Mechanical Testing of Composite Steel and Reactive Powder Concrete Structural Element
Reactive powder concrete (RPC), typically with higher compressive strength, is particularly attractive to structural engineers to apply them in infrastructures for enhancing their resistance under severe environments and loads. The main objective of the initial study presented in the paper was to in...
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doaj-66624f423071465eb3257bf2b3f8ccf52020-11-25T01:58:55ZengMDPI AGMaterials1996-19442020-09-01133954395410.3390/ma13183954Mechanical Testing of Composite Steel and Reactive Powder Concrete Structural ElementJan Bujnak0Peter Michalek1Frantisek Bahleda2Stefania Grzeszczyk3Aneta Matuszek-Chmurowska4Arkadiusz Mordak5Faculty of Civil Engineering, University of Žilina, Univerzitná 78215/1, 010 26 Žilina, SlovakiaFaculty of Civil Engineering, University of Žilina, Univerzitná 78215/1, 010 26 Žilina, SlovakiaFaculty of Civil Engineering, University of Žilina, Univerzitná 78215/1, 010 26 Žilina, SlovakiaFaculty of Civil Engineering, Opole University of Technology, Katowicka 48, 45 061 Opole, PolandFaculty of Civil Engineering, Opole University of Technology, Katowicka 48, 45 061 Opole, PolandFaculty of Civil Engineering, Opole University of Technology, Katowicka 48, 45 061 Opole, PolandReactive powder concrete (RPC), typically with higher compressive strength, is particularly attractive to structural engineers to apply them in infrastructures for enhancing their resistance under severe environments and loads. The main objective of the initial study presented in the paper was to investigate the behavior of two types of these new cementitious materials differing in the nature of microfibers. The RPC mixes were reinforced with steel and then with basalt microfibers. To evaluate the structural performance of developed unconventional materials, properties were investigated experimentally and compared with the control normal concrete mix. Mechanical tests indicated that dispersing fine fibers for making RPC, a mean compressive strength of 198.3 MPa and flexural strength 52.6 MPa or 23.2 MPa, respectively, were developed after 28 days of standard curing at ambient temperatures. In composite structures consisting of steel girders and a concrete slab, it is necessary to prevent the relative slip at the steel and concrete interface using shear connectors. The very high RPC strength enabled a material saving, weight-reduced application of precast construction, and particularly effective joint to steel beams. The investigation of such shear connection efficiency, in the case of the higher strength concrete deck, using standard push-out test specimens was executed. Finite element numerical models were developed. The outputs of the studies are presented in the paper.https://www.mdpi.com/1996-1944/13/18/3954reactive powder concretematerial property testcomposite elementnumerical modeling |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jan Bujnak Peter Michalek Frantisek Bahleda Stefania Grzeszczyk Aneta Matuszek-Chmurowska Arkadiusz Mordak |
spellingShingle |
Jan Bujnak Peter Michalek Frantisek Bahleda Stefania Grzeszczyk Aneta Matuszek-Chmurowska Arkadiusz Mordak Mechanical Testing of Composite Steel and Reactive Powder Concrete Structural Element Materials reactive powder concrete material property test composite element numerical modeling |
author_facet |
Jan Bujnak Peter Michalek Frantisek Bahleda Stefania Grzeszczyk Aneta Matuszek-Chmurowska Arkadiusz Mordak |
author_sort |
Jan Bujnak |
title |
Mechanical Testing of Composite Steel and Reactive Powder Concrete Structural Element |
title_short |
Mechanical Testing of Composite Steel and Reactive Powder Concrete Structural Element |
title_full |
Mechanical Testing of Composite Steel and Reactive Powder Concrete Structural Element |
title_fullStr |
Mechanical Testing of Composite Steel and Reactive Powder Concrete Structural Element |
title_full_unstemmed |
Mechanical Testing of Composite Steel and Reactive Powder Concrete Structural Element |
title_sort |
mechanical testing of composite steel and reactive powder concrete structural element |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-09-01 |
description |
Reactive powder concrete (RPC), typically with higher compressive strength, is particularly attractive to structural engineers to apply them in infrastructures for enhancing their resistance under severe environments and loads. The main objective of the initial study presented in the paper was to investigate the behavior of two types of these new cementitious materials differing in the nature of microfibers. The RPC mixes were reinforced with steel and then with basalt microfibers. To evaluate the structural performance of developed unconventional materials, properties were investigated experimentally and compared with the control normal concrete mix. Mechanical tests indicated that dispersing fine fibers for making RPC, a mean compressive strength of 198.3 MPa and flexural strength 52.6 MPa or 23.2 MPa, respectively, were developed after 28 days of standard curing at ambient temperatures. In composite structures consisting of steel girders and a concrete slab, it is necessary to prevent the relative slip at the steel and concrete interface using shear connectors. The very high RPC strength enabled a material saving, weight-reduced application of precast construction, and particularly effective joint to steel beams. The investigation of such shear connection efficiency, in the case of the higher strength concrete deck, using standard push-out test specimens was executed. Finite element numerical models were developed. The outputs of the studies are presented in the paper. |
topic |
reactive powder concrete material property test composite element numerical modeling |
url |
https://www.mdpi.com/1996-1944/13/18/3954 |
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