| Summary: | In this paper, experimental results on restrained shrinkage test of cement mortars and light weight high performance fiber reinforced cementitious composites (HPFRCC) are presented. Two types of light weight hybrid HPFRCC and two types of premix mortars are included in the experiment. Results show the multiple cracks, as many as 49, in light weight hybrid HPFRCC specimens compared to a localized single crack in premix mortar-II and about six cracks in premix mortar-I specimen. The maximum crack width in the premix mortar-II and mortar-I specimens is about 1.4 mm and 0.40 mm, respectively. However, the scenario is quite different in light weight hybrid HPFRCC specimens, where the width of almost all cracks are less than 0.10 mm except only one crack the width of which is about 0.40 mm.
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