Abstract
In this study strain distribution calculated by digital image correlation method (DICM) was used to evaluate the efficacy of alkali-resistant glass (ARG) fiber mesh in controlling distribution of strain due to drying shrinkage. Digital images of mortars with ARG fiber mesh in a dry environment (30℃, 40%RH) were obtained by using a full-field strain measuring device with a line scanner, and surface strain distribution in them was calculated by the DICM. The results showed that local strain in the mortar reinforced with ARG fiber mesh was effectively distributed, and that the effect was dependent on the orientation of ARG fiber mesh embedded in the mortar. It was also found that the DICM could be applied to detection of strain concentration and development of micro cracks as well as to prediction of the development of visible cracks in concrete.
