Behaviour of different types of fibre reinforced concrete without admixture

2016 ◽  
Vol 113 ◽  
pp. 328-334 ◽  
Author(s):  
Messaoud Saidani ◽  
Danah Saraireh ◽  
Michael Gerges
Keyword(s):  
Reinforced Concrete ◽  
Fibre Reinforced Concrete ◽  
Different Types

scholarly journals Comparison of Mechanical Properties of Normal and Fibre Reinforced Concrete (Grade M15)

2019 ◽  
Vol 5 ◽  
pp. 153-164
Author(s):  
Sagar Bista ◽  
Sagar Airee ◽  
Shikshya Dhital ◽  
Srijan Poudel ◽  
Sujan Neupane
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Steel Fibre ◽  
Residential Buildings ◽  
Fibre Reinforced Concrete ◽  
Cement Concrete ◽  
Normal Concrete ◽  
Steel Fibre Reinforced Concrete ◽  
Cracking Control ◽  
Different Types

Concrete is weak in tension, hence some measures must be adopted to overcome this deficiency as well as to enhance physical and other mechanical properties but in more convenient and economical method. Through many research from the past, it has been observed that addition of different types of fibres has been more effective for this purpose. This report presents the work undertaken to study the effect of steel and hay fibre on normal cement concrete of M-15 Grade on the basis of its mechanical properties which include compressive and tensile strength test and slump test as well. Although hay fibres are abundantly available in Nepal, no research have been popularly conducted here regarding the use of hay fibres in concrete and the changes brought by it on concrete’s mechanical properties. Experiments were conducted on concrete cubes and cylinders of standard sizes with addition of various percentages of steel and hay fibres i.e. 0.5%, 1% and 1.5% by weight of cement and results were compared with those of normal cement concrete of M-15 Grade. For each percentage of steel and hay fibre added in concrete, six cubes and six cylinders were tested for their respective mechanical properties at curing periods of 14 and 28 days. The results obtained show us that the optimum content of fibre to be added to M-15 grade of concrete is 0.5% steel fibre for compression and 0.5% hay fibre content for tension by weight of cement. Also, addition of steel and hay fibres enhanced the binding properties, micro cracking control and imparted ductility. In addition to this, two residential buildings were modeled in SAP software, one with normal concrete and other with concrete containing 0.5% steel fibre. Difference in reinforcement requirements in each building was computed from SAP analysis and it was found that 489.736 Kg of reinforcement could be substituted by 158.036 kg of steel fibres and decrease in materials cost of building with 0.5% steel fibre reinforced concrete was found to be Rs. 32,100.

scholarly journals Shrinkage Behaviour of Fibre Reinforced Concrete with Recycled Tyre Polymer Fibres

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Marijana Serdar ◽  
Ana Baričević ◽  
Marija Jelčić Rukavina ◽  
Martina Pezer ◽  
Dubravka Bjegović ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Drying Shrinkage ◽  
Fibre Reinforced Concrete ◽  
Restrained Shrinkage ◽  
Polypropylene Fibres ◽  
Concrete Mixtures ◽  
Shrinkage Behaviour ◽  
Different Types ◽  
Waste Tyre ◽  
Recycled Polymer

Different types of fibres are often used in concrete to prevent microcracking due to shrinkage, and polypropylene fibres are among the most often used ones. If not prevented, microcracks can lead to the development of larger cracks as drying shrinkage occurs, enabling penetration of aggressive substances from the environment and reducing durability of concrete structures. The hypothesis of the present research is that polypropylene fibres, used in concrete for controlling formation of microcracks due to shrinkage, can be replaced with recycled polymer fibres obtained from end-of-life tyres. To test the hypothesis, concrete mixtures containing polypropylene fibres and recycled tyre polymer fibres were prepared and tested. Experimental programme focused on autogenous, free, and restrained shrinkage. It was shown that PP fibres can be substituted with higher amount of recycled tyre polymer fibres obtaining concrete with similar shrinkage behaviour. The results indicate promising possibilities of using recycled tyre polymer fibres in concrete products. At the same time, such applications would contribute to solving the problem of waste tyre disposal.

Strength of hollow circular steel sections filled with fibre-reinforced concrete

2000 ◽  
Vol 27 (2) ◽  
pp. 364-372 ◽  
Author(s):  
Giuseppe Campione ◽  
Sidney Mindess ◽  
Nunzio Scibilia ◽  
Gaetano Zingone
Keyword(s):  
Reinforced Concrete ◽  
Plain Concrete ◽  
Fibre Reinforced Concrete ◽  
Steel Columns ◽  
Different Types ◽  
European Code ◽  
Steel Sections ◽  
Normal Strength ◽  
The Moment ◽  
Standard Tests

The strength of hollow circular steel sections filled with normal-strength plain concrete and fibre-reinforced concrete (FRC) was evaluated. First, the case of centrally loaded composite members was considered and the bearing capacity of the columns was calculated using the methods proposed by a European code (EC4) and an American code (LRDF). Some expressions in these codes were validated for the case of FRC by adapting experimental data to introduce the mechanical properties of the FRC. To do this, experimental results of standard tests on FRC (compression and splitting tension) were used as well as data on circular steel columns filled with 2% FRC by volume with different types of fibres (steel, polyolefin). Second, the moment - axial force diagrams for composite members, taking into account the residual tensile strength of FRC, were calculated, showing the advantages of using FRC compared with plain concrete for filling hollow steel sections.Key words: fibre-reinforced concrete, hollow steel columns, composite members, steel fibres, polyolefin fibres.

Fibre Reinforced Concrete Class Control via Fib Model Code 2010 Approach

2015 ◽  
Vol 1119 ◽  
pp. 672-676
Author(s):  
Vladimir E. Rusanov
Keyword(s):  
Reinforced Concrete ◽  
Synthetic Fibre ◽  
Wide Spectrum ◽  
Basic Research ◽  
Plain Concrete ◽  
Fibre Reinforced Concrete ◽  
New Approach ◽  
Model Code ◽  
Different Types ◽  
Model Code 2010

Fibre reinforced concrete (FRC) has wide spectrum of advantages in tunnelling. Post-cracking behaviour of FRC wasn’t taken into account by Russian engineers while structural design led to underestimation of material abilities. New approach is based on fib Model Code 2010, which provides residual tensile strength Class of FRC. Research Center “FRC” (http://rcfrc.com/) carried out tests with specimens of different types of FRC, which supported by Russian Foundation for Basic Research. Research involved different specimens – plain concrete and FRC with macro-synthetic fibre of different dosage and types. The results showed the efficiency of each type of fibre. The Class of FRC was defined for each specimen series according to results.

Bonding in Cementitious Composites: How Important is it?

1987 ◽  
Vol 114 ◽  
Author(s):  
Sidney Mindess
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Mechanical Behaviour ◽  
Secondary Effect ◽  
Hydrated Cement ◽  
Fibre Reinforced Concrete ◽  
Reinforcing Bars ◽  
Interfacial Bond ◽  
Hydrated Cement Paste ◽  
Different Types

ABSTRACTA number of different types of interfacial bonding occur in concrete, including:i) bonding between various phases (including anhydrous cement) in the hydrated cement paste (hcp) systemii) bonding between cement and aggregatesiii) bonding between cement or mortar and the fibres in fibre-reinforced concrete; andiv) bonding between concrete and steel reinforcing bars or prestressing cables.The importance of these types of bonds with respect to the mechanical behaviour of concrete is discussed. It is concluded that in some systems, the mechanical properties are governed primarily by the interfacial bond; in other systems, however, this bond has only a secondary effect.

scholarly journals Early Age Autogenous Shrinkage of Fibre Reinforced Concrete

2018 ◽  
Vol 59 (1) ◽  
pp. 59-72 ◽  
Author(s):  
Farid Ullah ◽  
Fahim Al-Neshawy ◽  
Jouni Punkki
Keyword(s):  
Reinforced Concrete ◽  
Fresh Concrete ◽  
Autogenous Shrinkage ◽  
Early Age ◽  
Fibre Reinforced Concrete ◽  
Test Setup ◽  
Hardening Process ◽  
Different Types

Abstract Concrete is often sensitive to cracking during the hardening process, and these cracks could be the result of early-age shrinkage. One method to reduce shrinkage is to add different types of fibres to concrete. The aim of this study was to study the effects of different types of fibres on the early-age autogenous shrinkage of concrete. Three different types of fibre materials were used in the research. A “Schleibinger Bending-drain” test setup was used to record early-age autogenous shrinkage of fresh concrete immediately after mixing. The results show that, a fibre dosage of 0.38% by volume was found to be effective in reducing the effects of early-age autogenous shrinkage of concrete.

scholarly journals Functionally Graded Concrete Using Glass Fiber and Flyash

2019 ◽  
pp. 446-450
Author(s):  
Sureshkumar M.P. ◽  
Naveenkumar V ◽  
Thangaprakash R ◽  
Gokul S ◽  
Gunasekaran M.A
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Glass Fiber ◽  
Fibrous Material ◽  
Structural Integrity ◽  
Basalt Fiber ◽  
Functionally Graded ◽  
Fiber Reinforced Concrete ◽  
Fibre Reinforced Concrete ◽  
Different Types

It has been found that different type of fibers added in specific percentage to concrete improves the mechanical properties, durability and serviceability of the structure. Fiber-reinforced concrete (FRC) is concrete containing fibrous material which increases its structural integrity. It contains short discrete fibers that are uniformly distributed and randomly oriented. Different types of Fibre reinforced concrete includes steel fibres, glass fibres, synthetic fibres and natural fibres Basalt fiber is a material made from extremely fine fibers of basalt, which is composed of the minerals plagioclase, pyroxene, and olivine.  

Adding an expansive agent to increase the toughness of steel fibre reinforced concrete

2019 ◽  
Vol 26 (4) ◽  
pp. 197-208
Author(s):  
Leo Gu Li ◽  
Albert Kwok Hung Kwan
Keyword(s):  
Reinforced Concrete ◽  
Steel Fibre ◽  
The Other ◽  
Fibre Reinforced Concrete ◽  
Test Results ◽  
Compressive Properties ◽  
Shrinkage Cracking ◽  
Steel Fibre Reinforced Concrete ◽  
Expansive Agent ◽  
Concrete Matrix

Previous research studies have indicated that using fibres to improve crack resistance and applying expansive agent (EA) to compensate shrinkage are both effective methods to mitigate shrinkage cracking of concrete, and the additions of both fibres and EA can enhance the other performance attributes of concrete. In this study, an EA was added to fibre reinforced concrete (FRC) to produce concrete mixes with various water/binder (W/B) ratios, steel fibre (SF) contents and EA contents for testing of their workability and compressive properties. The test results showed that adding EA would slightly increase the superplasticiser (SP) demand and decrease the compressive strength, Young’s modulus and Poisson’s ratio, but significantly improve the toughness and specific toughness of the steel FRC produced. Such improvement in toughness may be attributed to the pre-stress of the concrete matrix and the confinement effect of the SFs due to the expansion of the concrete and the restraint of the SFs against such expansion.

Sign in / Sign up

Export Citation Format

Share Document