Study on Strength Behavior of High Performance Concrete using Industrial Waste and Plastic fibers

Due to rapid industrialization energy demand increases day by day. Energy generation through thermal power plants produce large quantity of coal ashes in which only 40% of that is being utilized in construction field and balance ashes are disposed over lands. Coal ash consists of different ashes, namely, class-F fly ash, class-C fly ash and pond ash. In this research, a study is carried out on concrete using class-f fly ash and pond ash as a partial replacement for cement and fine aggregate, respectively. In addition waste plastic bottles are made into fibers and are used in concrete in volume fraction as 0.5%, 1%, 1.5% and 2%. The specimens are prepared with partial replacements of cement by 30% of class-f fly ash and 10% of silica fume and partial replacement of sand by 20% of pond ash for all specimens. Super plasticizer is added to improve the workability of concrete. The sample specimens consist of concrete cubes, cylinders and prisms. The compressive strength, split tensile strength and flexural strength tests are carried out and the test results are compared with that of conventional concrete. KeywordsClass-f fly ash, pond ash, silica fume, waste plastic fibers, compressive strength, split tensile strength, flexural strength . I.INTRODUCTION The ashes are used in concrete for the purpose of economy, eco friendly and most importantly reduction in cement content and sand content. Cement is a water-based binder used to bind other building materials together. The reason cement is one of the most common construction ingredients among other is its ability to hold the structure together. Sand is a major component of concrete and without the sand, concrete will not function as intended. The properties of a specific concrete mix will be determined by the proportion and type of sand used to formulate the concrete. Sand is a larger component of the mix than cement. Accumulation of ash disposed over lands is dangerous to the environment, and many environmental issues. This is one of the major environmental challenges that the world is facing because of ashes disposed over lands. And most commonly used fine aggregate is river sand in many parts of the world. On one side extraction of river sand in excess leads to environmental impacts and on other side disposal of coal ashes from thermal power plants, leading to many environmental problems. The cement production consumes huge amounts of limestone and clay and production of cement releases large amount of CO2 into the atmosphere. CO2 gas is a major contributor to greenhouse effect. The carbon dioxide emission and green house emission are some challenge to the human society. To eliminate such kind of environmental problem and excess extraction of river sand and for the purpose of eco-friendly, economy most importantly reduction in cement content and sand content the disposed coal ashes are used effectively in the partial replacement for cement and fine aggregate. Among different waste fractions, plastic bottles (PET) are non-biodegradable which create lots of environmental issues. These waste PET bottles are used as a fiber in the concrete for durability and serviceability. A review of literature state that several investigations are previously performed on fly ash concrete. Haldive [1] mentioned that at present India produces around 112 million ton of fly ash annually. Disposal of fly ash and bottom ash is a growing difficulty in India. Huge amount of water is also required for fly ash and bottom ash disposal in slurry form. In this study they found out that at 28 day compressive strength decreased as the fly ash and pond ash content increased. And same for tensile strength when fly ash and pond ash content increased the strength decreased. But for 45 day strength of concrete shows higher strength when compare to 28 day results. Gaurav [2] mentioned that specimens are prepared with the partial replacement of alcoofine, fly ash and pond ash for cement and fine aggregate, respectively. They found higher compressive strength when 4% alcoofine and 26% of fly ash is replaced for cement and 10% pond ash for sand. Similarly higher split tensile strength is achieved when 6% alcoofine and 24% of fly ash is replaced for cement and 10% pond ash for sand. Amudhavalli and Jeena [3] mentioned in their study that the M35 grade concrete specimens of cubes, cylinder and prism are casted with percentage replacement of cement by silica fume by 0, 5, 10, 15 and 20 %. And the results indicate that use of silica fume in concrete has improved the performance of concrete in strength and durability aspects. Ghugal [4] replaced sand with pond ash to the extent of 25% and 50% and the results showed that when 25% of pond ash with sand content gives consistently high compressive strength, flexural strength and split tensile strength. Tariq Junaid. H Graduate Student Structural engineering division, school of mechanical and building sciences, VIT University, Chennai campus, India Helen Santhi. M Professor Structural engineering division, school of mechanical and building sciences, VIT University, Chennai campus, India International Journal of Engineering Research & Technology (IJERT) ISSN: 2278-0181 Published by, www.ijert. org TITCON-2015 Conference Proceedings Volume 3, Issue 16 Special Issue 2015