Effect of Polypropylene Fibres on Strength and Plastic Shrinkage of High Volume Fly Ash Self Compacting Concrete

Shriharsha, . and Shetty, Kiran Kumar and Nayak, Gopinath and Aditya, Thimmaiah Gari (2016) Effect of Polypropylene Fibres on Strength and Plastic Shrinkage of High Volume Fly Ash Self Compacting Concrete. In: 2nd International Conference on sustainable energy and built environment, 10/03/2016, VIT University, Vellore, TN, India..

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Abstract

The present paper aims to study the effect of polypropylene fibre on plastic shrinkage and compressive strength of High Volume Fly Ash Self-Compacting Concrete (HVFA_SCC). Methods/Statistical Analysis: Six 150mm cubes and a slab of dimension 560mmx365mmx114mm were casted each for five mixes of HVFA_SCCwith and without polypropylene fibres. The cementitious material (600 kg/m3) and water to powder ratio (0.325) were kept constant. The self-compacting concrete mixes had a cement replacement of 30%, 40%, 50"16,60%, and 70% of class F fly ash. The dosage of polypropylene fibres was 0.1% of total volume of concrete. Findings: Tests were carried out on these mixes to obtain the properties of concrete on its fresh state in terms of viscosity, stability, filling and passing abilities. The compressive strength and plastic shrinkage properties were determined. Slump flow values of the mixes were in the range of 650mm - 800mm, the flow times were ranging from 2 to 4 sec. The HVFA_SCCmixes with polypropylene fibres had developed the twenty eight days compressive strengths ranging from 24.0 MPa to 46.0 MPa. Addition of polypropylene fibres in high volume fly ash self-compacting concrete had not shown any significant effect on the strength parameters but it had improved concrete resistance to plastic shrinkage by reducing sedimentation and bleeding due to increase in cohesion of mix. The control on bleed water resists the migration of the cementitious fines and the sand to the surface. The PFSCC 60 has attained a twenty eight days Compressive strength of 30 MPa. Applications/Improvements: PFSCC60 has consumed only 40% cement by weight of the cementitious material proves to be economical and by reducing the emission of greenhouse gasesfound to be eco-friendly.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: High Volume Fly Ash Self-Compacting Concrete (HVFA_SCC),Polypropylene fibre, Compressive Strength, PlasticShrinkage
Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 16 Jul 2016 11:46
Last Modified: 16 Jul 2016 11:46
URI: http://eprints.manipal.edu/id/eprint/146621

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