Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 178, Issue -, Pages 102-111Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2018.05.152
Keywords
Steel fiber reinforcement; Ultra-high strength concrete (UHSC); Static mechanical properties; Dynamic compressive properties; Split Hopkinson press bar (SHPB)
Categories
Funding
- National Key Basic Research and Development Program of China [2016YFC0701100, 2015CB058000]
Ask authors/readers for more resources
Nowadays, high-rise, long-span and complicated structures are springing up. Accordingly, there is an increasing need for concretes with high strength even ultra-high strength, low cost and low construction difficulties. In the present study, steel fiber reinforced ultra-high-strength concrete (SFR-UHSC) was designed and produced with common materials and standard curing methods. To obtain a good performance, a low water-to-binder ratio of 0.22, a superplasticizer and several readily available mineral admixtures were applied. Static mechanical and Split Hopkinson press bar tests were carried out to evaluate the mechanical performances of SFR-UHSC. It is found that under static loadings, SFR-UHSC exhibits good ductility, toughness and plasticity. In details, compared with cubic and prism compressive strengths as well as Young's modulus of SFR-UHSC, much more increases of splitting tensile and flexural strengths are obtained by the introduction of steel fibers. When the volume fraction of steel fiber increases, the ratio between prism and cubic compressive strengths decreases while the ratio of tensile strength to compressive strength increases. On the other hand, in the scenario of high strain rate, SFR-UHSC has a good energy absorption capacity and compressive toughness. When subjected to impact loadings, SFR-UHSC cracks along various paths without fragmentation. Moreover, dynamic compressive strength is increased by both increasing strain rate and steel fiber content while its strain rate effect is slightly lower than that of ordinary concrete. (C) 2018 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available