Fig. 4  | Scientific Reports

Fig. 4 

From: Effect of vibration duration on strength and permeability of pervious concrete with recycled aggregate and low-carbon cements

Fig. 4 

Specimen during scanning under a digital microscope (left); merged high-resolution image of the top surface of specimen P2w4 (70 × 70 mm, × 30 magnification) (center); and processed binary image used for digital porosity analysis, with segmented pores highlighted in red (right). All images correspond to mix P2 with 60 s vibration (w4).

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