Table 1 Chemical composition of the experimental materials

Polyurea

VEGF

FRP in wt%

53.3 of 191-unsaturated polyester resin reinforced with 46.7 of fiberglass

Titanium alloy in wt%

Ti with 0.40 Mo, 0.90 Ni, 0.30 Fe, 0.08 C, 0.03 N, 0.015 H, 0.25 O

ND steel in wt%

Fe with 0.07 C, 0.56 Cr, 0.12 Ni, 0.29 Cu, 0.44 Mn, 0.073 Sb, 0.05 Sn, 0.011 P, 0.20 Si, 0.008 S, 0.014 Ti

Foam glass blocks

Borosilicate glass mixed with foaming agent, etc.