Figure 1.
Preparation procedure of microcapsules.
Figure 2.
Three-point flexural loading setup.
Figure 3.
Specimen preparations for water absorption.
Figure 4.
OM micrographs of microcapsules prepared: (a) ×4 (b) ×10.
Figure 5.
Load-displacement curves for blank cement paste during pre-damage: (a) standard curing (b) water curing.
Figure 6.
Reloading-displacement curves for blank cement paste after healing.
Figure 7.
Reloading-displacement curves for cement paste with 1% of microcapsules after healing.
Figure 8.
Reloading-displacement curves for cement paste with 2% of microcapsules after healing: (a) standard curing (b) water curing.
Figure 9.
Crack penetration of specimens before failure: (a) reference (b) 1% of microcapsules (c) 2% of microcapsules.
Figure 10.
Influence of content of microcapsules on flexural strength restoration of cement paste: (a) standard curing (b) water curing.
Figure 11.
Schematic load-deformation relationship of cementitious material.
Figure 12.
Influence of content of microcapsules on compressive strength restoration of cement paste: (a) standard curing (b) water curing.
Figure 13.
Effect of curing conditions on stiffness recovery of cement paste with 2% microcapsules and 60% pre-damage.
Figure 14.
Water sorption of cement paste during healing: (a) reference (b) 1% of microcapsules (c) 2% of microcapsules.
Figure 15.
SEM-EDS micrographs of damaging specimens at different stages: (a) 30%f (b) 60%f (c) capsules layout at 100%f (d) healing cracks at 100%f.