IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 05 Issue: 03 | Mar-2016, Available @ http://www.ijret.org 124 EXPERIMENTAL STUDY ON PARTIAL REPALCEMENT OF FINE AGGREGATE WITH CONSTRUCTION DEBRIS S.Jayakumar 1 , S.Nivedita 2 , T.Vedasangavai 3 1 Professor and Head, Department of Civil Engineering, Sri Manakula Vinayagar Engineering College, Puducherry - 605107 2,3 IV Year Student, Department of Civil Engineering, Sri Manakula Vinayagar Engineering College, Puducherry- 605 107 Abstract The construction industry has gained very fast growth in recent decades due to the increase in population, increase in industrialization and also introduction of new infrastructure projects. These resulted in the growth of construction industry drastically, which leads to a huge demand for construction materials and also in generation of huge amount of construction waste. The present work aims at finding the optimum concrete mixture encompassing of cement mortar and brick bat debris as a substitute for fine aggregate. Also the basic properties of cement mortar debris and brick bat debris as fine aggregate was studied and it is compared with the traditional fine aggregate. The effect of cement mortar debris and brickbat debris as fine aggregate in concrete for different proportions on strength was recorded at the curing age of 7, 14 and 28 days. All the data are tabulated andcompared. It was observed that particular proportions of cement mortar debris and brickbat debris displayed enhancing effect onthe compressive strength. Keywords: Construction Waste, Debris, Compressive Strength --------------------------------------------------------------------***---------------------------------------------------------------------- 1. INTRODUCTION Building materials accounts for about half of all materials used and about half the solid waste generated worldwide. Due to the increase in the economic growth after development and redevelopment projects in the country and subsequent increase in the urbanization in the cities has made construction sector to grow drastically on one side and on other side construction and demolition waste poses a great environmental impact due to increase in urban solid waste management. Construction and demolition waste is generated upto 25% annually in India. Out of it waste generation during construction alone is upto 60 kg per m 2 [1]. The major constituent of conventional concrete is sand which has become scarce and highly expensive. Hence the need for an alternative for the river sand has become a major concern for all. Moreover the surplus excavation of sand from river bed creates a major threat to the environment. The water head in the river bed decreases which results in lower ground water level due to digging of river sand. It also erodes the nearby land due to excess sand excavation and as well as it destroys the flora and fauna in nearby areas [2]. The present study aims at developing an optimum concrete mixture with cement mortar debris and brick bat debris as substitute to fine aggregate that can be used for building construction. 2. PROJECT DEVELPOMENT Figure 1, illustrates the development of the project .In this study, the researcher collected pieces of uncontaminated cement mortar debris and brick bat debris from construction site. These pieces of debris were crushed manually using hammer and graded as per the IS code 383 for fine aggregate, which is 100% passing in sieve 4.75mm. Using the sieved aggregate, various test and experiments such as specific gravity, water absorption, sieve analysis as per IS 2386(PART I) were conducted. The graded crushed cement mortar debris, brick bat debris and river sand were mixed with water and cement with 1:1.5:3 ratios of cement to crushed cement mortar debris, brick bat debris and river sand to coarse aggregate. The river sand is replaced about 50% with different proportions of cement mortar debris and brick bat debris. For each proportion 100mm cube specimens for 7 th , 14 th and 28 th day of curing were tested for compression test. A conventional concrete was also tested in the same manner. The results were evaluated to examine which proportion of cement mortar debris and brick bat debris can be used [3][4].