Abstract
An investigational study is conducted to examine the effects of different amounts of binders and curing methods on the mechanical behavior and ductility of Ultra-High Performance Fiber Reinforced Concretes (UHPFRCs) that contain 2% of Micro Steel Fiber (MSF). The aim is to find an optimum binder content for the UHPFRC mixes. The same water-to-binder ratio (w/b) of 0.12 was used for both water curing (WC) and steam curing (SC). Based on the curing methods, two series of eight mixes of UHPFRCs containing different binder contents ranging from 850 to 1200 kg/m3 with an increment of 50 kg/m3 were produced. Mechanical properties such as compressive strength, splitting tensile strength, static elastic module, flexural tensile strength and the ductility behavior were investigated. This study revealed that the mixture of 1150 kg/m3 binder content exhibited the highest values of the experimental results such as a compressive strength greater than 190 MPa, a splitting tensile strength greater than 12.5 MPa, and a modulus of elasticity higher than 45 GPa. The results also show that all of the improvements began to slightly decrease at 1200 kg/m3 of the binder content. On the other hand, it was concluded that SC resulted in higher mechanical performance and ductility behavior than WC.
Highlights
Developing in concrete materials can be grouped into three phases
Characteristic length length development development versus versus binder binder content. In this experimental research work, the impact of different binder content. In this experimental research work, the impact of different binder content and curing types on the performance of Ultra-High Performance Concrete Composite (UHPC) reinforced with ing micro steel fibers (MSF)
silica fume (SF)) been and curing typesThe on the performance reinforced at 0.12 +w/b observed
Summary
Developing in concrete materials can be grouped into three phases. The first phase is conventional concrete that offers normal strength. The second one is high-strength concrete (HSC), which provides higher strength and is a harder material than the former one. The third phase is HSC, which can be distinct with its high compressive strength of almost 70 MPa, flexural tensile strength of nearly 10 MPa, and the modulus of elasticity ranging between 14 and 42 GPa. Nowadays, given the enhancements on the scale of the microscope, reactive powder concrete (RPC) technology is considered a patent in the area of concrete technology known as ultra-high performance concrete [1]. The concept of RPC was first developed by Richard and Cheyrezy [2] Currently, it is considered as
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