Title:
Stress/Damage Detection with Smart Concrete
Author(s):
Liu
Publication:
Web Session
Volume:
ws_F23_Liu.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/29/2023
Abstract:
The piezoresistivity response of fiber-reinforced cement mortar with graphene nano-platelets is reported. Using a small quantity (0.25% by the weight of cement) of nano-sized conductive particles of graphene turned cement-based fiber-reinforced composite into a semiconductive stress-sensing material. The resistivity was measured using a surface resistivity test-er which employs an alternating current through four electrodes. Tension and compression tests of standard specimens were used to establish the relationship between the resistivity and the applied strain. Finite element analyses were employed to predict the resistivity of the slab specimen under three-point bending. The test results and simulation indicate that the electrical resistivity of the graphene-cement composite material can be tuned for structural health monitoring and damage detection.