Rationalizing the impact of aging on fiber–matrix interface and stability of cement-based composites submitted to carbonation at early ages

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• 作者：G. H. D. Tonoli ; V. D. Pizzol ; G. Urrea ; S. F. Santos…
• 刊名：Journal of Materials Science
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：51
• 期：17
• 页码：7929-7943
• 全文大小：2,979 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803
• 卷排序：51

文摘

The objective of this work is to show the effect of carbonation at early stages on fiber–cement composites and impact on hydration, chemical and dimension stability. Carbonation increased the content of CaCO₃ polymorphs and consumed Ca(OH)₂ and other hydrated calcium phases. Micrographs and energy-dispersive spectrometry showed the CaCO₃ formed is precipitated in the pore structure of the matrix, decreasing diffusion of Si, S, and Al during hydration. Therefore, a refining process of pore sizes is produced, and fiber–matrix interface in carbonated composites was improved, leading to volume stabilization of the composite, as indicated by lower drying shrinkage and lower porosity.