Performance of Polypropylene Fibre Reinforced Concrete (original) (raw)
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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.
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%, ...
International Journal of Scientific Research in Science, Engineering and Technology, 2019
The paper deals with the effects of addition of various proportions of polypropylene fiber on the properties of high strength concrete m20 mixes. An experimental program was carried out to explore its effects on compressive strength under different curing condition. the main aim of the investigation program is to study the effect of polypropylene fiber mix by varying content such as 0%, 0. 5%, 1%, 1. 5%, 2% and find the optimum polypropylene fiber content. the concrete specimen were tested at different age level for mechanical properties of concrete name compressive strength of the concrete. a detailed study was carried out of curing conditions. the increase were compressive strength
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...
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.
Evaluating Mechanical Properties of Concrete by Adding Polypropylene Fibers.
2020
This research deals with the effect of Polypropylene Fibers on the properties of concrete. Polypropylene fibers are synthetic fibers which possess high tensile strength, high modulus of elasticity and also good bonding when added to concrete. In this research work, Polypropylene fibers of two different length 6mm and 12 mm were added to concrete in different proportions and then the performance of concrete in terms of strength and cracks propagation were analyzed. For this purpose, three batches of FRC (Fiber reinforced concrete) and one batch of PC (Plan concrete) were made. PC (Plan concrete) sample was used a bench mark with which the other FRC concrete composite were compare in terms of strength and performance. FRC-1 concrete composite contained 50% 6mm length of Polypropylene fibers and 50% 12mm length of Polypropylene fibers. FRC-2 concrete composite had 75% 6mm length of Polypropylene fibers and 25% 12mm length of Polypropylene fibers. Similarly, FRC-3 Concrete contained 25% 6mm length of Polypropylene fibers and 75% 12mm length of Polypropylene fibers. Large number of samples were prepared in laboratory and tests were carried out at the curing age of 28 days. Several laboratory tests were done on the concrete samples such as compression test, split tensile test, modulus of rupture and pure shear test. After analyzing the data from laboratory tests and experiments, it was evident that the performance of concrete in term of strength and cracking behavior were improved after the adding of Polypropylene fibers.
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.
To Study the Properties of Polypropylene Fibers on Fresh & Hardened Stage of Concrete
The fundamental problem with concrete is that it tends to crack due to reduction in volume. This main problem can be solved with polypropylene fiber valuable additives for the concrete world. Since polypropylene fibers can be premixed in a conventional manner, the concept of polypropylene fiber concrete has added an extra dimension to concrete construction. These concrete additives are fibers which increase strain capacity in the critical green stage of concrete. In other word polypropylene fiber provides crack control & removes the cause of weaknesses & improves the compressive strength of concrete. In nominal lengths of 6, 12 or 20 mm, polypropylene fiber is the ideal additive for concrete mixtures in order to reduce plastic shrinkage, cracking and improve the surface properties of the concrete. A concrete mix has been designed to achieve the minimum grade of M25.The investigations on concrete contain two phases. In the first phase, to identify the effects on workability due to the addition of fibers and the in second phase mechanical strength tests on standard specimens such as compressive strength & Tensile Strength will conduct on the fibrous concrete specimens to obtain the optimum volume fraction and length of fibers. After developing the software we had used it and we come to know that it is simple in operating and gives the results in short period of time. Also we had compared the final results of manual method (IS CODE METHOD) and that of software (MIX DESIGNER) we noticed that values are at most same.Workability reduces at higher dosage of fibres compared to initial dosage used. Due to more addition of fibres, there is increase in amount of entrapped air voids due to presence of fibres and therefore increase in air content attributes in reducing workability and difficulty is observed in compaction of mixes. Compressive strength of material increases with increasing fibre content. And PRFC with 12mm cut length having dosage of 1.5% give the strength increment of 40%. Strength enhancement ranges from 12% to 40% for PFRC.Strength enhancement in splitting tensile strength due to polypropylene fibre addition varies from 5% to 23%. Split tensile strength at 28 days is approximately 50% higher than 7 day's strength.
Effects of polypropylene fibre on the compressive and splitting tensile strength of concrete
2018
Concrete is a versatile construction material comprising of cement, aggregates, water and occasionally admixture. It is very good in compression and weak in tension. To complement for the deficiency in the tensile zone; cracks, reinforcements (steel, fibre, etc.) have been found suitable. A good example of fibre is polypropylene. A concrete grade (M20) was batched and synthetic fibre (polypropylene) was used. Two categories of concrete specimens; with and without propylene fibre. The fibre was introduced in varying percentages (0.2%, 0.4%, and 0.6%) by weight of concrete. The compressive strength of concrete containing 0.4% polypropylene fibre at 28 days has the highest value of 32.22N/mm 2 as compared to 30.22N/mm 2 , 30.49N/mm 2 and 30.39N/mm 2 for 0%, 0.2%, and 0.6% respectively. The splitting tensile strength at 7 days increases from 6.176 N/mm 2 to 8.386 N/mm 2 as the percentage of fibre increases from 0% to 0.4%.
From industrial point of view, recently a great attention has been paid to the use of additives such as steel and polypropylene fibers in concrete and cement products. Investigations have revealed that the addition of steel and polypropylene fibers into normal concrete impart significant improvement in controlling its surface cracking, increase their tensile and flexural strength and durability. Considering the advantages of these additives, high strength concrete samples were produced with different mix design as well as using cement replacement materials such as silica fume according to a well-established experimental set up. The tests show that mixed use of steel and polypropylene fibers give good results in terms of improving structural characteristics of the concrete material developed. In all samples, the surface cracking was decreased significantly by adding suitable fibers in terms of sort, diameter, and length. However, the use of 1 kg polypropylene and 78 kg steel fibers in 1 cubic meter concrete was proposed as optimum mix design, regarding the improvement of compressive, tensile and flexural strength of concrete as well as scientific and practical points of view. So that, these newly developed structural concrete reveals promising potentials for further research and development as well as an structurally important building block material.