CAPÍTULO 3. MODELO DE SISTEMA
3.5 Conclusiones
MoRT&H Specifications
Roed WOIb: 5-Basesand SurfaceCoune (Bituminous)
Description Unit Quantity
b) Machinery
Mechanicalbroom hour 6.00
Air compressor 250 cfm hour 6.00
Mobile sluny seal equipment hour 6.00 Front end loader 1 cumbucket capacity hour 6.00 Tipper 5.5 cum cap3city for carriage of hour 6.00 aggregate from stockpile on road side to
sluny equipment. bitumenemulsion and fillei'
Pneumatic tyred ronerwith individual hour 6.00 wheel load not exceeding 1.5 tonne
Water tanker 6 KL capacity hour 2.00
c) Material
Residual Binder @ 11 per cent of mix 80 tonne x2.2xO.11
Fine aggregate4.75mm and belOw87 per cum cent of total mix, 80 x 2.2 x 0.87
=
153.12tonne. Taking density 1.5
=
153.12/1.5=
102.08 cumF"dler@2 per cent of total mix= tonne 80 x 2.2 x 0.02
Cost of water KL
19.36 102.0&
3.52 12.00 d) Overhead charges @ % on (a+b+c)
e) Contractor's proflt@ % on (a+b+c+d) Cost for 16000 sqm = a+b+c+d+e
Rate per sqm
=
(a+b+c+d+e)l16000 Case -II : 3 mm thicknessUnit = sqm
Taking output = 20000 sqm (60 cum)
154
• •
• •
,..'
•. !i(~
C"
c;
C'
o o o
o o
o o
f'
(' ('
o
Reference
to
MoRT&H Specifications
Road Works: S-Bases and Surface Course (Bituminous)
Description Unit Quantity Rate
Rs.
a) Labour
Mate day 0,20
Mazdoor day 5.00
b) Machinery
Mechanicalbroom hour 6.00
Aircompressor250cfm hour 6.00
Mobile sluny seal equipment hour 6.00 Front end loader 1 cum bUcketcapacity hour 6.00 TIpper 5.5 cum Clipacityfor carriage of hour 6,00
ag~atefrom stockpile on road side to sluny equipment, bitumen emulsion and filler
Water ·tankerllKL capacity hour 2.00
c) Materlal
Residual Binder@ 13 per cent of miX
= .
60x2.2xO.13·
Fine ",ggregate 3 mm and below 85 per cent of1otal mix 60 x 2.2 x 0.85
=
112.2tonne, Taking density 1.5 Filler @ 2 per cent of total mix = 60 x 2.2 x 0.02
Costofwater
d) Ovemeadcharges @ % on (a+b+c) e) Contractor's profit @ % on (a+b+c+d)
Cost for 20000 sqrn
=
a+b+c+d+e Rate per sqm=
(a+b+c+d+e)l20000 Case • iii : 1.5 mm thicknessUnit
=
sqmTaking output = 24000 sqm (36 cum)
155
tonne 17.16
cum 74.80
,~
tonne 2.64
KL 12.00
Road Works: S-Bascs ond SurfaceCOWIe (Bituminous)
Sr. Reference to Description Unit Quantity . Rate
No. MoRT&H Rs.,<
Specifications
a) Labour
Mate day 0.20
Mazdoor day 5.00
b) Machinery
Mechanical broom hour 6.00
Air compressor 250 cfm hour 6.00
Mobile slurry seal equipment hour 6.00 Front end loader 1 cum bucket capacity' hour 6.00 Tipper 5.5 cum capacity for carriage of . hour 6.00 aggregate from stockpile on road side to
slurry equipment, bitumen emulsion and filler
Water lanker 6 KL capacity hour 2.00 . c) Material
Residual Binder @ 16 per-cent of mix tonne 12.87 36 x 2.2 x 0.16
Fine aggregate 2.36 mm and below. 82 cum 43.30 per cent of tolal mix 36 x 2.2 x 0.82
=
64.94 tonne. Taking density 1.5
Filler @ 2 per cent of total mix
=
tonne 1.58 36 x 2.2 x 0.02Cost of water KL 12.00
d) Overhead charges @ % on (a+btc) e) Contractor's profit @ % on (a+b+c+d) Cost for 24000 sqm
=
a+b+c+d+eRate per. sqm
=
(a+b+c+d+e)J24000 Note: Tack coat, if required to be provided. beforelaying slurry seal may be measured and paid separately
156
• •
, •
Road Works: 5-Bases and Surfaco Comse (Bituminous)
Reference to Description Unlt rQuantity Rate
MoRT&H R$;
specifications
517 Recycling of Bituminous Pavement with Central Recycling Plant
Recycling. pavement by cold mil6ng of existing bi~minous layers, planning the surface after cold miIHng,reclaiming excavated material to the extent of 30 per. cent of the required quantity, haunngand slockpiting the reclaimed material near the central recycling plant after carrying out necessary checks and evaluation, adding fresh materia,!including rEljuvenalors as required, mixing In a hot mix plant, transporting and laying at site and:compacting to the required grade, level and thk;kness, all
as specified in Clause 517 ..
Unit
=
cumTaking output
=
120 cum (276 tonne) a) LabourMate day 0.48
Mazdoor day 10.00
Mazdoor skilled day 2.00
b) Machinery
Cold milling machine @.20cumperhour hour 6.00 Mechanical broom@ 12.50sqm per hour hour 1.28
Air compressor 250 cfm hour 1.28
Bitumen pressure distributor@ 1750 sqm hour 0.91 per hour
Hot mix plant 100-1;10 TPH producing an hour 3.00 average of 75 tonne per hour
Electric generator set 250 K:V A hour 3.00 Front end loader 1.00 cum bUcket capacity hour 3.00
Tipper 5.5 cum capacity hour 18.00
Smooth wheeled roller 8-10 tonne hour 3.00 )( 0.65-Vibratory roller 8 tonne hour 3.00 )( 0.65-Smooth wheeled tandem roRer8-8 tonne hour 3.00 )(
0.65-157
RoodWOlb: 5-_ and SurfilceCourse(BibDDinous)
1.99
Sr. Reference to Description Unit ,Quantity . Rate
No. MoRT&H Rs.
Specifications
c) Material i) Bitumen
A bitumen content is 4.5 per cent by 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 tonne, 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 "
0.60" 0.04 = 1;99
Bitumen required for fresh mixof 193.2 tonnes = 193.2 " 0.04 = 7.73
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 tonne/cum, total volume of aggregate = 123.65 bum . Size Wise requirement of fresh aggregates 37.5 - 25 mm @23 per cent
25 -10 mm@ 15 percent 10 - 5mm @20percent Below 5 mm @ 40 per cent Filler (cement) @ 2 per cent = 5.52 tonne of 276 tonne
d) Overhead charges @ %on (a+b+c) e) Contractor's pro6t @ %on (a+b+c+d) Cost for 120 cum of OBM = a+b+c+d+e Rate per sqm • (a+b+c+d+e)l120
158
tonne
tonne
cum cum cum cum tonne
7.73
28.44 18.55 24.73 49.46 5.52
• •
I •
sr.
No.
5.17.
Reference to MoRT&H Specifications
Note:
518
Road Works: 5-Bases and Surface Course (Bituminous)
Description
•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-qcling plant. To cater for theiridling time, these have been multiplied with a factor of 0.65.
Fog Spray
Providing and applying low viscosity .biturnen emulsion for sealing cracks less than 3 mm wide or incipient fretting or disintegration In an existing bituminous surfacin9.
Unit
=
sqmTaking output
=
10500sqma) Labour Mate Mazdoor
b) Machinery
Mechanical broom @1250 sqm per hour' Air compressor 250 cfrn
Bitumen emulsion pressure distributor
@1750 sqmper hour c) Material
Bitumen emulsion @0.75 kg persqm d) Overhead charges @ Ok on(a+b+c) e) Contractor's profit@ % on (a+b+c+d) Cost for 10500 sqm
=
a+b+c+d+eRate per sqm •• (a+b+c+d+e)l10500
159
Unit Quantity Rate
Rs.
day
day
hour hour tonne
tonne
0.12
3.00 ;..
6.00 6.00 6.00
7.88
Road Works: S-Bues and SUrface Course (Bituminous)
Sr. Reference to Description Unit Quantity Rate
No. MoRT&H Rs;
Specifications
In case it is decided by the Engineer to blind the fog spray, the following may be added : a) Labour
Mate day 0.16
Mazdoorfor pre-coatingof grit day 4.00 b) Material
Crushed stone grit 3 mm size @ 3.75 kg cum 26.25 per sqm .
Bitumen emulsion for prll-'COatinggrit tonne 0.79
@ 2 per cent of grit, 39.38 x 0.02 5.18. 519 Bituminous Cold.Mix (Including Gravel
Emulsion)
Providing,layingand roUingof.bituminOuScold mix on pfepared base consistingof a mixture of unheatedmineralaggregateand emulsified or cutbackbitumen,includingmixingirIa piant of suitable type and capacity, transporting, laying, compacting and finishing to specified grades and levels.
Unit
=
cumTaking output = 205 cum (450tonne) Case -I: Using bitumen emulsion and 9.5 mm or 13.2 mm nominal size aggregate
Composition of mix (450tonne) is assumed to be as under:
Bitumen Emulsion . Filler
Totalaggregates
8 percent 2 percent 90 percent
By weight of total mix
160
• •
• •
Road Wod<s: 5-Bases and Surface Course (Bituminous)
Sr. Reference to . DescriptIon Unit Quantity ~at1l.
No. MoRT&H
RS;
Specifications
Proportion of aggreg~tes
19 mm to 9.5 mm 25'percent
9.5 mmt06 mm 29 percent
6 mm to 0.075 mm 36 percent ,a) Labour
Mate day 0.84
Mazdoor day 16.00
Mazdoor skilled day 5,00
.
b) . Machinery
Drum mix plant for cold mixes of hoUr 6.00 approprlateeapacitY but noUess.th.an
75 tonnelhoUr
Ele<!lricgenerator~ 125IWA hoUr 6.00 Front end loader 1CUl1\buciet cllpacity hoUr 6.00
Tipper 10tonnecapacily l.km 450
xi.
Add 10 per cent of cost of carriage to etNer ,', cost of loading and unloading
f
Paver finisher hoUr 6.00
Pneumaticlyredroller 12-15 tonne hoUr 6.00 ••0.65·
Smooth wheeled steel tandem roller6-8 hoUr 6.00" 0.65·
tonne c) Material
Bitumen emulsion @ 8 per cent tonne 36.00 Filler (lime) @ 2 per cent tonne 9.00 Aggregates size 19 to 9.5 mm - cum 75.00 450 x 0.25 x 1/1.5 .
Aggregates size 9.5 to 6 mm - cum 87.00 450 x 0.29 x 1/1.5
Aggregates size 6 to 0.075 mm - cum 108.00 450 x 0.36 x 1/1.5
d) Overhead charges @ % on (a+b+c)
161
Road Wodcs: 5-Bases •••• SurlilceCouno (BitumiDous) ,
Sr. R.f.rence to Description Unit Quantity Rate
No. MoRT&H , Rs.
Specifications
e) Contractor's profit@ % on (a+b+C+d) Cost for 205 cum
=
a+b+c+d+eRate per cum
=
(a+b+c+d+e)l205 (Applicable to CasesItoIV)Note: 1. Density of aggregateshas beenassumed 1.5gmfcc
2. Tack coatwhere PIQVidedwiI bemeasured and paid separately.
*3. Though thef08elsare mquiredontyfor,s;S hours each
as
per norms of outpul,but these are required to be available at site for6 .hOursas the drum mix plant and the paver would,take 6 hours for mixing and paving. To cater for the idle period,their usage rates have been muJtipfiedby a factor of 0.65.Case - II : Using .bitumenemulslonand 19 mm or 26.5 mm nominal size aggregate Composition of mlx{450 tonne)is assumed to be as under:
Bitumen EmulsiQ/1 Filler
Total aggregates
8 percent 2 percent 90 percent Proportion of aggregates
37.5 rT)mto 19 mm 19mmt06mm 6 mm to 0.075 mm
25 percent '30percent 35 percent
162
• •
• •
Reference to MoRT&H Sp!lciflcations
Road Works: 5-Bases 8IIlISurface Course (Bituminous)
Description
. a) Labour
Mate day
M~~ d~
Mazdoor skilled ~