3.3 Free shrinkage The free shrinkage curves in Figure 4 show the shrinkage for each series of specimens. The control specimen had the highest shrinkage as expected. PVA and steel FRC with the lowest fiber content (PVA1 and SF1) did not show any significant shrinkage compared to plain concrete. The PVA3 mix with 0.15% fiber had the least shrinkage. In all the mixes, it was observed that with increase in fiber volume, shrinkage increased rapidly for the first 2-3 days and declined within two weeks. This rapid rate of shrinkage during the first 2 days can