Patent ID: 7901769

Claim:
A corrosion resistant steel reinforcing rod system, comprising: a steel reinforcing rod having a coefficient of thermal expansion of between about 14 ppm/° C. and about 17 ppm/° C.; and a vitreous shell substantially encapsulating the steel reinforcing rod; wherein the vitreous shell has a composition selected from the group consisting essentially, in weight percent, of about 33-45% SiO 2, 3.5-4.6% Al 2 O 3, 13.5-19.5% B 2 O 3, 4-13.5% K 2 O, and 5.5-15.5% ZrO 2 ; and wherein the vitreous shell has a coefficient of thermal expansion between about 12.5 ppm/° C. and about 13.5 ppm/° C.