364598424-306866725-CIVIL-PROJECT-PPT-RECYCLED-AGGREGATE-CONCRETE-pptx.pptx

RECYCLED-AGGREGATE-CONCRETE-

1. RECYCLED AGGREGATE CONCRETE IN RIGID PAVEMENTS PROJECT BY : HITESH BHOI KAILASH KUMAR GUPTA MD JUNAID NOSHIN PRAVEEN SHARMA GUIDE: H.D. ASHWINI

2. CONTENT INTRODUCTION BACKGROUND OBJECTIVES ADVANTAGES DISADVANTAGES LITERATURE REVIEW METHODOLOGY DESIGN AND ANALYSIS TESTING CONCLUSION

3. INTRODUCTION  To achieve sustainable issue in construction area, researchers and companies focus on using waste concrete as a new construction material. It is called recycled aggregate which can be produced by concrete crusher. The aggregates are categorized by size as coarse and fine aggregate. The characteristic of recycled aggregates could be different by its parent concrete because the parent concrete was designed for its purposes such as permeability, durability and high strength concrete.

4. HISTORICAL BACKGROUND The applications of recycled aggregate in the construction areas are wide and they had been used long time ago. Wilmot and Vorobieff (1997) stated that recycled aggregate have been used in the road industry for the last 100 years in Australia. They also stated that the use of recycled aggregate for the construction and rehabilitation of local government roads has a great improve in the last five years C & D Recycling Industry (n.d.), the fact file stated that from the time of the Romans, the stones from the previous roads were reused when rebuilding their vaunted set of roads. It also stated that since the end of World War II, the recycling industry had been well established in Europe. According to Seecharan (2004), the Detroid News stated that in 1980s, the old concrete crushed into a powder was a popular road builder at Michigan, USA

5. OBJECTIVES To find out the % use feasible for construction To reduce the impact of waste materials on environment To carry out different tests on recycled aggregates & natural aggregates and compare their results To find out the ways of cost saving such as transportation costs, excavation costs, etc.

6. ADVANTAGES Cost saving There are no detrimental effects on concrete & it is expected that the increase in the cost of cement could be offset by the lower cost of Recycled Concrete Aggregate (RCA). Save environment There is no excavation of natural resources & less transportation. Less land is required. Less emission of carbon due to less crushing. Save time There is no waiting for material availability. Job opportunity Creates employment opportunities and economic activities in recycling industries

7. DISADVANTAGES Less quality (e.g. compressive strength reduces by 10-30%). Duration of procurement of materials may affect life cycle of project. Land, special equipments & machineries are required ( more cost ). Very high water absorption (up to 6%). It has higher drying shrinkage & creep .

8. LITERATURE REVIEW The applications of recycled aggregate in the construction area are very wide. There are many testing based on the recycled aggregate have been carried out all around the world. Hanson and Torben (1986) stated that since 1945, the research on recycled aggregate had been carried out in many countries. Some of the literature reviews on recycled aggregate are shown as below.

9. METHODOLOGY

10. Concrete It is crushed, the reinforcement bar is removed, and the material is screened for size. Market outlets for recycled concrete include road base, general fill, pavement aggregate, and drainage media.

11. DESIGN & ANALYSIS MIX PROPORTIONING The mix proportioning was done as per the Indian standards ( IS 10262:2009) . The cement used is of single origin Portland Pozzolana type with specific gravity 2.6 . AGGREGATE : Recycled aggregates comprises of crushed, graded inorganic particles processed from construction and demolition concrete debris . These materials were obtained from a pavement.

12. TESTING SHAPE TEST : as per IS:2386(part I)-1963 Elongation Index test Flakiness Index test Combined Index test Angularity number test AGGREGATE CRUSHING VALUE as per IS 2386(part IV) 1963 AGGREGATE IMPACT VALUE as per IS 2386(part IV)1963 LOS ANGELES ABRASION as per IS 2386(part IV)1963 WATER ABSORPTION TEST as per IS 2386(part IV)1963 COMPRESSIVE STRENGTH TEST as per IS Code SPLIT TENSILE TEST as per IS Code FLEXURAL STRENGTH TEST as per IS Code

13. CONCLUSION & EXPECTED RESULTS Various tests conducted on recycled aggregates and results compared with natural aggregates are satisfactory as per IS 2386 Due to use of recycled aggregate in construction, energy & cost of transportation of natural resources & excavation is significantly saved. Hence directly reduces the impact of waste material on environment. ER: Achieving the maximum strength at 40% replacement.

14. THE CHOICE IS YOURS TO LANDFILL TO RECYCLE

15. THANK YOU