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An Experimental Evaluation of Direct Tensile Strength for Ultra-high Performance Concrete
Ultra-high performance concrete (UHPC) has emerged as an advanced material due to its superior mechanical properties and excellent durability. In addition to very high compressive strength exceeding 150 MPa, the tensile strength of UHPC is much larger than that of normal concrete and considered as an important parameter in structural design. To determine the tensile strength, test methods usually include the splitting test, double punch test, flexural test, and direct tension test. Therefore, it is needed to evaluate these methods to get accurate values of tensile strength of UHPC and UHPFRC. The direct tension tests were adopted by many researchers and also considered as a reliable method. In this study, direct tension tests were conducted to evaluate the tensile strength of UHPC. The UHPC was designed to obtain a nominal compressive strength varying between 150 and 200 MPa at the age of 28 days. In addition to plain UHPC, micro steel fibers were added into UHPC mixture with volumes of 1% and 2%. There were two types of prisms for direct tensile tests: (1) Prisms of 40 × 40 × 160 mm without notches; (2) Notched prisms of 40 × 40 × 80 mm. The difference between the direct tension tests on prisms with and without notches was clarified and discussed. Finally, the tensile strengths of UHPC and UHPFRC obtained from this study were compared with those suggested by several guidelines.
An Experimental Evaluation of Direct Tensile Strength for Ultra-high Performance Concrete
Ultra-high performance concrete (UHPC) has emerged as an advanced material due to its superior mechanical properties and excellent durability. In addition to very high compressive strength exceeding 150 MPa, the tensile strength of UHPC is much larger than that of normal concrete and considered as an important parameter in structural design. To determine the tensile strength, test methods usually include the splitting test, double punch test, flexural test, and direct tension test. Therefore, it is needed to evaluate these methods to get accurate values of tensile strength of UHPC and UHPFRC. The direct tension tests were adopted by many researchers and also considered as a reliable method. In this study, direct tension tests were conducted to evaluate the tensile strength of UHPC. The UHPC was designed to obtain a nominal compressive strength varying between 150 and 200 MPa at the age of 28 days. In addition to plain UHPC, micro steel fibers were added into UHPC mixture with volumes of 1% and 2%. There were two types of prisms for direct tensile tests: (1) Prisms of 40 × 40 × 160 mm without notches; (2) Notched prisms of 40 × 40 × 80 mm. The difference between the direct tension tests on prisms with and without notches was clarified and discussed. Finally, the tensile strengths of UHPC and UHPFRC obtained from this study were compared with those suggested by several guidelines.
An Experimental Evaluation of Direct Tensile Strength for Ultra-high Performance Concrete
RILEM Bookseries
Serna, Pedro (editor) / Llano-Torre, Aitor (editor) / Martí-Vargas, José R. (editor) / Navarro-Gregori, Juan (editor) / Le, An Hoang (author)
RILEM-fib International Symposium on Fibre Reinforced Concrete ; 2021 ; Valencia, Spain
Fibre Reinforced Concrete: Improvements and Innovations II ; Chapter: 82 ; 958-964
RILEM Bookseries ; 36
2021-09-05
7 pages
Article/Chapter (Book)
Electronic Resource
English
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