Experimental Simulation of Surface Cracking in Concrete Structures Affected by AAR

Alkali-aggregate reaction (AAR) is a slow expansive reaction that occurs in concrete between the alkali in cement and reactive aggregates, leading to spalling and strength loss of the concrete. This reaction takes years to develop and the speed of reaction depends on several material and environmental parameters. In order to develop and test corrective solutions to this problem in a reasonable laboratory timeframe, it is possible to accelerate AAR by using extremely reactive materials under carefully controlled environments. This paper presents a new approach that was developed to simulate AAR-like expansion and random surface cracking in just a few days without the need for a controlled environment. After testing different approaches, the successful approach consisted of the combined use of pervious concrete and expansive cement paste. It was found that the cracking patterns obtained on cylindrical and prismatic concrete specimens were very similar to those found in real structures affected by AAR.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780415593168
• Corporate Authors:

  CRC Press/Balkema

  P.O. Box 447
  2300 AK Leiden,   Netherlands 
• Authors:
  • Nery, G
  • Helene, P
  • Cusson, D
  • Margeson, J C
• Conference:
  • Sixth International Conference on Concrete under Severe Conditions: Environment and Loading
  • Location: Merida Yucatan, Mexico
  • Date: 2010-6-7 to 2010-6-9
• Publication Date: 2010-7-5

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: pp 65-73
• Monograph Title: Concrete under Severe Conditions: Environment and Loading. Proceedings of the 6th International Conference on Concrete Under Severe Conditions (CONSEC'10), Merida, Yucatan, Mexico, 7-9 June 2010

Subject/Index Terms

• TRT Terms: Accelerated tests; Alkali aggregate reactions; Cement paste; Concrete; Concrete structures; Cracking; Expansion; Expansive cement
• Uncontrolled Terms: Pervious concrete
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01373585
• Record Type: Publication
• ISBN: 9780415593168
• Files: TRIS
• Created Date: Jun 25 2012 9:39AM