Fiber for recycled aggregate concrete reinforcement: a review

Abstract

Recycled aggregate concrete (RAC) has a significant opposite potential on environmental protection and improvement for its low CO₂ emission during the processing procedure. Performance of RAC may lower than natural aggregate concrete (NAC) mixed from traditional materials, thus various measures are optimized for enhancing the property of RAC to an acceptable level. Researches show that the use of polypropylene (PP) fibers, polyvinyl alcohol (PVA) fibers and basalt fibers (BF) can obviously increase the flexural and split-tensile strength of RAC, and has little effect on the durability of RAC. Some theories are developed by micro-structure analysis on RAC, yet more facts need to be studied and verified in future researches. An important route is to disclose the mechanism of uniform distribution of fibers and nano-materials during RAC mixing and reduce the negative impact of agglomeration of such added materials.

Keywords:

• Fiber reinforcement
• sustainable
• recycled aggregate concrete
• properties improvement

Disclosure statement

The authors declare no conflict of interest.