MS Placing of Bituminous Pavement Revised

7/25/2019 MS Placing of Bituminous Pavement Revised

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Method Statement for Placing of Bituminous Pavement


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REVISION HISTORY

Rev.

No.Date

CONTRACTOR: MAKRevision History ENGINEER

Status of

Arova!"reare# Revie$e# Arove#

% 2016

First Submission

following award ofContract

CONTENTS

&.% S'oe

(.% "urose

).% Resonsi*i!ities

+.% Referen'es

,.% Safety

-.% "ro'e#ures

.% Inse'tion an# Testin/


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&.% S'oe

1.1 This method of statement covers the placing of bituminous pavement areas

shown on approved drawings.

(.% "urose

2.1 This method statement defines the responsibilities and describes the activities

and procedures to be implemented for the placing of bituminous pavement for

the Construction, Completion and aintenance of !oads, "ridges, Storm#ater $rainage, Sewers and %ther Services for !oads Connecting Sabah al

&hmad and 'hiran (ew Towns )!&2*+ ro-ect to compl with the contract

drawings and specification.

).% Resonsi*i!ities

*.1 The Site /ngineer S/ will ensure that the site preparation activities are

conducted according to the approved ethod Statement, and S/ plan.

*.1.1 /nsure all necessar approvals and wor3 permits are obtained prior to

start the wor3.

*.1.2 Conve all technical data to road foreman and to ensure that the

foreman understood the activities to be e4ecuted.

*.1.* &rrange 5 ensure the reuired manpower to e4ecute the wor3.

*.1.7 /nsure safe wor3ing procedures are followed in accordance with the

site safet plan.

*.1.8 repare the necessar !euest for 9nspection !F9:s to arrange the

consultant /ngineer for inspections.

*.1.6 %rgani;e the wor3 in a safe manner to ensure that safet and protective

euipment are properl utili;ed.

*.2 The aterial /ngineer / will ensure that the materials being used are inaccordance with the ro-ect Specifications and approved aterial Submittals.

e will be in charged with the field laborator and will underta3e the


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necessar tests as reuired for the pro-ect with the assistance from


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*.6.6 9nspect 5 ensure that all engaged personnel have got correct / and

all euipment are perfect and certified to e4ecute the wor3s.

+.% Referen'es

7.1 Specifications>

7.1.1 ro-ect $rawings and Specifications.

7.1.2 # @eneral Specifications

7.2 $rawings > $ocument 999 A Bolume *

7.* "%= > "ill (o. 7

,.% Safety

The Site /ngineer and !oad Foreman, in coordination with the Safet %fficer,

shall be ensuring compliance with all safet reuirements during theimplementation of this wor3 which shall include, but not limited to the

following>

8.1 /nsuring all euipment are in good operating condition.

8.2 rovision and proper use of safet paraphernalia.

8.* aintaining cleanliness at wor3 areas.

8.7 roper disposal of e4cess and waste construction materials.

8.8 roviding visible warning signs and?or barricades at wor3 areas when

necessar.

-.% "!ant 0 E1ui2ent

6.1 &sphalt i4ing lant

6.2 Surveing 9nstruments

6.*


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.1.* rior to finali;ation of the Eob i4, a trial section at location approved

b the /ngineer shall be laid for each Eob i4. The trial section shall

be 2 lanes wide b 80 m long.

.1.7 The trial section shall be laid to demonstrate the adeuac of hauling,

spreading and compaction euipment and the suitabilit of the

construction methods and organi;ation proposed and it shall be offered

to the /ngineer for inspection and approval.

.2 rime and Tac3 Coat aterials

.2.1 rime and Tac3 Coat materials shall conform to @S sections 708 and

706, respectivel.

.2.2 &pproval of the material from the /ngineer is reuired prior to use.

.* &sphalt i4ing lant

.*.1 The plant shall be capable to continuall produce asphalt mi4es within

the -ob mi4 tolerances specified at an automaticall controlledoperation.

.*.2 The plant shall be offered to the /ngineer for inspection and approval

prior to an asphalt paving activities.

.7 %ther /uipment

.7.1 &ll other euipment such as haulers, rollers, asphalt distributor,

spreading and finishing euipment shall be offered to the /ngineer for

inspection and approval.

3.% "ro'e#ures

D.1 auling of aterials

D.1.1 Sufficient plant capacit, haul vehicles and storage shall be provided so

that adeuate supplies of mi4ture are delivered to ensure continuous

paving can be achieved.

D.1.2 The dispatching of the hauling vehicles to the -ob site shall be so

scheduled that all material delivered ma be placed in dalight, unless

the /ngineer approves the use of artificial light.

D.1.* $eliver of material shall be at a uniform rate and in an amount well

within the capacit of the paving and compacting euipment.

D.1.7 &ll precautions shall be ta3en to protect the mi4 from the weatherduring transit and whilst waiting to discharge.

D.1.8 The mi4 shall be delivered to the paver at a temperature between 178C

and 168C.

D.2 Surface reparation

D.2.1 /4amine the sub)base?base course and ad-oining construction, and the

conditions under which the bituminous primer will be applied. $o not

proceed with the wor3 until unsatisfactor conditions detrimental to the

proper and timel completion of the wor3 have been corrected.

D.2.2 &ll base and sub)base courses will be cleaned and prepared b removal

of dust and deleterious materials b air -etting or mechanicall

sweeping or an other approved means. & light application of water


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will be made -ust prior to the application of liuid asphalt to facilitate

penetration.

D.2.* rior approval of the surface b the /ngineer is reuired before

application of prime coat.

D.* rime Coat &pplication

D.*.1 rime coat will be applied initiall on a trial section at a location

approved b the /ngineer, using the same materials, mi4ing and

spraing euipment, and construction procedures, proposed for use in

the wor3s.

D.*.2 %nl after approval of the /ngineer on the trial section can the

application of prime coat proceed.

D.*.* rime coat shall be applied with same methods and procedure as that of

the approved trial section.

D.*.7 rime coat shall not be applied when the ambient temperature is less

than 10C nor during rain, fog, dust)storms or other unsuitable weather.D.*.8 The application rate shall be between 0.D and 1.8 3g?m2 at application

temperature between 78C and D0C.

D.*.6 The prime coat shall usuall be applied to 1?* or 1?2 of the road width

at a time. #hen applied in two or more lanes, there shall be a slight

overlap of asphalt material along ad-oining edges of the lanes.

D.*. The completed primed surface shall be maintained in a good clean

condition and prior to the application of the ne4t course, an surface

irregularities shall be corrected and all e4cessive blotter material, dirt

or other ob-ectionable materials shall be removed.

D.7 Tac3 Coat &pplicationD.7.1 Tac3 coat will be applied initiall on a trial section at a location

approved b the /ngineer, using the same materials, mi4ing and

spraing euipment, and construction procedures, proposed for use in

the wor3s.

D.7.2 %nl after approval of the /ngineer on the trial section can the

application of tac3 coat proceed.

D.7.* Tac3 coat shall be applied with same methods and procedure as that of

the approved trial section.

D.7.7 Tac3 coat shall not be applied when the ambient temperature is less

than 10C nor during rain, fog, dust)storms or other unsuitable weather.

D.7.8 The application rate shall be between 0.18 to 0.8 3g?m2 at applicationtemperature between 28C and 68C.

D.7.6 The tac3 coat shall usuall be applied to 1?* or 1?2 of the road width at

a time. #hen applied in two or more lanes, there shall be a slight

overlap of asphalt material along ad-oining edges of the lanes.

D.7. The completed tac3 coated surface shall be maintained in a good clean

condition and prior to the application of the ne4t course, an surface

irregularities shall be corrected and all e4cessive blotter material, dirt

or other ob-ectionable materials shall be removed.

D.8 lacing of "ituminous aterial "ase Course, "inder Course, #earing

Course

D.8.1


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4.% 9nspection and Testing

!euired tests and inspections shall be carried)out as per approved 9nspection

and Test lan 9T and enough time in the dail wor3 program shall be

allocated to permit the performance and chec3ing with the consultant beforeproceeding with an subseuent wor3.

CONTENTS

1.0 Scope of Work

2.0 Definitions

3.0 References

4.0 Subcontractors

5.0 Materials

6.0 Plant & !uip"ent

#.0 Safet$

%.0 Prior cti'ities

(.0 Proce)ure

10.0 Responsibilities

11.0 ttac*"ents


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1. Scope+

1.1 This Method Statement describes the procedures to be followed in the placing of thefollowing asphalt concrete courses:

Bituminous Base Course

Bituminous Binder Course

Bituminous Surface Course

2. Definitions+

2.1 MS: Method Statement

2.2 ITR: Inspection Testing Re!uest

3. Reference

4. Subcontractors+

".1 #one

5. Materials+

$.1

$.2

Mineral aggregates

Bitumen

,,re,ates- bitu"en an) "i )esi,n /ill be sub"itte) for appro'al as per clause 331.21

6. ools & !uip"ents+

%.1

%.2

%.&

%."

%.$

%.%%.'

%.(

%.)

%.1*

%.11

%.12

Sur+e,ing Instruments

-ight ehicles

Tipper Truc/s

0a+er

Steel Rollers

2$ Ton and &$ Ton 0neumatic Tire RollersBitumen spra,er Tan/er

ater Tan/er

lagging Tape3 arning Tape

Tool bo4

0ersonal 0rotecti+e 5!uipment

Thermometer

#. Safet$


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%. Prior cti'ities+

(.1 Submit mi4 design and aggregates for 5ngineer6s appro+al as per clause 777 of the

specifications. The 8ob mi4 shall be made for the Base9 Binder and Surface Courses

respecti+el,.

(.2 0repare calibrated Sur+e,ing e!uipment.

(.& 0repare Testing e!uipment.

(." 0reparation of all safet, procedures.

(.$ #otice in writing to the 5ngineer.

(.% Trial rea of each pa+ement material9 sampling the permanent wor/s will be laid to the

e4tent and at locations to be agreed upon with the 5ngineer as per clause 77.

(.' Compaction methods will be sub8ect to appro+al b, the 5ngineer prior to

commencement of permanent wor/s b, means of demonstrati+e trials as per clause

&&1.2). Tests will be conducted according to Specs and appro+ed compaction

methods will be adopted for the 0ro8ect. n, modification will be sub8ect to the

5ngineer6s appro+al.

(.( Batching 0lant for asphalt production are located in mghra and another one will be

erected on Site to ensure the re!uired capacit, for the 0ro8ect. ll plants will be

calibrated and chec/ed before being put into operation. Regular chec/s will be

carried out as per clause 77.

(.) Bitumen and aggregates shall not be heated to abo+e 1$*;C and 1'*;C

respecti+el,9 and the temperature difference between them at the time of mi4ing

shall not e4ceed 1$;C.

(. Placin, proce)ure+

ll acti+ities carried out will compl, with the Inspection Test 0lan which reflects the testing re!uirements of

the Contract

(.1

Surface Preparation:

a< ll base and sub=base courses will be cleaned and prepared b, remo+al of

dust and deleterious materials b, air 8etting or mechanicall, sweeping or an,

other appro+ed means. The cleaned course will be afterwards lightl, made wet

0rior to the application of the prime coat.

b< n appro+ed priming coat of grade MC%* or other appro+ed will be applied to

non=bituminous sub=base and base la,ers at the rate of 7 to 7. litres per m>


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(.2

(.3

(.4

as per clause 77. Similarl,9 appro+ed bitumen tac/ coat of grade MC %* cut=

bac/ bitumen or SS1? emulsion or other appro+ed will be applied to binder

courses at the rate of *.2$ to *.&$ litre per m> as per clause 7.. Spra,ing of

the prime and tac/ coats will be done b, a tan/er fitted with no@@les at the

bac/ of the tan/ to allow e+en spreading of bitumen. The bitumen will be pre=

heated to a temperature of 12*oC in the tan/er prior to the spra,ing. The

accurac, of rate of application will be ad8usted during the trials.

Note: Enough time will be allowed for the curing of the prime and tack coats

before laying the binder course or the wearing course.

Bituminous pavement material transportation:

a< Transportation of asphalt concrete from the mi4ing plant to the pa+ers will be+ia &* ton tipper truc/s designated for this use onl,. The truc/s +ehicles will be

treated b, oil or water or an, other appro+ed means to facilitate the discharge.

Moreo+er9 the, will be speciall, modified to pre+ent an, spills during the

downloading into the pa+er.

Note: The number of trucks to be used for hauling the asphalt will be sufficient

to avoid any interruption in the paving operation.

b< The flow of deli+er, will be uniform to assure the best !ualit, of asphalt

finishing.

c< ll mi4ed material will be deli+ered to the pa+er in time to permit completion of

spreading and finishing of the mi4ture during the da, wor/ing hours. Should

the bituminous material be placed at night9 ade!uate lighting will be pro+ided

and re!uest for appro+al will be sent to the 5ngineer.

d< Ma4imum care will be ta/en to a+oid deli+er, interruption. ?owe+er9 in case

there is a long stoppage between truc/s9 a 8oint will be cut in the fresh la,er9

loosened material discarded and a +er, light coat of hot bitumen will be applied

before the ne4t strip is placed.

Sur'e$in, /ork

a< Base course9 binder course and wearing course le+els will be determined from

the finished pa+ement surface as shown on the appro+ed shop drawings and

will be submitted for the 5ngineer6s appro+al.

b< The strip width shall not be less than & meters. 0a+er guideline le+els will be

set using steel wires stretched and ade!uatel, supported to pre+ent an,

sagging on both sides.

Placin, of bitu"inous "aterial+

a< Spreading of bituminous mi4tures shall be done b, automatic controlled


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pa+ers. BA pa+ers will be used in this 8ob. The BA pa+ers are e!uipped with

automatic sensors that control the grades and cross slopes. The sensors are

mounted on either side of the pa+ing legs and are indi+iduall, controlled.

Crowns or continuous grades can be established on an BA inisher. ll

machines in+ol+ed in asphalt operation shall be in good condition and will be

chec/ed before and during the operation.

b< The thic/ness of asphalt shall be controlled on both sides b, the ele+ation of

the steel wires. The thic/ness of asphalt laid is determined b, measuring

height from top of wire and b, a measuring gauge a steel rod fitted with a

circular steel plate which can be ad8usted for depth< throughout the la,ing

period. The length of each pass shall not e4ceed a one truc/ load.

c< The material temperature should be more than 12*;C and will be chec/ed

directl, before its discharge according to clause 7. of the specifications.

d< -ongitudinal 8oints in successi+e la,ers shall be offset b, at least &**mm from

parallel 8oints in the la,er beneath. Trans+erse 8oints in successi+e la,ers

and3or ad8acent lanes shall be offset b, at least & meters.

e< The material discharge will ta/e place without dela,. Rolling shall commence

immediatel, after placing of asphalt and will sta, as close as possible to the

0a+er. ?owe+er9 all loose material shall be remo+ed prior to compaction.

f< The pa+er shall operate at a speed which will gi+e the best results

coordinating with the rate of deli+er, of material.

g< Initial rolling shall be carried out with the Steel Roller at speeds slow enough

to a+oid displacement of asphalt.

h< 54cess binder3base course material will be remo+ed b, brooming or light

ra/ing and will be discarded. d8ustment of surface course le+el b, hand=

ra/ing or hand spra,ing will be carried out after getting the 5ngineer6s

appro+al as per clause &&1.2)

i< Rolling shall be longitudinall,9 beginning at low side towards the high side of

pa+ement. d8acent rolls shall be shorter as progressed and finall, semi

diagonal steel rolling is applied.

8< The asphalt shall then be rolled with the 2$ Ton tire Rollers and shall stop short

of an, crac/s that might appear.

/< The high powered &$ Ton 0neumatic Tire Rollers shall then be applied to

achie+e the re!uired compaction.

l< inal rolling shall be done b, the Steel Roller especiall, at 8oints and points of

deficiencies.

m< ll Rollers shall be e!uipped with water reser+oirs and scrapers to a+oid an,


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brea/ing of the asphalt surfaces. The tires of the rollers shall be spra,ed with

oil3diesel to pre+ent an, fine particles from asphalt getting stuc/ to the tires.

n< The smoothness of the course will be chec/ed b, means of & meters

straightedge as per clause &&1.&' and will be measured b, the gap between

bottom of straightedge and pa+ement at an, points and in an, direction.

(.4 Tolerances !lauses"""..#

a< ?ori@ontal lignment

1$mm from Drawings

Rate of de+iation not to e4ceed 1 in 1***

b< ertical lignment

1*mm for base course

%mm for binder course %mm for surface course

c< -a,er Thic/ness

$mm for an, indi+idual la,er

min1*E of combined thic/nessF 1$mm< for combined thic/ness

d< Smoothness

&mm for surface course

1*mm for binder course

10. Responsibilities+

1*.1 The CM will coordinate with S5 and ensure that the necessar, resources to implement

the appro+ed method statement9 Gob and cti+it, ?a@ard nal,sis ha+e been allocated

to the tas/.

1*.2 It is the Site Super+isor6s dut, to organi@e the wor/ in a safe manner to ensure that

safet, and protecti+e e!uipment are being properl, utili@ed. ?e must also assure the

? G? are implemented and the method statement procedure is followed and the

IT0 applied.

1*.& It is the wor/er6s dut, to properl, wear the protecti+e e!uipment pro+ided and obe, allsafet, rules. The, must also perform the wor/ as described in the method statement

procedure.

1*." The S5 will ensure that the site preparation acti+ities are conducted according to the

ppro+ed method statement9 G?9 ? and all in=situ tests as re!uired in the IT0 are

implemented.

1*.$ The M5 will ensure that the materials being used are in accordance with the 0ro8ect

Specifications9 the appro+ed method statement and the IT0.

11. ttac*"ents+

11.1 Gob ?a@ard nal,sis


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11.2

11.&

cti+it, ?a@ard nal,sis

Inspection and Testing 0lan

MS Placing of Bituminous Pavement Revised

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