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Advances in Materials Science and Engineering
Volume 2017, Article ID 2939057, 13 pages
https://doi.org/10.1155/2017/2939057
Research Article

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

1College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, China
2Department of Materials Engineering, Sichuan College of Architectural Technology, Deyang, China
3College of Administrative Science, Chengdu University of Technology, Chengdu, China

Correspondence should be addressed to Shun Fu; nc.ude.tudc@sf

Received 18 June 2017; Revised 11 August 2017; Accepted 6 September 2017; Published 23 November 2017

Academic Editor: Rishi Gupta

Copyright © 2017 Yuanyi Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

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 physical model 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 bonded with much more fastness to the cement surface. The development of this script provides new ways to analyze the toughening mechanism of CaCO3 whisker and establishes a correlation between basic material structure and the physical properties.