Evaluation of Mechanical Properties on High Performance Concrete using Steel Fibres

This study describes an extensive experimental investigation of various mechanical properties of Ultra-High-Performance Fibre-Reinforced Concrete (UHPFRC). The scope is to achieve high strength and ductile behaviour, hence providing optimal resistance to projectile impact. Eight different mixtures were produced and tested, three mixtures of Ultra-High-Performance Concrete (UHPC) and five mixtures of UHPFRC, by changing the amount and length of the steel fibres, the quantity of the superplasticizer, and the water to binder (w/b) ratio. Full stress–strain curves from compression, direct tension, and flexural tests were obtained from one batch of each mixture to examine the influence of the above parameters on the mechanical properties. The Poisson’s ratio and modulus of elasticity in compression and direct tension were measured. Additionally, a factor was determined to convert the cubic strength to cylindrical. Based on the test results, the mixture with high volume (6%) and a combination of two lengths of steel fibres (3% each), water to binder ratio of 0.16% and 6.1% of superplasticizer to binder ratio exhibited the highest strength and presented great deformability in the plastic region. A numerical simulation developed using ABAQUS was capable of capturing very well the experimental three-point bending response of the UHPFRC best-performed mixture.

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BEHAVIOUR OF MECHANICAL PROPERTIES OF ULTRA-HIGH PERFORMANCE CONCRETE WITH STEEL FIBRES AND MINERAL ADMIXTURES

International Journal of Research in Engineering and Technology ◽

10.15623/ijret.2016.0509046 ◽

2016 ◽

Vol 05 (09) ◽

pp. 299-305

Author(s):

Manoj V .

Keyword(s):

Mechanical Properties ◽

High Performance ◽

High Performance Concrete ◽

Mineral Admixtures ◽

Ultra High Performance Concrete ◽

Steel Fibres

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Mechanical properties and durability of high - performance concrete for bridge decks

PCI Journal ◽

10.15554/pcij.07012008.108.130 ◽

2008 ◽

Vol 53 (4) ◽

pp. 108-130

Author(s):

Mohsen A. Issa ◽

Atef A. Khalil ◽

Shahidul Islam ◽

Paul D. Krauss

Keyword(s):

Mechanical Properties ◽

High Performance ◽

High Performance Concrete ◽

Bridge Decks

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Investigation of mechanical properties and shrinkage of ultra-high performance concrete: Influence of steel fiber content and shape

Composites Part B Engineering ◽

10.1016/j.compositesb.2019.107021 ◽

2019 ◽

Vol 174 ◽

pp. 107021 ◽

Cited By ~ 18

Author(s):

Zemei Wu ◽

Caijun Shi ◽

Kamal Henri Khayat

Keyword(s):

Mechanical Properties ◽

High Performance ◽

Steel Fiber ◽

High Performance Concrete ◽

Fiber Content ◽

Ultra High Performance Concrete

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Influence of Rapid Heat Treatment on the Shrinkage and Strength of High-Performance Concrete

Materials ◽

10.3390/ma14154102 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4102

Author(s):

Jan Stindt ◽

Patrick Forman ◽

Peter Mark

Keyword(s):

Heat Treatment ◽

High Performance ◽

High Performance Concrete ◽

Treatment Time ◽

Precast Concrete ◽

Concrete Strength ◽

Shrinkage Strain ◽

Temperature Treatment ◽

Production Flow ◽

Steel Fibres

Resource-efficient precast concrete elements can be produced using high-performance concrete (HPC). A heat treatment accelerates hardening and thus enables early stripping. To minimise damages to the concrete structure, treatment time and temperature are regulated. This leads to temperature treatment times of more than 24 h, what seems too long for quick serial production (flow production) of HPC. To overcome this shortcoming and to accelerate production speed, the heat treatment is started here immediately after concreting. This in turn influences the shrinkage behaviour and the concrete strength. Therefore, shrinkage is investigated on prisms made from HPC with and without steel fibres, as well as on short beams with reinforcement ratios of 1.8% and 3.1%. Furthermore, the flexural and compressive strengths of the prisms are measured directly after heating and later on after 28 d. The specimens are heat-treated between 1 and 24 h at 80 °C and a relative humidity of 60%. Specimens without heating serve for reference. The results show that the shrinkage strain is pronouncedly reduced with increasing temperature duration and rebar ratio. Moreover, the compressive and flexural strength decrease with decreasing temperature duration, whereby the loss of strength can be compensated by adding steel fibres.

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The Mechanical Properties and Damage Evolution of UHPC Reinforced with Glass Fibers and High-Performance Polypropylene Fibers

Materials ◽

10.3390/ma14092455 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2455

Author(s):

Jiayuan He ◽

Weizhen Chen ◽

Boshan Zhang ◽

Jiangjiang Yu ◽

Hang Liu

Keyword(s):

Mechanical Properties ◽

Glass Fiber ◽

Damage Evolution ◽

High Performance ◽

High Performance Concrete ◽

Glass Fibers ◽

Ultra High Performance Concrete ◽

Concrete Damaged Plasticity ◽

The Difference ◽

Experimental Values

Due to the sharp and corrosion-prone features of steel fibers, there is a demand for ultra-high-performance concrete (UHPC) reinforced with nonmetallic fibers. In this paper, glass fiber (GF) and the high-performance polypropylene (HPP) fiber were selected to prepare UHPC, and the effects of different fibers on the compressive, tensile and bending properties of UHPC were investigated, experimentally and numerically. Then, the damage evolution of UHPC was further studied numerically, adopting the concrete damaged plasticity (CDP) model. The difference between the simulation values and experimental values was within 5.0%, verifying the reliability of the numerical model. The results indicate that 2.0% fiber content in UHPC provides better mechanical properties. In addition, the glass fiber was more significant in strengthening the effect. Compared with HPP-UHPC, the compressive, tensile and flexural strength of GF-UHPC increased by about 20%, 30% and 40%, respectively. However, the flexural toughness indexes I5, I10 and I20 of HPP-UHPC were about 1.2, 2.0 and 3.8 times those of GF-UHPC, respectively, showing that the toughening effect of the HPP fiber is better.

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Comparative Study of High-Performance Concrete Characteristics and Loading Test of Pretensioned Experimental Beams

Crystals ◽

10.3390/cryst11040427 ◽

2021 ◽

Vol 11 (4) ◽

pp. 427

Author(s):

Pavlina Mateckova ◽

Vlastimil Bilek ◽

Oldrich Sucharda

Keyword(s):

Mechanical Properties ◽

High Performance ◽

High Performance Concrete ◽

Raw Materials ◽

Load Capacity ◽

Materials Testing ◽

Loading Test ◽

Conventional Concrete ◽

Concrete Mechanical Properties ◽

Normal Strength

High-performance concrete (HPC) is subjected to wide attention in current research. Many research tasks are focused on laboratory testing of concrete mechanical properties with specific raw materials, where a mixture is prepared in a relatively small amount in ideal conditions. The wider utilization of HPC is connected, among other things, with its utilization in the construction industry. The paper presents two variants of HPC which were developed by modification of ordinary concrete used by a precast company for pretensioned bridge beams. The presented variants were produced in industrial conditions using common raw materials. Testing and comparison of basic mechanical properties are complemented with specialized tests of the resistance to chloride penetration. Tentative expenses for normal strength concrete (NSC) and HPC are compared. The research program was accomplished with a loading test of model experimental pretensioned beams with a length of 7 m made of ordinarily used concrete and one variant of HPC. The aim of the loading test was to determine the load–deformation diagrams and verify the design code load capacity calculation method. Overall, the article summarizes the possible benefits of using HPC compared to conventional concrete.

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