Deterioration of concrete due to ASR: Experiments and multiscale modeling

The process of ASR (Alkali-Silica Reaction) induced expansion and damage in pavement concrete specimens is investigated using laboratory experiments and computational modeling. In the experimental program, the concrete specimens are subject to CS-CPT (climate simulation concrete prism test) to obtain ASR induced expansion with and without external supply of alkali. The dissolution rates of the granodiorite used in the concrete mix and the gel formation rates are determined under concrete-like conditions (pH 13.8, with/without Ca(OH)₂ and NaCl) at different temperatures. A micromechanics based computational model with aggregate-scale diffusion and reaction kinetics coupled to an Eigenstrain based micromechanics damage model is developed for the simulation of ASR induced expansion and damage. Data from the experimental program are used to calibrate and validate the computational model. Model predictions show that for the given concrete mixture, ASR induced expansion in the specimen exposed to water is predominantly governed by microcracking in the aggregate, while the expansion in the specimen subjected to external alkali supply is governed by microcracking in both the aggregates and the cement paste.

• Record URL:
  https://doi.org/10.1016/j.cemconres.2021.106575
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S0008884621002246
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Supplemental Notes:
  • © 2021 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Iskhakov, Tagir
  • Giebson, Colin
  • Timothy, Jithender J
  • Ludwig, Horst M
  • Meschke, Günther
• Publication Date: 2021-11

Language

• English

Media Info

• Media Type: Web
• Features: Figures; Photos; References; Tables;
• Serial:
  • Cement and Concrete Research
  • Volume: 149
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Alkali silica reactions; Concrete; Concrete pavements; Deterioration; Expansion; Laboratory tests; Microcracking; Simulation
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01781316
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 4 2021 4:57PM