TY - JOUR
T1 - Experimental and statistical investigation of the compressive strength anisotropy in structural concrete
AU - Gustenhoff Hansen, Søren
AU - Lauridsen, Jørgen Trankjær
AU - Hoang, Linh Cao
PY - 2018/5/1
Y1 - 2018/5/1
N2 - This paper offers a new and closer look into the strength anisotropy of concrete by presenting the so far largest experimental programme (290 tests) and by presenting an advanced statistical analysis of the results. The experimental investigation sheds light on the influence of several important design parameters and conditions on the anisotropy. This includes the influence of reinforcement, w/c-ratio, curing time, load history and structural geometry. For this purpose, cores were drilled out at different angles from beam- and slab specimens for compressive testing. The main findings include: a) the reference cylinder strength (i.e. w/c-ratio) does not have a significant influence on the anisotropy when the anisotropy is quantified as an absolute difference between the strength of cores drilled in the two directions; b) the anisotropy in structural members without load history is <5 MPa; c) the anisotropy amounts to 5–10 MPa for members with load history.
AB - This paper offers a new and closer look into the strength anisotropy of concrete by presenting the so far largest experimental programme (290 tests) and by presenting an advanced statistical analysis of the results. The experimental investigation sheds light on the influence of several important design parameters and conditions on the anisotropy. This includes the influence of reinforcement, w/c-ratio, curing time, load history and structural geometry. For this purpose, cores were drilled out at different angles from beam- and slab specimens for compressive testing. The main findings include: a) the reference cylinder strength (i.e. w/c-ratio) does not have a significant influence on the anisotropy when the anisotropy is quantified as an absolute difference between the strength of cores drilled in the two directions; b) the anisotropy in structural members without load history is <5 MPa; c) the anisotropy amounts to 5–10 MPa for members with load history.
KW - Anisotropy
KW - Existing structures
KW - Assessment of load carrying capacity
KW - Statistical analysis
KW - Drilled cores
KW - Concrete compressive strength
KW - Anisotropy
KW - Assessment of load carrying capacity
KW - Concrete compressive strength
KW - Drilled cores
KW - Existing structures
KW - Statistical analysis
U2 - 10.1016/j.cemconres.2018.02.011
DO - 10.1016/j.cemconres.2018.02.011
M3 - Journal article
SN - 0008-8846
VL - 107
SP - 304
EP - 316
JO - Cement and Concrete Research
JF - Cement and Concrete Research
ER -