International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 04 | Apr 2023
p-ISSN: 2395-0072
www.irjet.net
Effect Of Polydisperse Cementitious Polymer Based Waterproof Coated Steel Fibers And Polypropylene Fibers In Concrete Sajeev K.1, Chithira Krishnakumar2, 1M.Tech Student , Strutural Engineering , Universal Engineering College , Thrissur , Kerala , India
2Assistant Professor , Civil Engineering Department , Universal Engineering College , Thrissur , Kerala , India
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Abstract - Civil engineers are facing much problems
1. Improve Compressive Strength
regarding the quality of structures and also relating to the age prolongation of the structures with direct affects of natural calamities. To overcome above impacts as well as making the structure more stronger in every points, hybrid fiber addition along with the concrete can be introduced. The combination of hybrid fibers with concrete will provide immense physical and mechanical properties. Furthermore, corrosion resistance against the chemical attack , water seepage problems etc can be subdued by making a cementitious waterproof shield cover over the steel fibres. This experimental study comprises the effect of Hybrid fibres i.e. poly-disperse cementitious polymer based waterproof coated steel fibers and polypropylene fibre on M30 grade concrete. The percentage of hybrid fibre added is limited to 1% of volume of concrete, where variation in percentage of steel and polypropylene fibre is made for the study in this 1% . More over Steel fibres are given Styrene Butadiene Rubber (SBR) coating, which provides a massive protection boosting up the energy absorption capacity of the structure. The mechanical properties such as compressive strength, Split tensile strength and flexural strength are studied to obtain the effects of SBR Coated hybrid fibres on performance of concrete
2. Better result on split tensile and flexural strengths Waterproof coated steel fiber reinforcement made of resistance against acid and alkali attacks. When such concrete was used in that type of sensitive portions, mixing waterproof coated steel fiber and polypropylene fiber (polydisperse) with cementitious composites, are capable of self strengthening before failure under a bending load. The hardened stage of concrete acts as plastic same stage of work in the loaded material. Such concrete, exhibits work hardening with fracture being accompanied by a suspended brittle effects. The use of Polypropylene fiber (PPF) in practice :
Portion on continuous wetting
Storage tanks
Underground structures with multiscale variational loads and directions
Where age prolongation is needed
Key Words: (Hybrid Fibers, Waterproof coating , Styrene Butadiene Rubber(SBR), Mechanical Properties
2.MATERIALS
1.INTRODUCTION
2.1 Fiber reinforced concrete
The development of promising and most efficient concrete mix with improved performance and durability is an important of modern constructions. Modified cement concrete with hybrid fiber reinforcement is increasingly used in all structural works. The quality of concrete in the construction sector decreased due to various factors and civil engineers are facing much problems regarding the quality and age prolongation of the structures with direct affects of natural calamities. Inaddition to boost up the resistance of the infrastructures against bending, stretching and impact shock loads, polydisperse fiber with different specifications and proportions is used in construction practice.
Fiber - reinforced concrete is usually Portland cement concrete mixed with either metallic or polymer fibers or both. The strength of the fiber reinforced concrete is often determined by the strength of the interfacial transition zone (ITZ). An increase in the strength of the cement paste also causes an increase in the adhesion at the fiber matrix interface.
2.2 Steel fiber (SF) - hooked end It is made by milling from rolled steel. It is a steel strip of regular round shape in cross section. Due to its high density and easy corrosion, steel fibers (SFs) are not suitable for light weight aggregate concrete and concrete in a high chloride environment.
Poly disperse cementitious polymer based waterproof coated steel fibers and polypropylene fibers in concrete have the following advantages :
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