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首页> 外文期刊>Petroleum exploration and development >Mechanical properties of oil well cement stone reinforced with hybrid fiber of calcium carbonate whisker and carbon fiber
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Mechanical properties of oil well cement stone reinforced with hybrid fiber of calcium carbonate whisker and carbon fiber

机译：碳酸钙晶须与碳纤维混杂纤维增强油井水泥石的力学性能。

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To decrease the brittleness of oil well cement stone, the effects of carbon fiber, calcium carbonate whisker and hybrid fiber of them on mechanical prosperities of the cement stone were studied by experiments. The microstructures and micromechanical behaviors of the cement stone were investigated using scanning electron microscopy. The strengthening and toughening mechanisms of hybrid fiber were discussed. The experimental results show that: the compressive, flexural, split tensile strengths of the cement stone can be improved effectively with each of carbon fiber, calcium carbonate whisker and hybrid fiber; compared with adding a single fiber, the hybrid fiber can strengthen the cement stone better; the mechanical deformation capacity of the cement stone added the hybrid fiber is significantly improved, and the cement stone shows obvious toughness. Observing the microstructures and micromechanical behaviors of the cement stone and analyzing the reinforcement mechanism of hybrid fiber reveal that, the calcium carbonate whisker and carbon fiber have different sizes, morphologies and performances, which can work in different structure levels and loading stages, controlling generation and development of microcracks and fractures and improving the strength and toughness of the cement stone.
机译：为了降低油井水泥石的脆性，通过实验研究了碳纤维，碳酸钙晶须和杂化纤维对水泥石力学性能的影响。用扫描电子显微镜研究了水泥石的微观结构和微观力学行为。讨论了杂化纤维的增强和增韧机理。实验结果表明：碳纤维，碳酸钙晶须和杂化纤维均可有效提高水泥石的抗压，挠曲，劈裂抗拉强度。与添加单纤维相比，杂化纤维可以更好地加固水泥石。添加杂化纤维的水泥石的机械变形能力明显提高，水泥石具有明显的韧性。观察水泥石的微观结构和微机械性能，并分析混杂纤维的增强机理，发现碳酸钙晶须和碳纤维具有不同的尺寸，形态和性能，可以在不同的结构水平和载荷阶段发挥作用，控制生成和形成。产生微裂纹和裂缝，提高水泥石的强度和韧性。

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