Research Article Open Access

Restrained Shrinkage-Induced Cracking of Light Weight High Performance Fiber Reinforced Cementitious Composites

Shaikh Faiz Uddin Ahmed1 and Hirozo Mihashi2
  • 1 , Afganistan
  • 2 ,
American Journal of Engineering and Applied Sciences
Volume 2 No. 4, 2009, 775-780

DOI: https://doi.org/10.3844/ajeassp.2009.775.780

Submitted On: 22 July 2009 Published On: 31 December 2009

How to Cite: Ahmed, S. F. U. & Mihashi, H. (2009). Restrained Shrinkage-Induced Cracking of Light Weight High Performance Fiber Reinforced Cementitious Composites. American Journal of Engineering and Applied Sciences, 2(4), 775-780. https://doi.org/10.3844/ajeassp.2009.775.780

Abstract

Problem statement: Shrinkage induced cracking cause damage to reinforced concrete structures. An experimental study was conducted on restrained shrinkage test of cement mortar and light weight High Performance Fiber Reinforced Cementitious Composites (HPFRCC). Approach: Two types of light weight HPFRCC and a premix mortar containing small amount of fiber were included in the experiment. Results: Results showed the multiple cracks, as many as 49, in light weight HPFRCC specimens compared to few cracks (about six cracks) in the premix mortar specimen. At the end of shrinkage test, the width of the cracks in the mortar specimen was more than 250 μm with the largest crack width of about 400 μm. However, the scenario was quite different in light weight HPFRCC specimens, where the width of almost all cracks was less than 100 μm. Conclusion: The higher number of multiple cracks with small cracks width in light weight HPFRCC specimens due to drying shrinkage was due to their strain hardening and ductile behavior compared to quasi brittle behavior of premix mortar where less number of wide cracks was observed.

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Keywords

  • Shrinkage
  • high performance fiber reinforced cementitious composites
  • Cement mortar