FIRST READY MIXED CONCRETE DELIVERED TO A CONSTRUCTION SITE IN 1913 IN BALTIMORE ,USA '

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• READY MIX CONCRETE - (HISTORY)

• FIRST READY MIXED CONCRETE DELIVERED TO A
  CONSTRUCTION SITE IN 1913 IN BALTIMORE ,USA .
• FIRST SPECIFICATIONS FOR RMC WAS PUBLISHED IN
  1933
• NOW THE ESTIMATED PRODUCTION IN USA IS 200
  MILLION CU.MT/ANUM
• IN DEVELOPED COUNTRIES USA/JAPAN APPROX. 70
  CEMENT PRODUCED IS CONSUMED BY RMC INDUSTRY

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READY MIX CONCRETE - IN INDIA

• Is 4926 -2003defines RMC as
• CONCRETE DELIVERED AT THE SITE OR INTO THE
  PURCHASERS VECHICLE IN THE PLASTIC CONDITION AND
  REQUIRING NO FURTHER TREATMENT BEFORE BEING
  PLACED IN A POSITION IN WHICH IT IS TO BE SET
  HARDENED.
• CURRENTLY APPROX
  6 MILLION CU.MT OF RMC IS BEING USED PER
  ANNUM IN INDIA

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CUSTOMER PROFILE
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INDIVIDUAL HOUSING
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INFRASTRUCTURE PROJECT
(MRTS CHENNAI) (ELEVATED PORTION)
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COMMERCIAL BUILDING
(HITECH CITY HYDERABAD)

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DETAILS OF CONCRETE SUPPLIED TIDEL PARK
CHENNAI
SALIENT FEATURES Total Quantity
1,12,328 Cum Controlled Concrete
9,730 Cum Largest single pour
1,736 Cum Maxm Quantity/Month 10,800
Cum Maxm Quantity/Day 812 Cum
Maxm Height Pumped 56 Mtrs Time
Period Construction 12 Months PLANT
DEPLOYED Batching
Plants 30 Cum/Hr 1 No. .
56 Cum/Hr. 1 No.
Concrete Pumps 38 Cum/Hr 2 Nos.

46 Cum/Hr 2 Nos
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RMC HIGH
RISE STRUCTURES

• SOUTHCITY PROJECT
• HEIGHT 65Mtrs GRADE M30
  STRUREWATERTANK CEMENT 380Kgs/Cum W/C
  Ratio 0.48 SLUMP 150mm RATE
  10Cum/Hr

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SITE MIX Vs. READY MIX
Traditional Method Site mix concrete.
(Creates Road blocks)
(Inconsistent Quality)
Modern Method Ready mixed Concrete
(Off Site Mixing) (No Site Pollution)
(Consistent Quality)
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ADVANTAGES OVER SITE MIX CONCRETE

• MECHANICAL PRODUCTION WITH COMPUTERISED CONTROLS
  FOR BATCHING
• CONSISTENT BETTER QUALITY/LESSWASTE
• ELIMINATES NEED TO STORE MATERIALS
  FOR CONCRETE AT PROJECT SITES
  HENCE LESS SPACE
• EXPEDITIOUS SUPPLY FACILITATES FASTER PLACING
  RESULTING IN CRASHING SCHEDULES
• DRASTIC REDUCTION IN LABOR REQUIRED AT PROJECT
  SITES FOR PRODUCTION PLACING

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SPEED
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SPEED NORMAL RATE OF POUR
3 CU.M/Hr AVERAGE RATE OF POUR USING
LT Concrete (RMC)
15 Cu.M/Hr MAXIMUM
CONCRETE POURED
IN A DAY (24HRS.)FROM A RMC PLANT
CHENNAI BYE PASS PROJECT 484 CU.M
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SOPHISTICATION
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SOPHISTICATION CEMENT
PUMPED STORED IN
SILOS BATCHING COMPUTERISED
WEIGH BATCHING OF CONCRETE TRANSPORTATION
CONCRETE DELIVERED IN TRANSIT MIXERS
(6cu.m) TO PROJECT SITE,DISTANCES OF
30KM. PLACING/PUMPING
UPTO A HEIGHT OF 28 MTRS.
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TRANSPORTING CONCRETE

• CONCRETE IN TRANSIT RETARDERS, PASTICISERS ,
  SUPERPLASTICISERS ARE USED IN PRE DETERMINED
  DOSES AS ADMIXTURES TO KEEP CONCRETE IN PLASTIC
  STATE IN TRANSIT.
• GENERALLY TRANSIT TIME OF 2 HRS TIME PERIODS IS
  CATERED FOR. PLANT EQUIPMENT
  GENARALLY TRANSIT MIXERS OF CAPACITY 6 Cum. A
  FLEET OF 6 TO 8 MIXERS .

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PLACING THE CONCRETE AT PROJECT SITE (CONCRETING
OF FOUNDATIONS FOR BRIDGE PORUR)
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PLACING OF CONCRETE

• PUMPING CONCRETE
• CEMENT CONTENT OR CEMENTISIOUS MATERIALS (THE
  WEIGHT CEMENT PLUS FINE AGG OVER 300MICRON.) IN
  THE RANGE OF 290KG/Cum.
• SLUMP IN THE RANGE 75mm. 1.758 FREE WATER
  CONTENT
• NOMINAL AGG SIZE NOT EXCEEDING 1/5th PIPE DIA.
  
• PLANT EQUIPMENTS STATIONERY LINE PUMPS, MOBILE
  BOOM PLACERS. CAPACITIES OF 60/90Cum/Hr

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PLACING OF CONCRETE CONCRETING THE KERB WALL
SITE MIX CONCRETE
READY MIX CONCRETE
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CONCRETING USING LINE PUMP
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SPREADING / VIBRATING / FINISHING CONCRETE
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STANDARDISATION
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STANDARDISATION SOURCING OF MATERIALS FROM
STANDARD PREDETERMINED SOURCES PUSH
BUTTON CONTROLS TO RECALL MIX TO ANY DESIRED
(100 NOS.) PRE DESIGNED MIX PROPORTIONS CAN BE
FED STORED IN THE CONTROL PANEL OF THE BATCHING
PLANT . REGULAR PREDETERMINED QA/QC CHECKS ON ALL
MATERIALS PRIOR TO USE. REGULAR STRUCTURED
ATTENTION TO FEEDBACK FROM CUSTOMERS ON SERVICES
RENDERED.
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COMPUTERISED CONTROL PANELS
COMPACT BATCHING CONTROLS
MICROPROCESSOR PROCESS CONTROL
SYSTEMS
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QA / QC POLICY
CEMENT (4031/4032)
FINENESS,SETTING TIME, IST,FST,COMP.STRENGTH,
LOSS ON IGNITION , INSOLUBLE RESIDUE
C.AGG (383 / 2386) SIEVE ANALYSIS, SPECIFIC
GRAVITY, CRUSHING STRENGTH, IMPACT / ABRASION
VALUE
F.AGG. (383 / 2386) SIEVE ANALYSIS,
SPECIFIC GRAVITY, CHLORIDE CONTENT, Ph
VALUE, ORGANIC IMPURITIES.
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QA / QC POLICY
WATER (3025)
ORGANIC,INORGANIC, SULPHATE (AS so4),
CHLORIDES(AS cl), SUSPENDED MATTER,
NEUTRALISATION ( Na oh/ Hcl ) Ph VALUE
ADMIXTURES
(8142, 1199 , 6925 .)

INITIAL SETTING TIME, WORKABILITY, CHLORIDE
CONTENT, SULPHATE CONTENT.
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Engineered Concrete
20mm Aggregate 12mm Aggregate Fine Aggregate
Cement Water Paste Mineral
Admixtures
COHESIVE CONCRETE Homogenous Concrete. Excess
water can cause Segregation leading to defective
concrete.
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Engineered Concrete

• WORKABILITY OF CONCRETE
• Determined by the slump test.
• Denoted in mm.
• Depends on water cement ratio.
• W/C ratio inverse proportion to concrete
  strength.
• Compensate by use of chemical admixtures.
  (Plasticisers,
  SuperPlasticisers.)
• Retention of slump or workability.
  (Retarder Plasticisers)

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Engineered Concrete

• IMPERMEABILITY OF CONCRETE
• Concrete is generally porous.
• Use of Mineral additives in Cement/Concrete to
  increase the density of concrete.
• Ingress of oxides into concrete enhances the
  chances for corrosion of steel.
• This leads to spalling of concrete.
• Concrete is engineered to have less permeability
  thus reduce deterioration of concrete.

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SAND Zone 1-50, Zone 2-45, Zone
3-40. Judicious Mix Durability requirements
IS456, wear tear pump,
Delayed setting due to high dosage of Admixture,

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Engineered Concrete
HIGH PERFORMANCE CONCRETE Use of mineral
chemical admixtures to increase the performance
of concrete incorporate in design.
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HIGH STRENGTH CONCRETE
HIGH GRADE M75 for M/S Afcons / M/s Dar
Consultants. PUNE
FLYOVER CHENNAI

FLYOVER CHENNAI GRADE M55
CEMENT 510Kgs/Cum.
W/C Ratio 0.33
ADMIXTURE
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SUPERPLASTICISER
FLYOVER PUNE GRADE M75
CEMENT 425Kgs/Cum.
Flyash 75Kgs
Micro Silica 38Kgs
W/C Ratio 0.29
ADMIXTURE
SUPERPLASTICISER/RETARDER.
Location PUNE, Client M/S
Afcons. Consultants M/s Dar Consultants
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SELF COMPACTING CONCRETE
DMRC PROJECT (M-35 GRADE)
SCC CONCRETE
Commercial Production
DMRC 8000 cu.m

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RMC LONG
HAULAGES

• BANGALORE/CHICBALAPUR
• DISTANCE 108Kms GRADE
  M20 CEMENT 350
  Kg/Cum INIT DOSAGE
  0.40 REDOSAGE 0.20
  TRANSIT TIME 3Hrs RATE OF POUR
  8 Cum/Hr ADMIXTURE SUPERPLASTICISER TRANSPRT
  RS.1600/Cum

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RMC ZERO
SLUMP CONCRETE
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FUTURE SCENARIO

• MATERIALS
  LIGHT WEIGHT
  AGGREGATES (PELLETISED SLAG, NATURAL PUMICE)
  
  HEAVY WEIGHT AGGTS (MAGNETITE,STEELSHOTS)
  CEMENTIOUS MATLS ( PFA,GGBS, SILICA FUMES)
• TYPES OF CONCRETE
  FOAM CONCRETE FOR LAND
  REINSTATEMENT. SELF COMPACTING CONCRETE,
  SELF CURING
  CONCRETE,
  FIBRE REINFORCED CONCRETE(STEEL,GLASS
  FIBRE, POLYPROPYLENE FIBRES) FOR WHITE TOPPING OF
  ROADS.

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FUTURE SCENARIO

• APPLICATIONS
  USAGE BY ALL
  SEGMENTS OF CONCRETE USERS. USE FOR FILLING.
  
  USE OF RETARDERS TO PUT CONCRETE TO
  SLEEP REACTIVATE AFTER PRESPECIFIED TIME
  PERIODS. RECYCLING OF SURPLUS CONCRETE.
• TYPES OF CONTRACTS
  SINGLE POINT DIRECT PURCHASE ORDERS
  BY CLIENTS FOR MAJOR PROJECTS.
  (RS.125 CRORES. ORDER FOR DMRC PROJECT)
  
  SPECIFICATIONS FOR
  MANDATORY USE OF RMC.
  
  TRANSACTIONS BY E.COMMERCE.

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