SUMMER TRAINING AT Ultratech RMC

SUBMITTED BY:Abhimanyu Saraswat

Truck washing

entry

Weighing area

quality store ticket

Yamuna sand/red

sand

20 mm

10 mm

hoppermixer

T.M repair

silo

silo

silo

pump

truck

LAYOUT OF THE PLANT

MAIN THINGS DONE IN SUMMARY TRAINING

TESTING

1) SLUMP TEST2) SLIT TEST3) BULK DENSITY

WORKING OF A RMC PLANT

DESIGN MIX OF CONCRETE

EQUPIMENTS OF MOST IMPORTANT TESTS

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

WORKING PROCEDURE

FLOW CHART IN RMC

PROCESS IN PICTURES

STORAGE OF 10 MM AND 20 MM

PUTTING AGGREGATES/SAND IN HOPPER

BY CONVEYOUR BELT TO SKIP

SKIP TO MIXER

MIXER

CONTROL PANEL

READY TO MOVE

POURING OF CONCRTE IN PUMP AT SITE

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

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

CONTD ….

Step 4: Calculate cement content, Aggregate contents,

10001*)*

)1(1(

ScCa

pScCWV

10001*)*1(

SfFa

pScCWV

LAB CONCRETE MIXER

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.