Hybrid Composite Beam Use Faces Proprietary Challenges

摘要

Five years after a fully loaded locomotive and 26 coal cars chugged over a 30-ft-long, 17-ft-wide span comprising eight hybrid composite beams (HCB) in Colorado, the technology has been used in nine states. An HCB consists of a glass-fiber-reinforced plastic shell with high-strength continuous steel fibers placed along die bottom flange and filled with self-consolidating concrete (ENR 4/12/10 p. 34).