2021-7-8 AC mixtures by using polypropylene and glass fibers. In a previous comparative study [29], different types of fibers including polypropylene, polyester, nylon and glass were used to reinforce asphalt concrete mixture. The results illustrated that glass fiber reinforced AC and PP fiber ...
Macro synthetic fibres, sometimes known as ‘structural’ synthetic fibres, are made from a blend of polymers and were originally developed to provide an alternative to steel fibres in some applications. Initially they were identified as a potential alternative to steel fibres in sprayed concrete, but increasing research and development ... ...
The necessary fiber content in the first place is determined by the requirements of bending strength and resistance to dynamic loads. The fiber content depends on the composition and consistency of concrete, fiber properties and mixing techniques. The most widespread types of fibers, their advantages and disadvantages, possible areas of their application are considered. ...
Title: Some Developments in Polypropylene Fibers for Concrete Author(s): Antoine E. Naaman, Surendra P. Shah, and James L. Throne Publication: Symposium Paper Volume: 81 Issue: Appears on pages(s): 375-396 Keywords: reinforced fibers; pla asbestos; concretes sticizers bondina; costs: crack flexural strength; g polypropylene fibers ing (fracturing); lass fibers; metal . ...
polypropylene fibers alternative to steel fibers. This research intends to determine the performance of concretes consist of polyester fiber, polypropylene fiber and steel fiber against traditional concrete. For this reason, fresh and hardened concrete properties of the concrete mixtures produced with 0%, 1% and 2% are determined by laboratory ... ...
Designing concrete solutions using polypropylene fibers is our specialty. We are a consulting engineering company aiming for easier and better structural concrete answers. With polypropylene fibers the time of heavy lifts, corrosion, long working hours, and unsafe handling of steel bars is over. ...
2020-10-24 Concrete mix was prepared using same proportion of polypropylene and sisal fiber in the percentage of 0.5%, 1%, 1.5%, 2% and 2.5% for creating the polypropylene and sisal based concrete. Results indicate that compressive strength increases with increase of replacement of polypropylene and ...
2009-12-10 Among the polymer fibers, polypropylene (PP) fibers have attracted most attention due to the outstanding toughness of concrete reinforced with them. 2 Using the concept of hybridization 3,4 with two different fibers incorporated in a common cement matrix, can offer the hybrid composite more attractive engineering properties. ...
2013-5-5 with polypropylene fiber reinforced concrete as that in tensile strength, but the difference that dosage amount for which best result is achieved is 0.25%. There is about 80% increase in flexure strength by adding 0.20% fibers in concrete after which strength starts reducing with further increment in fiber ...
2013-1-13 INTRODUCTION: Polypropylene (PP) is the first stereoregular polymer to have achieved industrial importance. The fiber from Polypropylene were introduced to the textile arena in the 1970s and have become an important member of the rapidly growing family of synthetic fibers.Today Polypropylene enjoys fourth spot behind the “big three” fiber classes, i.e. polyester, nylon and acrylic. ...
2019-11-8 2.6 NEED FOR POLYPROPYLENE FIBERS: Concrete develops micro cracks with curing and these cracks propagate rapidly under applied stress resulting in low tensile strength of concrete. Hence addition of fibers improves the strength of concrete and these problems can be overcome by use of Polypropylene fibers in concrete. ...
The main purpose of this project was to explore the feasibility of using newly developed polypropylene (PP) fibers as reinforcement for portland cement concrete and to compare their reinforcing effectiveness with asbestos, glass and steel fibers. Different fabrication procedures and mortar mixes are described. ...
CHEMICAL TREATMENTS OF POLYPROPYLENE FIBER SURFACES USED IN FIBER REINFORCED CONCRETES. This paper reports the results of an experimental investigation to determine the effects of chemical treatment of polypropylene fibers (PPF) used in reinforced concretes. The control group concrete was designed at 4,000 psi. ...
1997-1-1 Research work on the use of synthetic fibers (primarily polypropylene) as reinforce- ment in concrete includes testing programmes to determine tCasic load-deflection curves in compression and bending,4'5 bonding character- istics,6 resistance to impact loads, 7 torsional resistance,8 durability and performance of sheeting elements9"n and ... ...
This investigation aims to improve some of the mechanical properties of concrete such as compressive strength, flexural strength, and modulus of elasticity, by using different percentages of polypropylene fibers, and also studying the durability of concrete for freeze-thaw cycles. the study shows a small increment in compressive strength due to adding fibers which were 28.3% compared with ... ...
2017-2-16 concrete reinforcement. Polypropylene- The synthetic fibers available in the United States, polypropylene is the most widely used in ready mixed concrete .Polypropylene fibers are hydrophobic, so they don‟t absorb water and have no effect on concrete ...
2021-7-7 Comparative evaluation of virgin and recycled polypropylene fibre reinforced concrete. Construction and Building Materials. 2016, 114:134-141. Chapter 5: In this chapter, ability of various newly developed recycled PP fibres to enhance post-cracking performance of concrete is ascertained. ...
1987-6-1 Concrete Construction Journal, Vol. 28, No. 6, p 468, June 1983. Shah SP, Some developments in polypropylene fibers for concrete. American Concrete Institute Symposium on Fibre Reinforced Concrete, 1984. (7) Bentur A, Bassat B M, Schneider D, Durability of glass fiber reinforced concrete with different alkali-resistant glass fibers, The Amer ... ...
2020-4-1 Polypropylene fiber was first used to reinforce concrete in the 1960s. Polypropylene is a synthetic hydrocarbon polymer, the fiber of which is made using extrusion processes by hot-drawing the material through a die. Polypropylene fibers are produced as continuous mono-filaments, with circular cross section that can be chopped to required ... ...
2008-1-22 The effects of admixed polypropylene (PP) fibers on the drying shrinkage of hardened concrete are presented in this paper. Concrete mixtures made with Ordinary Portland cement (OPC) and OPC/Slag blended cements containing various volume fractions of PP fiber were tested. The results show small but consistently higher drying shrinkages in concretes incorporating PP fibers than that without ... ...
2017-2-16 The purpose of this study was to determine the effect of steel/polypropylene hybrid fibers on the mechanical properties and microstructure of ultra-high-performance concrete (UHPC). Tests were carried out on UHPC without and with fibers (steel and/or polypropylene in amounts of 0.25–1%). In this study, granite or granodiorite coarse aggregate with a grain size of about 2/8 mm was employed ... ...
polypropylene fibers (measured by fibers volume in concrete volume). Detail of mixes proportion for this research can be found in Table 1. Table 1. Mix proportion Material Volume Fraction of Polypropylene Fibers 0.0% 0.05% 0.1% 0.15% Polypropylene fibers (kg/m 3) 0.00 0.45 0.90 1.35 Water (lt/m 3) 212.00 212.00 212.00 212.00 ...
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