Effect of Treated Recycled Aggregate on the Mechanical Properties of Polypropylene Fibre Reinforced Concrete
Nazrin Nazar1, A. Nizad2
1Nazrin Nazar, PG Scholar, Department of Civil Engineering, TKM College of Engineering, Kollam (Kerala), India.
2A. Nizad, Professor, Department of Civil Engineering, TKM College of Engineering, Kollam (Kerala), India.
Manuscript received on 13 April 2017 | Revised Manuscript received on 20 April 2017 | Manuscript Published on 30 April 2017 | PP: 66-71 | Volume-6 Issue-4, April 2017 | Retrieval Number: D4914046417/17©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The non-availability of materials is one of the major factors affecting the progress of construction. Natural resources are becoming insufficient to meet the increasing demand in construction. As a solution to the above problems, recycled aggregates from the demolished waste are now being used as replacement of natural aggregates. But the use of recycled aggregates drastically decreases the strength of concrete. This is mainly due to old mortar on the surface of aggregate which render the surface porous and makes it of inferior quality. Recent literatures suggests surface treatment to improve the strength. Therefore in this study, recycled aggregate that is treated in dil. HCl to remove the loose mortar is used instead of recycled aggregate. Also fibre reinforced concrete is now being widely used in industry due to its abrasion resistance, shrinkage control and impact resistance. The objective of this study is to find out the combined effect of treated recycled aggregate with polypropylene fibres and the strength properties are compared with that of conventional concrete. Mix proportion is done for M25 concrete. Natural coarse aggregate is replaced by treated recycled coarse aggregate in proportions of 0, 20, 40, 60, 80 and 100%. In all mixes the proportion of polypropylene fibre is kept constant at 0.2% by volume of concrete. From the test results it is inferred that the use of concrete, containing up to 60% replacement of natural coarse aggregate with treated recycled coarse aggregate can be economically and judiciously encouraged for structural applications.
Keywords: Fibre Reinforced Concrete, Polypropylene Fibre, Recycled Aggregate, Treated Recycled Aggregate.
Scope of the Article: Concrete Engineering