RMC Plant and its components, Testing and Design Mix

Summer Internship in Ultratech Concrete

1. SUMMER TRAINING AT U ltratech RMC SUBMITTED BY: Abhimanyu Saraswat

2. Truck washing entry Weighing area quality store ticket Yamuna sand/red sand 20 mm 10 mm hopper mixer T.M repair silo silo silo pump truck Layout of the plant

3. MAIN THINGS DONE IN SUMMARY TRAINING TESTING 1) SLUMP TEST 2) SLIT TEST 3) BULK DENSITY WORKING OF A RMC PLANT DESIGN MIX OF CONCRETE

4. EQUPIMENTS OF MOST IMPORTANT TESTS

5. TOTAL TEST DONE Sieve analysis Air entrainment meter Consistency (normal, initial and final)- not done Fly ash content Specfic gravity of fine & coarse aggregates Aggregate impact test Speedy moisture test Flakiness and elongation

6. Working procedure

7. FLOW CHART IN RMC

8. PROCESS IN PICTURES

9. STORAGE OF 10 MM AND 20 MM

10. PUTTING AGGREGATES/SAND IN HOPPER

11. BY CONVEYOUR BELT TO SKIP

12. SKIP TO MIXER

13. MIXER

14. CONTROL PANEL

15. READY TO MOVE

16. Pouring of concrte in pump at site

17. Design mix by IS 10262 and 456 Step 1: f m=f ck+ 1.65σ. Step 2 : selection of w/c from curves . Step 3: Estimate water content & sand contents for concrete grades up to M35 up M35/ above M35 w/c curve Steps of design

18. Step 3 adjustment in water and sand content Condition Adjustment Sand zone 1,3 and 4 (for 2 no change) No change in water content but sand -1.5% for zone 3, 1.5 % for zone 1 -3% for zone 4 Increase / decrease of Compaction factor by 0.1 Water content increased by +_ 3% No change in sand w/c ratio increased or decreased by 0.05 No change in water content but +_ 1% in sand content For round aggregates -15kg/m3 for water and -7% for sand

19. Contd …. Step 4: Calculate cement content, Aggregate contents,

20. LAB CONCRETE MIXER

21. PROBLEMS EXPERIENCED   Some sites are just too far away.   Generation of road traffic.   Concrete's limited time span between mixing and going-off means that ready-mix should be placed within 10 minutes of batching at the plant.    Slump loss is also a major issue in RMC which result in a loss to company as the buyer tends to reject the product.