Rights statement: This is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures, 244, 2020 DOI: 10.1016/j.compstruct.2020.112300
Accepted author manuscript, 2.12 MB, PDF document
Available under license: CC BY-NC-ND
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Dynamic compressive behavior of a novel ultra-lightweight cement composite incorporated with rubber powder
AU - Huang, Z.
AU - Sui, L.
AU - Wang, F.
AU - Du, S.
AU - Zhou, Y.
AU - Ye, J.
N1 - This is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures, 244, 2020 DOI: 10.1016/j.compstruct.2020.112300
PY - 2020/7/15
Y1 - 2020/7/15
N2 - This paper develops a novel rubberized ultra-lightweight high ductility cement composite (RULCC) with added rubber powder and low content PE fiber (0.7%), and investigates the dynamic compressive response and failure mechanism of the RULCC both experimentally and analytically. The test program examines the dynamic compressive stress-strain relationship of the RULCC through Split Hopkinson Pressure Bar (SHPB) impact tests. The results show that the rubber powder aggregates have significant effect on the compressive strength, stress-strain relations and failure mechanism of the RULCC. A volume replacement of fine aggregates with 5%, 10% and 20% rubber power results in a reduction in static compressive strength by 29.5%, 47.7% and 60.3%, respectively. The RULCC with a low fiber content of 0.7% in volume exhibits a 3% direct tensile strain, and a 4–5% tensile strain can still be achieved after 10% rubber powder is added to the RULCC, showing a high ductility of the material. The SHPB impact test shows that the compressive strength increases with strain rate. An empirical model, taking into account of the replacement ratio of the rubber powder aggregates in the RULCC, is developed in this paper to evaluate the Dynamic Increasing Factor (DIF). The experimental and analytical studies are essential to better understand the fundamental dynamic behavior of the RULCC for its further applications in engineering applications, such as protective structures, etc.
AB - This paper develops a novel rubberized ultra-lightweight high ductility cement composite (RULCC) with added rubber powder and low content PE fiber (0.7%), and investigates the dynamic compressive response and failure mechanism of the RULCC both experimentally and analytically. The test program examines the dynamic compressive stress-strain relationship of the RULCC through Split Hopkinson Pressure Bar (SHPB) impact tests. The results show that the rubber powder aggregates have significant effect on the compressive strength, stress-strain relations and failure mechanism of the RULCC. A volume replacement of fine aggregates with 5%, 10% and 20% rubber power results in a reduction in static compressive strength by 29.5%, 47.7% and 60.3%, respectively. The RULCC with a low fiber content of 0.7% in volume exhibits a 3% direct tensile strain, and a 4–5% tensile strain can still be achieved after 10% rubber powder is added to the RULCC, showing a high ductility of the material. The SHPB impact test shows that the compressive strength increases with strain rate. An empirical model, taking into account of the replacement ratio of the rubber powder aggregates in the RULCC, is developed in this paper to evaluate the Dynamic Increasing Factor (DIF). The experimental and analytical studies are essential to better understand the fundamental dynamic behavior of the RULCC for its further applications in engineering applications, such as protective structures, etc.
KW - Cement composite
KW - Lightweight concrete
KW - Rubberized concrete
KW - Split Hopkinson Pressure Bar
KW - Aggregates
KW - Bridge decks
KW - Cements
KW - Composite materials
KW - Compressive strength
KW - Ductility
KW - Dynamics
KW - Light weight concrete
KW - Mechanical testing
KW - Outages
KW - Powders
KW - Rubber
KW - Software testing
KW - Strain rate
KW - Stress-strain curves
KW - Tensile strain
KW - Well cementing
KW - Compressive stress strains
KW - Dynamic increasing factors (DIF)
KW - Engineering applications
KW - Protective structures
KW - Split Hopkinson pressure bars
KW - Static compressive strength
KW - Stress strain relation
KW - Failure (mechanical)
U2 - 10.1016/j.compstruct.2020.112300
DO - 10.1016/j.compstruct.2020.112300
M3 - Journal article
VL - 244
JO - Composite Structures
JF - Composite Structures
SN - 0263-8223
M1 - 112300
ER -