Title:
Early-Age Cracking Resistance of Reinforced High- Strength Concrete
Author(s):
Chuyuan Wen, Dejian Shen, Yang Jiao, Ci Liu, and Ming Li
Publication:
Structural Journal
Volume:
121
Issue:
3
Appears on pages(s):
15-24
Keywords:
cracking resistance; early age; high-strength concrete (HSC); reinforcement; temperature-stress test machine (TSTM)
DOI:
10.14359/51740456
Date:
5/1/2024
Abstract:
High-strength concrete (HSC) with a low water-cement ratio (w/c)
may experience large autogenous shrinkage (AS). When shrinkage
of concrete is restrained by the subgrade, foundation, or other part
of the structure, HSC is more prone to crack. However, studies
devoted to the early-age cracking resistance of reinforced HSC
under uniaxial restrained conditions and adiabatic conditions are
still lacking. In the current research, the effect of reinforcement
percentage and reinforcement configuration on the temperature
history, shrinkage, stress, and creep behavior of reinforced HSC at
early age was analyzed using the temperature-stress test machine.
Test results showed that reinforcement could effectively restrain the
development of concrete shrinkage and creep. The cracking resistance of HSC increased with increasing reinforcement percentage, evaluated by the integrated criterion. With the same reinforcement percentage, reinforced HSC with distributed reinforcement along with a proper thickness of concrete cover exhibited higher cracking resistance compared with that of central reinforcement.