HOMOLOGACIÓN Y ADAPTACIÓN DEL PRODUCTO

5.16 517 Recycling of Bituminous Pavement with Central

Recycling Plant

Recycling pavement by cold milling of existing bituminous layers, planning the surface after cold milling, reclaiming excavated material to the extent of 30 per cent of the required quantity, hauling and stock piling the reclaimed material near the central recycling plant after carrying out necessary checks and evaluation, adding fresh material including rejuvenators as required, mixing in a hot mix plant, transporting and laying at site and compacting to the required grade, level and thickness, all as specified in clause 517.

Unit = cum

Taking output = 120 cum (276 tonnes) a) Labour

Mate day 0.480 input #VALUE! L-12

Mazdoor day 10.000 input #VALUE! L-13

Mazdoor skilled day 2.000 input #VALUE! L-15

b) Machinery

Cold milling machine @ 20 cum per hour hour 6.000 input #VALUE! P&M-069 Mechanical broom @ 1250 sqm per hour hour 1.280 input #VALUE! P&M-031 Air compressor 250 cfm hour 1.280 input #VALUE! P&M-001 Bitumen pressure distributor @ 1750 sqm per hour hour 0.910 input #VALUE! P&M-004 Hot mix plant 100-120 TPH producing an average of

75 tonnes per hour

hour 3.000 input #VALUE! P&M-021 Electric generator set 250 KVA hour 3.000 input #VALUE! P&M-081 Front end loader 1.00 cum bucket capacity hour 3.000 input #VALUE! P&M-017 Tipper 5.5 cum capacity hour 18.000 input #VALUE! P&M-048 Smooth wheeled roller 8-10 tonnes hour 3.00x0.65* input #VALUE! P&M-044 Vibratory roller 8 tonnes hour 3.00x0.65* input #VALUE! P&M-059 Smooth wheeled tandem roller 6-8 tonnes hour 3.00x0.65* input #VALUE! P&M-045

c) Material i) Bitumen

A bitumen content is 4.5 per cent bitumen weight of mix. For reclaimed material, fresh bitumen will be required to the extent of 60 per cent of normal requirement.

In a mix of 276 tonnes, 82.8 tonne is reclaimed and balance 193.2 tonne is fresh mix.

Bitumen required for reclaimed mix of 82.8 tonne @ 60 per cent = 82.8 x 0.60 x0.04 = 1.99

tonne 1.987 input #VALUE! M-074 Bitumen required for fresh mix of 193.2 tonnes = 193.2

x 0.04 = 7.73

tonne 7.728 input #VALUE! M-074

ii) Aggregates

Percentage of mix requiring fresh aggregates - 70 per cent Weight of fresh mix = 276 x 0.70 = 193.2 tonne

Weight of fresh aggregate in the mix = 193.2 x 0.96 = 185.47 tonne

Taking average density of 1.5 tonnes/cum, total volume of aggregate = 123.65 cum.

Size wise requirement of fresh aggregates

Spec. Input ref.

25 - 10 mm @ 15 per cent cum 18.550 input #VALUE! M-046 10- 5 mm @ 20 per cent cum 24.730 input #VALUE! M-040 Below 5 mm @40 per cent cum 49.460 input #VALUE! M-030 Filler (cement) @ 2 per cent = 5.52tonnes of 276

tonne

tonne 5.520 input #VALUE! M-081

d) Overhead charges @ input on (a+b+c) #VALUE!

e) Contractor's profit @ input on (a+b+c+d) #VALUE!

Cost for 120 cum of DBM = a+b+c+d+e #VALUE!

Rate per cum = (a+b+c+d+e)/120 #VALUE!

say #VALUE!

Note Although the total rolling time is only 4 hours as per norms, all the three rollers have to be available at site for 3 hours each to match with the output of re-cycling plant. To cater for their idling time, these have been multiplied with a factor of 0.65.

5.17 518 Fog Spray

Providing and applying low viscosity bitumen emulsion for sealing cracks less than 3 mm wide or incipient fretting or disintegration in an existing bituminous surfacing.

Unit = sqm

Taking output = 10500 sqm a) Labour

Mate day 0.120 input #VALUE! L-12

Mazdoor day 3.000 input #VALUE! L-13

b) Machinery

Mechanical broom @ 1250 sqm per hour hour 6.000 input #VALUE! P&M-031 Air compressor 250 cfm hour 6.000 input #VALUE! P&M-001 Bitumen emulsion pressure distributor @ 1750 sqm

per hour

tonne 6.000 input #VALUE! P&M-004

c) Material

Bitumen emulsion @ 0.75 kg per sqm tonne 7.880 input #VALUE! M-077

d) Overhead charges @ input on (a+b+c) #VALUE!

e) Contractor's profit @ input on (a+b+c+d) #VALUE!

Cost for 10500 sqm = a+b+c+d+e #VALUE!

Rate per sqm = (a+b+c+d+e)/10500 #VALUE!

say #VALUE!

1.In case it is decided by the engineer to blind the fog spray, the following may be added

a) Labour

Mate day 0.160 input #VALUE! L-12

Mazdoor for precoating of grit day 4.000 input #VALUE! L-13

b) Material

Crushed stone grit 3 mm size @ 3.75 kg per sqm cum 26.250 input #VALUE! M-024 Bitumen emulsion for precoating grit @ 2 per cent of

grit,39.38 x 0.02

tonne 0.790 input #VALUE! M-077 #VALUE! #VALUE!

say #VALUE!

5.18 519 Bituminous Cold Mix ( Including Gravel Emulsion)

Providing, laying and rolling of bituminous cold mix on prepared base consisting of a mixture of unheated mineral aggregate and emulsified or cutback bitumen, including mixing in a plant of suitable type and capacity, transporting, laying, compacting and finishing to specified grades and levels.

Unit = cum

Taking output = 205 cum (450 tonne)

(i) Using bitumen emulsion and 9.5 mm or 13.2 mm size aggregate

Composition of mix (450 tonne) is assumed to be as under:-

Bitumen Emulsion 8 per cent By weight of total mix

Spec. Input ref.

Filler2 per cent

Total aggregates 90 per cent

Proportion of aggregates

19 mm to 9.5 mm25 per cent 9.5 mm to 6 mm29 per cent 6 mm to 0.075 mm 36 per cent

a) Labour

Mate day 0.840 input #VALUE! L-12

Mazdoor day 16.000 input #VALUE! L-13

Mazdoor skilled day 5.000 input #VALUE! L-15

b) Machinery

Drum mix plant for cold mixes of appropriate capacity but not less than 75 tonnes/hour.

hour 6.000 input #VALUE! P&M-077 Electric generator 125 KVA hour 6.000 input #VALUE! P&M-018 Front end loader 1 cum bucket capacity hour 6.000 input #VALUE! P&M-017 Tipper 10 tonne capacity tonne.km 450 x L input #VALUE!Lead =input

km & P&M- 058 Add 10 per cent of cost of carriage to cover cost of loading

and unloading

#VALUE! Paver finisher hour 6.000 input #VALUE! P&M-034 Pneumatic tyred roller 12-15 tonnes hour 6.00x0.65* input #VALUE! P&M-037 Smooth wheeled steel tandem roller 6-8 tonnes hour 6.00x0.65* input #VALUE! P&M-045

c) Material

Bitumen emulsion @ 8 per cent tonne 36.000 input #VALUE! M-077 Filler (lime)@ 2 per cent tonne 9.000 input #VALUE! M-188 Aggregates size 19 to 9.5 mm - 450 x 0.25 x 1/1.5 cum 75.000 input #VALUE! M-045 Aggregates size 9.5 to 6 mm - 450 x 0.29 x 1/1.5 cum 87.000 input #VALUE! M-040 Aggregates size 6 to 0.075 mm - 450 x 0.36 x 1/1.5 cum 108.000 input #VALUE! M-030

d) Overhead charges @ input on (a+b+c) #VALUE!

e) Contractor's profit @ input on (a+b+c+d) #VALUE!

Cost for 205 cum = a+b+c+d+e #VALUE!

Rate per cum = (a+b+c+d+e)/205 #VALUE!

say #VALUE!

(Applicable to cases I to IV)

Note 1.Density of aggregates has been assumed 1.5 gms/cc