TY - JOUR
T1 - Impact of carbonization and aggregate properties on modeled recycled concrete
T2 - mechanical characteristics, stress concentration and damage evolution
AU - Liu, Qiong
AU - Cheng, Xingchang
AU - Sun, Chang
AU - Jin, Congkai
AU - Tam, Vivian W.Y.
PY - 2025/3/14
Y1 - 2025/3/14
N2 - Natural aggregate (NA), mortar aggregate (MA), and recycled aggregate (RA) were used to fabricate different types of concrete for compressive, splitting tensile, and shear tests. Carbonized mortar aggregate (CMA) and carbonized recycled aggregate (CRA) were obtained by carbonizing different aggregates. The natural aggregate concrete (NAC) was also carbonized to create carbonized natural aggregate concrete (CNAC). Square-modeled aggregate was used to study the impact of aggregate sharp edges on mechanical properties. Digital image correlation (DIC) and finite element method (FEM) were applied for analysis. Results show that carbonization improves the compressive, tensile, and shear capacity of concrete. The elastic modulus of both new and old mortar phases, as well as the whole concrete, is enhanced after carbonization. Aggregate and mortar elastic modulus differences, along with the number and location of aggregate tips, influence mechanical strength and damage evolution. DIC findings were validated through FEM simulation.
AB - Natural aggregate (NA), mortar aggregate (MA), and recycled aggregate (RA) were used to fabricate different types of concrete for compressive, splitting tensile, and shear tests. Carbonized mortar aggregate (CMA) and carbonized recycled aggregate (CRA) were obtained by carbonizing different aggregates. The natural aggregate concrete (NAC) was also carbonized to create carbonized natural aggregate concrete (CNAC). Square-modeled aggregate was used to study the impact of aggregate sharp edges on mechanical properties. Digital image correlation (DIC) and finite element method (FEM) were applied for analysis. Results show that carbonization improves the compressive, tensile, and shear capacity of concrete. The elastic modulus of both new and old mortar phases, as well as the whole concrete, is enhanced after carbonization. Aggregate and mortar elastic modulus differences, along with the number and location of aggregate tips, influence mechanical strength and damage evolution. DIC findings were validated through FEM simulation.
KW - Carbonization strengthening
KW - Damage evolution
KW - Modeled concrete
KW - Recycled concrete
UR - http://www.scopus.com/inward/record.url?scp=85217192222&partnerID=8YFLogxK
UR - https://go.openathens.net/redirector/westernsydney.edu.au?url=https://doi.org/10.1016/j.conbuildmat.2025.140327
U2 - 10.1016/j.conbuildmat.2025.140327
DO - 10.1016/j.conbuildmat.2025.140327
M3 - Article
AN - SCOPUS:85217192222
SN - 0950-0618
VL - 467
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 140327
ER -