Evaluating Mechanical Properties of Concrete by Adding Polypropylene Fibers. (original) (raw)

Effects of Polypropylene Fiber Content on Strength and Workability Properties of Concrete

Polytechnic Journal

Low tensile strength of plain concrete is due to the inherent presence of microcracks due to drying shrinkage occurrences or other causes of volume changes in concrete. The addition of a proper amount of fibers to concrete would act as crack arrester thus improves its static or dynamic properties. In this paper, the concrete with different amount of polypropylene fiber was investigating to find out the fibers effect on its fresh and mature properties. A plain concrete mix (reference mix) prepared for comparison purposes. Nine concrete mixes were prepared with different fiber volume fraction (FVF) ranging from 0.06% to 2.16%. It has been found out that the fiber content of the concrete mix will increase compressive, splitting, and flexural strengths of the concrete at the age of 28 days. The strengths increased and reached their maximum value at a corresponding (FVF) of about 0.36%. In comparison with the reference mix, the increase in the maximum compressive strength was about 18%, ...

Effect of Polypropylene Fiber on Properties of Concrete

Plain concrete has low tensile strength, less ductility, destructive and brittle failure. In order to improve these properties of plain concrete, an attempt has been made to study the effect of addition polypropylene fiber in ordinary portland cement concrete. In the this experimental investigation fibers in different percentage 0 to 0.7% has been studied for the effect on strength properties of concrete by carrying compressive strength test and flexural strength test at 28 days for M25 grade of concrete. Test results show that the addition of polypropylene fiber to concrete exhibit better performance than the plain concrete. The results have shown improvement in compressive strength and flexural strength with the addition of polypropylene fiber in ordinary portland cement concrete The fiber content is vary from 0.1%, 0.3%, 0.5% and 0.7% by weight of concrete.

Experimental study on the mechanical properties of concrete with polypropylene fiber

Concrete is the most widely used material in construction today. It is strong in compression but weak in tension and also has a brittle character. In this context, the results of experiments about the application of polypropylene fiber in various weight proportions (1% to 3%) have been explained. Based on the test results, it can be concluded that the addition of 1% of polypropylene fibers can significantly promote the compressive and split tensile strength of concrete

Influence of Polypropylene Fibres on Concrete Properties

IOSR Journal of Mechanical and Civil Engineering, 2016

This paper deals with the influence of addition of various proportions of polypropylene fibres on the properties of fresh and hardened concrete. The objective of this study is to find optimum percentage of Polypropylene fibre content between 0.1% and 0.5% by volume of concrete. An experimental program was carried out to explore its effects on fresh and hardened concrete properties. The slump test was conducted for fresh properties of concrete, also concrete specimens were tested at different age level for mechanical properties of concrete, namely, compressive strength, split tensile strength, flexural strength and modulus of elasticity. The results showed that the workability of concrete decreased with the addition of polypropylene fibres. Results also showed a reduction in modulus of elasticity after 28 day when compared to the reference concrete i.e. without fibre. An increase in flexural strength at 0.5% percentage of polypropylene fibre reinforced concrete was observed when compared to the reference concrete. Also a marked increase in splitting tensile strength was observed for all fibre percentages at 28 day.

Effect of Polypropylene Fiber Reinforced on Properties of Concrete

This paper investigates on analyzing the effects of use of Polypropylene fiber in the mechanical properties of concrete. One of the main tasks of the construction industry is to increase the strength and reliability of structures while reducing construction costs. Effective use of fiber reinforced concrete is likely to lead to reduction in reinforcement. Three mixes used polypropylene fiber with content 1.0%, 1.5%, and 2.0% percent. To provide a basis for comparison, reference specimens were cast without polypropylene fiber. The test results showed that the increase of mechanical properties (compressive strength) resulting from added of polypropylene fiber was relatively high.

Improvement of compressive and tensile strengths of concrete using polypropylene fibers

2015

The most common problems appears on concrete are manifested by tearing, cracking, corrosion and spalling, which will lead to do some defect in concrete then in the whole construction, The fundamental objective of this research was to provide information about the hardened properties of concrete achieved by using easily available local raw materials in Jordan to support the practical work with partners in assessing the practicability of the mixes with polypropylene, and to facilitate the introduction of polypropylene fiber concrete (PFC) technology into general construction practice. Investigate the effect of the polypropylene fibers in PCC mixtures and on materials properties such as compressive strength, and tensile strength. Also to investigate the use of polypropylene fibers in plain cubes and cylindrical concrete to improve it's compressive and tensile strengths to reduce early cracking and inhibit later crack growth. Increasing the hardness of concrete in this research is t...

Influence of Polypropylene Fiber on Strength of Concrete

The present day world is witnessing the construction of very challenging and difficult civil engineering structures. Quite often, concrete being the most important and widely used material is called upon to possess very high strength and sufficient workability properties. Researchers all over the world are attempting to develop high performance concretes by using fibers and other admixtures in concrete up to certain proportions. Hence, in this paper was interested in finding out the optimum quantity of polypropylene fibers required to achieve the maximum compressive strength for M25 grade concrete. From the exhaustive and extensive experimental work it was found that with increase in polypropylene fiber content in concrete there was a tremendous increase in compressive strength. Even at 2 % polypropylene fiber content compressive strength of 28 N/mm 2 was observed against compressive strength 25 N/mm 2 at 0 % hence increase of 12 % compressive strength was obtained.

The mechanical properties of polypropylene fiber reinforced concrete

Journal of Wuhan University of Technology-Mater. Sci. Ed., 2004

The compressive, shear strengths and abrasion-erosion resistance as well as flexural properties of two polypropylene fiber reinforced concretes and the comparison with a steel fiber reinforced concrete were reported. The exprimental results show that a low content of polypropylene fiber (0.91 kg/m 3 of concrete) slightly decreases the compressive and shear strengths, and appreciably increased the flexural strength, but obviously enhances the toughness index and j~aeture energy for the coTwrete with the same mix proportion, consequently it plays a role of anti-cracking and improving toughness in concrete. Morecner, the polypropylenc mesh fiber is better than the polypropylene monofilament fiber in improving flexural strength and toughness of concrete, but the two types of polypropylenc fibers are inferior to steel fiber. All the polypropylene and steel fibers have no great beneficial effect on the abrasion-erosion resistance of concrete.

Utilizing Polypropylene Fibers to Improving Concrete

The use of polypropylene fiber to reinforce the mechanical properties of concrete & cement products is an effective method. In this research, the effect of polypropylene (PP) fiber with different weight percent and length on the physical and mechanical properties of concrete is studied. The test result shows that with adding of PP fiber to concrete, plastic shrinkage is properly decreased. The increase of aspect ratio (L/D) of PP fibers improves the capability of fibers to reduce cracks. In addition, the use of the certain amount of PP fibers in concrete mixture leads to intensifying of some mechanical properties and durability parameters while the other mechanical properties of concrete remain almost unchanged.

Experimental Strength on Polypropylen Fiber Reinforced Concrete

International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022

The paper presents research work of experimental investigation on polypropylene fiber reinforced concrete by replacing river sand to artificial sand with and without admixture. Use of fiber reinforce polymer in civil engineering increase rapidly. Various type of fiber is used such as glass, carbon, steel, asbestos, polyester and polypropylene. The various experimental investigations for determination of properties of polypropylene fiber are discussed in paper work. This paper presents the effect of polypropylene (PP) fibers on various properties of concrete such as compressive strength, tensile strength, workability, and fracture properties with various content of fiber(0% ,0.5%,1.0%,1.5%). The result of this present investigation indicates that by adding of 0.5% of polypropylene fiber shows maximum compressive and tensile strength.