STUDY OF POLYETHYLENE TEREPHTALATE PET BOTTES AS FIBRE IN CONCRETE WITH PARTIAL REPLACEMENT OF CEMENT WITH SILICA
Authors: M. Rajalakshmi, D. Karthikeyan, S. Vijayalakshmi, R. Pradeep, A. Meenakshi
DOI: 10.87349/JBUPT/27505
Page No: 36-46
Abstract
Concrete is the most widely used man made material in construction industry and now we are making jungles of concrete in replacement of the natural habitat. There is no doubt it is most useful thing in construction industry but it has a negative impact also, just like a coin has two faces. Raw materials used in manufacturing of concrete affects the environment in one or the another negative way. Like manufacturing of cement produce carbon dioxide whereas the production of aggregates adds dust to the environment. Production of coarse aggregates also impact the geology of the area from they were extracted. So now the researchers in the field of Civil Engineering are moving their interest towards the use of materials that can cause least harm to the environment. A step taken in this direction is the use of waste products along with or in replacement of cement. Many of these materials are already in use, like silica fume, fly ash etc. Along with it many other materials are being added to concrete to improve its properties. Some of the materials are fibrous in nature and form a micro level reinforcement to improve the properties of concrete that mainly includes its strengths. In this study, plastic is used as fiber in concrete. Plastic from the polyethylene terephthalate PET plastic bottles was firstly shredded into small pieces in form of fiber. It was then mixed with concrete containing silica fume in partial replacement of cement by 15%. Fiber was added in proportion of 0,2.5, 5, 7.5 and 10% by weight of cement without any replacement. Results shows improvement in strengths upto 5% and optimum quantity was concluded at 5% addition of plastic fiber.
