In this study, we are proposing a novel concrete-based material for jacketing bridge piers against vehicular impacts. The goal is to have a material with large dissipative capabilities (i.e., high ductility), moderate strength (because not carrying dead or live loads) and low environmental impacts. A candidate material with such characteristics is steel fiber-reinforced rubber concrete. The following mixes were investigated: (1) normal concrete with a mean compressive strength of around 70 MPa; (2) concrete with fine rubber content of 30%; (3) concrete with steel fiber content of 1.5%; (4) concrete with rubber content of 30% and steel fiber content of 1.5%. First, the compressive quasi-static performances are investigated by universal testing machine tests. Then, the dynamic compressive behavior under high strain rate is investigated by Split Hopkinson Pressure Bar tests with a diameter of 80 mm with variable gun pressure in the range of 0.3 to 0.6 MPa. The preliminary results indicate that this new material can provide enhanced dissipation performances and can be potentially suitable for full-scale application of jacketing of bridge piers against vehicular impacts.
Lai, D., Lin, L., Yan, X., Li, Z., Xu, K., Demartino, C., et al. (2022). Development of a Steel Fiber-Reinforced Rubber Concrete for Jacketing of Bridge Piers Against Vehicular Impacts: Preliminary Results. In Lecture Notes in Civil Engineering (pp.1144-1151). Springer Science and Business Media Deutschland GmbH [10.1007/978-3-030-91877-4_130].
Development of a Steel Fiber-Reinforced Rubber Concrete for Jacketing of Bridge Piers Against Vehicular Impacts: Preliminary Results
Demartino C.
;
2022-01-01
Abstract
In this study, we are proposing a novel concrete-based material for jacketing bridge piers against vehicular impacts. The goal is to have a material with large dissipative capabilities (i.e., high ductility), moderate strength (because not carrying dead or live loads) and low environmental impacts. A candidate material with such characteristics is steel fiber-reinforced rubber concrete. The following mixes were investigated: (1) normal concrete with a mean compressive strength of around 70 MPa; (2) concrete with fine rubber content of 30%; (3) concrete with steel fiber content of 1.5%; (4) concrete with rubber content of 30% and steel fiber content of 1.5%. First, the compressive quasi-static performances are investigated by universal testing machine tests. Then, the dynamic compressive behavior under high strain rate is investigated by Split Hopkinson Pressure Bar tests with a diameter of 80 mm with variable gun pressure in the range of 0.3 to 0.6 MPa. The preliminary results indicate that this new material can provide enhanced dissipation performances and can be potentially suitable for full-scale application of jacketing of bridge piers against vehicular impacts.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
