double seal surface treatment - method statement
TRANSCRIPT
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7/29/2019 Double Seal Surface Treatment - Method Statement
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SUMMARY OF CONTENTS
1. Scope of Works32. Reference Documents.33. Materials34. Plant and labour .........35. Construction46. Hazards and Risks5
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1. Scope of Works
This method statement describes the operations required to undertake the
double seal surface treatment on primed GCS base on newly constructed
shoulders. The seal is done in two separate operations.
2. Reference Documents
General Specifications for Road and Bridge Works Republic of Uganda Volume 3A Section 4200 and 4300 Special conditions of Contract Tender Dossier Volume 4 Section 4200
and 4300
Quality Control Plan: 110.199/QCP/0053. Materials
MC3000 cutback bitumen complying with specification BS 3690 Approved surface dressing chippings, nominal sized 10/14 and 6/10
4. Plant and Labour
Binder Distributor, calibrated and approved. Roads authoritycertificate valid for 12 months.
Mechanical broom Front End Loader Rear Mounted, on tipper trucks, chip spreaders, checked and set to
application rates of aggregate being applied.
Tipper Trucks
Farm Type Tractor and Trailer Surfacing foreman Labour Hand Tools(hard brooms shovels)
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5. Construction
Confirm primed base on shoulder approved for surfacing Ensure traffic control measures in position and correct Check survey, setting out, demarcate are to be sealed Clean and prepare area to remove all loose material or dust before
first application of seal.
Set out edge lines for binder distributor and chip spreaders to follow Obtain approval and confirm application rates for MC3000 and 10/14
aggregate from Engineers representative.
Dip distributor, record quantity and temperature of binder in vehicle Position binder distributor, chip spreaders, roller Distributor sprays closely followed by chip spreader pneumatic roller
other chipping vehicles on first seal.
Check application of MC3000 sprayed by dipping binder distributor,record quantity and application rate.
When chipping vehicles and roller have completed the chipping androlling, proceed with the following section to be sealed.
Back chip, broom and pneumatic roll first seal and prepare to receivesecond seal, either the same day or within 48 hours.
Second seal operations the same as for the first seal. On completion of the double seal, obtain approval from Engineers
representative and open road to traffic.
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6. Hazards and Risks
Risk assessmentsRefer to: - Health and Safety Plan 110.199/PRM/QSE/HSP/001
- BASIL READ Hazard Identification and Risk Assessment FormsOn going risk assessments and training of personnel is seen as paramount
importance to site management with the view to maintain a high priority on
safety risks issues.
Environmental risksRefer to: - Environmental Management Plan: 110.199/PRM/QSE/EMP/001
The following environmental risks have been identified:
Dust Fuel and oil spillage
Spillage of MC3000 Smoke and vapor emissions Waste Material
Measures to control and minimize risks are in place and the monitoring of
these controls remains the responsibility of all site personnel.