evaluation of ultrahighperformance concrete

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RESEARCH: Evaluation of Ultra-High-Performance Concrete ...

Ultra-high performance concrete (UHPC) is a relatively recent advancement in cementitious composite materials with mechanical and durability properties which far exceed those of conventional concrete.

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Laboratory Evaluation of Ultrahigh-Performance Concrete ...

With its superior strength and durability, ultrahigh-performance concrete (UHPC) has been used as an alternative grout material to reduce shear key cracking and enhance load transfer. The objective of the present research was to evaluate the performance of UHPC in shear keys using direct shear, direct tension, and flexural tests.

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(PDF) Fracture Evaluation of Ultra-High-Performance Fiber ...

The development of numerical simulation for Ultra-high-performance concrete (UHPC) and Ultra-high-performance fiber-reinforced concretes (UHPFRC) is fundamental for the design and construction of...

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Evaluation and optimization of Ultra-High Performance ...

2018-7-20  1. Introduction. Recently, the rising threat of corrosion by seawater on the offshore structures has promoted fast development of construction materials, in order to enhance the resistance of key cement-based components of buildings and infrastructures against high concentration of saline water .As one of the notable representatives, Ultra-High Performance Concrete (UHPC) which is ...

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Fracture evaluation of ultra-high-performance fiber ...

2021-2-1  The ultra-high-performance concrete (UHPC) and ultra-high performance fiber reinforced concrete (UHPFRC) are cementitious material with favorable material properties, including high strength (compressive strength > 150 MPa and tensile strength > 8 MPa) and

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Evaluation of ultra-high-performance-fiber reinforced ...

2013-12-1  1. Introduction. To date, the worldwide use of ultra-high-performance-fiber reinforced concrete (UHP-FRC) in structural applications has significantly increased owing to its numerous advantages compared with conventional concrete such as normal concrete (NC) and high-performance concrete (HPC) , .UHP-FRC has superior properties such as enhanced strength, durability, and long

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Mechanical and thermal evaluation of Ultra High ...

2012-1-1  Highlights Study of UHPFRC: superplasticized silica fume concrete reinforced with steel fibers. Evaluation of UHPFRC thermal conductivity coefficient. Evaluation of UHPFRC drilling characteristics to test its suitability to be machined. Evaluation of possible field of application for UHPFRC in mechanical engineering.

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(PDF) Evaluation of Bonding Shear Performance of Ultra ...

2016-5-12  the first-stage concrete during th e 60-min delay after the pouring, which resu lts in a sound bonding shear performance. With the UHPC specimens, the ratio s of decrea se in the bonding s hear ...

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Evaluation of modulus of elasticity of ultra-high ...

2017-10-30  For the UHPC developed in this study, the binder consisted of Portland cement (Type I) and condensed silica fume. Two types of fine aggregates were used in the UHPC mixtures as shown in Fig. 2.Fine-1 is the Arkansas River sand that has a natural gradation with 90% of the particles less than 1 mm as illustrated in Fig. 3a. The researchers additionally used Class C fly ash, which had an average ...

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Determination and evaluation of Holmquist-Johnson-Cook ...

The strain rate constant C can be determined by the SHPB test of UHPC specimens. The published test data of the SHPB test is shown in Fig. 4, , , , , where the strain rate ranges from 24.9 s −1 to 1234.8 s −1 and the uniaxial compressive strengths and steel fiber ratios for the specimen range from 98.3 MPa to 200 MPa and from 0% to 3%, respectively.

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RESEARCH: Evaluation of Ultra-High-Performance Concrete ...

Concrete bond testing was conducted with Ductal® and the best performing mix design developed, mix J3. Modulus of rupture style specimens with dimensions based on ASTM C78 (6 in. x 6 in. x 20 in.) were cast for evaluating the effect of different concrete surface preparations and interface orientations on bond between UHPC and the base concrete.

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Performance evaluation of ultra-high performance concrete ...

2020-10-5  Ultra-high performance concrete is a blended composite material mainly based on cement. Since a standard definition to describe the material is not available so far it is often defined with its distinctive properties being compressive, flexure and split

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Evaluation of Ultra-High-Performance Fiber-Reinforced Concrete

2021-8-12  Evaluation of high-performance fiber-reinforced concrete for bridge deck connections, closure pours, and joints : final report. [PDF - 714.55 KB] Published Date:

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(PDF) Evaluation of Bond Strength between Ultra-High ...

Ultra-high-performance concrete (UHPC) is an advanced, durable cementitious material with excellent mechanical properties, which makes it an appropriate material for strengthening, repair, and ...

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Evaluation of Ultra-High Performance Concrete Grout ...

2017-9-7  Evaluation of Ultra-High Performance Concrete Grout Performance under Longitudinal Shear ... shear keys that will not develop longitudinal cracks and enhance transverse load transfer between high strength concrete (HSC) girders. Due to the difference in the thermal expansion coefficients of HSC and UHPC, thermal cycles may induce longitudinal ...

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Flexural Behaviour and Evaluation of Ultra-high ...

2021-7-9  In the present study, specimens with four different dimensions and concrete beams with six different reinforcement ratios were prepared to investigate the properties and flexural behaviour of ultra-high-performance fibre reinforced concrete (UHPFRC) cured at 20 ºC. The standard cubic compressive ...

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Evaluation of Bond Strength between Ultra-High

2021-7-15  Evaluation of Bond Strength between Ultra-High-Performance Concrete and Normal Strength Concrete: An Overview Abdulwarith Ibrahim Bibi Farouk* S.I. Harunaa School of Civil Engineering, Tianjin University, Tianjin 300350, China *Corresponding author: [email protected] Received 04 February 2020, Received in revised form 16 April 2020

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Mix design and performance evaluation of ultra-high ...

Keywords: Ultra-high Performance Concrete, mix design, performance evaluation, basalt aggregate, powder content 1 Introduction Ultra-High Performance Concrete (UHPC) is a relatively new building material, which has been fabricated since 1990s. Compared to conventional concrete, it has superior mechanical strength,

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(PDF) Evaluation of modulus of elasticity of ultra-high ...

Moreover, four base concrete mixes with water-to-cement ratios (W/C) of 0.35, 0.4, 0.45, and 0.5 are produced, and the slump, compressive, tensile and flexural strengths, modulus of elasticity and ...

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[PDF] Evaluation of Mechanical Property and Self-healing ...

Herein we investigate the mechanical and self-healing properties of ultra-high-performance fiber-reinforced concrete (UHPFRC) at cryogenic temperatures. To this end, a comparative analysis was conducted on the effects of two types of reinforcing fibers, medium-length straight with a length of 19.5 mm and twisted fiber with a length of 30 mm, on the mechanical properties and resistance to ...

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Evaluation of Ultra-High-Performance Fiber-Reinforced ...

2011-8-30  Evaluation of Ultra-High-Performance Fiber-Reinforced Concrete The Virginia Center for Transportation Innovation and Research, a partnership between the Virginia Department of Transportation and the University of Virginia, has released a report that evaluates use of ultra-high-performance fiber-reinforced concrete on a bridge in Virginia.

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Mix design and properties evaluation of Ultra-High ...

The cement used in this study is Ordinary Portland Cement (OPC) CEM I 52.5 R, provided by ENCI (the Netherlands). A polycarboxylic ether based superplasticizer is used to adjust the workability of concrete. The limestone and quartz powder are used as fillers to replace cement. Two types of

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Technical Paper Optimization and evaluation of ultra high ...

2020-7-16  tional concrete. UHPC has several advantages over conventional concrete but the use of it is limited due to the high cost and limited design codes. Methodology for production and development of UHPC needs to be established. The paper covers both optimization and evaluation of Ultra-High-Performance Con-

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Damage evaluation of ultra-high performance concrete ...

2018-3-8  Damage evaluation of ultra-high performance concrete columns after blast loads Jun Li and Chengqing Wu International Journal of Protective Structures 2018 9 : 1 , 44-64

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Evaluation of bond strength between fire-damaged normal ...

2016-10-3  This study aims to investigate and compare the interfacial bond characteristics between fire-damaged normal concrete substrate and ultra-high-performance fiber-reinforced concrete (UHPFRC) as a repair material.,First, fire-damaged normal concrete was prepared. Then, with a cast surface, the substrate was subjected to different surface moisture conditions.

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New development of ultra-high-performance concrete

2021-8-17  Ultra-high-performance concrete (UHPC) is a type of cement-based composite for new construction and/or restoration of existing structures to extend

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Evaluation of Bonding Shear Performance of Ultra-High ...

Evaluation of Bonding Shear Performance of Ultra-High-Performance Concrete with Increase in Delay in Formation of Cold Joints . By Han-Seung Lee, Hyun-O Jang and Keun-Hee Cho. Cite . BibTex; Full citation; Publisher: MDPI AG. Year: 2016. DOI identifier: 10.3390/ma9050362. OAI identifier: Provided ...

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Evaluation of bond strength between fire-damaged normal ...

Purpose This study aims to investigate and compare the interfacial bond characteristics between fire-damaged normal concrete substrate and ultra-high-performance fiber-reinforced concrete (UHPFRC) as a repair material. Design/methodology/approach First, fire-damaged normal concrete was prepared. Then, with a cast surface, the substrate was subjected to different surface moisture conditions.

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Evaluation of Bond Strength between Normal Concrete ...

Evaluation of Bond Strength between Normal Concrete Substrate and Ultra High Performance Fiber Concrete as a Repair Material Bassam A. Tayeh a* , B H Abu

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Structural performance of ultra-high-performance concrete ...

In this study, ten large ultra-high-performance concrete (UHPC) beams reinforced with steel rebars were fabricated and tested. The experimental parameters included reinforcement ratio and steel fiber type. Two different reinforcement ratios (ρ= 0.94% and 1.50%) and steel fiber types (smooth and twisted steel fibers) were adopted.

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