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Science China Technological Sciences

, Volume 53, Issue 6, pp 1540–1553 | Cite as

Reverse extraction of early-age hydration kinetic equation from observed data of Portland cement

  • Lin Wang
  • Bo Yang
  • XiuYang Zhao
  • YueHui Chen
  • Jun Chang
Article

Abstract

The early-age hydration of Portland cement paste has an important impact on the formation of microstructure and development of strength. However, manual derivation of hydration kinetic equation is very difficult because there are multi-phased, multi-sized and interrelated complex chemical and physical reactions during cement hydration. In this paper, early-age hydration kinetic equation is reversely extracted automatically from the observed time series of hydration degree of Portland cement using evolutionary computation method that combines gene expression programming and particle swarm optimization algorithms. In order to reduce the computing time, GPUs are used for acceleration in parallel. Studies have shown that according to the extracted kinetic equation, simulation curve of early-age hydration is in good accordance with the observed experimental data. Furthermore, this equation still has a good generalization ability even changing chemical composition, particle size and curing conditions.

Keywords

Portland cement hydration kinetic equation reverse extraction gene expression programming particle swarm optimization 

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Lin Wang
    • 1
  • Bo Yang
    • 2
  • XiuYang Zhao
    • 1
    • 2
  • YueHui Chen
    • 2
  • Jun Chang
    • 3
  1. 1.School of Computer Science and TechnologyShandong UniversityJinanChina
  2. 2.Provincial Key Laboratory for Network-based Intelligent ComputingUniversity of JinanJinanChina
  3. 3.School of Material Science and EngineeringUniversity of JinanJinanChina

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