites. Based on the findings of this work, the water absorption and thickness swelling of the composites increased with the increasing rice stalk fiber content in the samples from 10 to 40 wt%. On the other hand, modulus of rupture and modulus of elasticity of the boards were enhanced with increase in the percentage of rice stalk fiber. Boards having 25 wt% rice stalk fiber exhibited the highest internal bond strength. However, addition of rice stalk fiber and rice husk ash reduced the internal bond strength. Moreover, boards made with rice stalk fiber had superior properties compared to boards made with a mixture of hardwood fibers.
机译：稻秆纤维和稻壳灰是农业副产品，在世界范围内有大量供应。然而，在公开文献中，没有关于稻秆纤维和稻壳灰的组合是否适合生产纤维水泥复合材料的信息。本文提供了一项参数化实验研究，该研究研究了稻秆纤维（作为增强材料）和稻壳灰（作为水泥替代品）混合物在生产轻质纤维水泥复合材料作为建筑材料中的潜在用途。将三种水平的纤维材料（即10、25和40 wt％）与0、10和20 wt％的稻壳灰混合。研究了这些可变参数对样品的力学性能（断裂模量，弹性模量和内部键）和物理性能（吸水率和厚度膨胀）的影响。结果表明，用稻壳灰高水平替代稻秆纤维的效果即使在破坏载荷以上也不会表现出突然的脆性断裂，表明该复合材料具有很高的能量吸收能力。根据这项工作的发现，随着样品中稻秆纤维含量的增加，复合材料的吸水率和厚度膨胀率从10％增至40％（重量）。另一方面，随着稻秆纤维百分比的增加，板的断裂模量和弹性模量增加。具有25重量％的稻秆纤维的板表现出最高的内部粘合强度。然而，添加稻秆纤维和稻壳灰降低了内部结合强度。此外，与用硬木纤维混合制成的板相比，用稻秆纤维制成的板具有更好的性能。

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