Mechanical Attributes of Uniaxial Compression for Calcium Carbonate Whisker Reinforced Oil Well Cement Pastes

作者：Yang, Yuanyi; Fu, Shun^*; Li, Xingkui

来源：Advances in Materials Science and Engineering, 2017, 2017: 2939057.

DOI：10.1155/2017/2939057

• HYBRID FIBER
• BOND

It is crucial for design and safety of the cementing sheath to develop better understanding of the CaCO3 whisker reinforced oil well cement pastes. The uniaxial compression curve, mechanical constitutive relation, and reinforcing mechanism of the CaCO3 whisker reinforced oil well cement pastes are studied in this script. The results indicate that the CaCO3 whisker under the 10% dosage could improve the tensile strength of the cement paste significantly. The peak stress, elasticity modulus, and the energy at different stages of the stress-strain curve of the CaCO3 whisker reinforced cement paste are reinforced with the increasing of CaCO3 whisker. Afterward, the constitutive model of stress-strain curve, the toughness index, and capability coefficients index of the CaCO3 whisker reinforced cement paste are established. A physicalmodel of the interface layer is also established and the micromechanical reinforcement is related to the double film layer between the CaCO3 whisker and cement matrix which could be bondedwithmuch more fastness to the cement surface. The development of this script provides newways to analyze the toughening mechanism of CaCO3 whisker and establishes a correlation between basic material structure and the physical properties.

• 出版日期2017
• 单位成都理工大学