28 Ms for Asphalt Road Works

METHOD STATEMENT FOR LAYING OF ASPHALT ROAD 

Effective Date : Document No : MS-28-LAS Revision No : A Approved By :

PROJECT

METHOD STATEMENT FOR LAYING OF ASPHALT ROAD **** (CIVIL) AMENDMENTS REV. NO

PAGE NUMBER

A

DESCRIPTION Prepared by

DESCRIPTION OF AMENDMENT

APPROVED BY (SIGNATURE)

EFFECTIVE DATE

METHOD STATEMENT FOR LAYING OF ASPHALT ROAD

TITLE

SIGNATURE

ENG’R. PRASATH.S

Reviewed by Approved by

CONTENTS 1. ACTIVITY Page 1 of 16

DATE



PROJECT 2. INTRODUCTION 3. TERMINOLOGY 4. SIGNIFICANT HAZARDS IDENTIFIED 5. ROLES & RESPONSIBILITY AND ORGANIZATION CHART 6. SEQUENCE OF ACTIVITIES WITH RESPONSIBILITIES 6.1

Pre-commencement Requirements

6.2

General Requirements

6.3

Co-ordination with Other Trades

6.4

Delivery, Storage & Handling of Materials

6.5

Execution

7. REQUIREMENTS 7.1 Plans/Records & Job instructions (Documentations) 7.2 Training 7.3 PPE (Personal Protective Equipment) 7.4 Equipment & Tools required 8. HSE & EMERGENCY PROCEDURES 9. REFERENCES 10. ATTACHMENTS

Page 2 of 16



PROJECT 1). ACTIVITY: LAYING OF ASPHALT ROAD This activity deals with the installation and sequence of Laying of Asphalt road as per approved drawings and project specifications and to ensure that the works are carried out in accordance with the HSEQ documents. 2). INTRODUCTION The purpose of this method statement is to describe the procedure which shall be followed for Laying of Asphalt road to comply with schedule of finishes, the General, Architectural & Civil Specifications for the Project and Owner / Engineer requirements. 3). TERMINOLOGY O/E: Owner / Engineer PPE: Personal Protective Equipment QC: Quality Control 4). SIGNIFICANT HAZARDS IDENTIFIED  Respiratory hazard  Injury to person  Wrist Pain/Stress/fatigue  Slip/trip/fall hazards  Back injury  Vehicles movement  Sharp edges  Cut Injury  Injury to Eye/Eye Irritation  Chemical usage hazard  Machinery  Work related upper limb disorders  Electric Shock

5). ROLES & RESPONSIBILITIES AND ORGANIZATION CHART 

Project Manager (Main Contractor) o The project manager is responsible for overall implementation of this Method Statement and HSEQ related to this activity. o Ensure that the Site construction and his team will aware of this Method Staement o Site construction and his team will report to the project manager. Page 3 of 16



PROJECT 

Construction Manager (Main Contractor) o Make arrangement for availability of all relevant documents. o Ensure the availability of necessary documents & resources available with Subcontractor. o Liaison with Owner/Engineer & Subcontractor in-charges for necessary test & inspection. o Tracks the schedule & plan work accordingly. o Liaison with all Electrical/MEP work in-charges for all interfaces works and plans the work accordingly at site.



Engineer (Main Contractor) o Ensures the control at work spots in person. o Verifying the percentage compliance as per risk assessment. o Ensures the emergency preparedness of team and taking the part in Subcontractor’s TBT (Tool Box Talk) o Ensures the work carried out as per latest approved drawings. o Ensure availability of necessary resources and approved documents. o Inspects the incoming materials in line with approved documents. o Ensure the quality of work/material and readiness for inspection.



Safety Officer (Main Contractor) o Responsible for ensuring HSE at all stages of work. o Ensures the compliance of all control measures at site as per approved risk assessment plan. o Ensures for all checklist as per HSE plan.



Project Manager (Subcontractor) o Ensure that appropriate resources are provided for the safe delivery of the work



QA/QC Engineer (Subcontractor) o o o o



Ensuring quality of work carried out at site Ensuring for inspection on hold points Maintaining all QC records Coordinating with O/E for inspections

Site In charge (Subcontractor) o Ensuring the relevant document o Plans the necessary men and material resources for timely completion and quality



Site Engineer (Subcontractor) o Ensuring the controls at work spot in person Page 4 of 16



PROJECT o o o o o o 

Verifying the % compliance as per risk assessment. Ensuring the emergency preparedness. Arranging the required inspections and permit Ensures all scaffolding erected safely and scaffolding tag system followed Ensures availability of the necessary resources. Ensuring availability of all activity relevant latest approved drawing and documents

Supervisor / Foreman (Subcontractor/Supplier) o o o o o o

Obtaining the permit (if required -e.g. Steel cutting) Conducting Tool Box Talk (TBT) based on risk assessment Arranging for appropriate tools and necessary skilled work force as required. Ensuring the works are carried out as per approved and latest drawing/documents Ensuring for Housekeeping always at work place Implementing the control measures as per risk assessment and also as mentioned in the permit. o Close monitoring till completion of work. o Close the work permit after restoration of work spot. 

Workmen (Subcontractor/Supplier) o o o o o



Wearing appropriate PPEs. Understanding and following the instructions given by line staff. Following the scaffolding tag system No horseplay and shortcuts. Informing the supervisor/foreman about any near misses, injuries and unusual

Safety Officer (Subcontractor) o Ensures all safety measures implemented/followed as per risk assessment and HSE Plan o Should inform the site engineer for any deviations from required procedure/standard practice o Should conduct a safety briefing in co-ordination with site engineer/supervisor over a specific HSE issue o Ensure all First aid cases are entered in first aid register and necessary awareness given to the victim o Ensures for inspection of power tools and scaffoldings



Surveyor (Subcontractor) o To check the levels, coordinates and alignments of every work activity at site.



Organization Chart (see for attachment) Page 5 of 16



PROJECT 6). SEQUENCE OF ACTIVITIES WITH RESPONSIBILITIES 6.1    6.2

Pre-commencement Requirements Approval of work procedures shall be obtained from O/E prior to the start of activity. Asphalt mix design test results shall be submitted to the O/E’s review. Safety regulations as per specifications and standard shall be followed General Requirements Before start of the work the following shall be ensured:

   6.3  

6.4    

6.5

Tools, Equipment & Machinery is suitable and approved for use. Availability of suitable quantity of approved material for the works as per specification and O/E requirements. Area clearance obtained from other discipline/subcontractor. Co-ordination with other trades No Laying of asphalt road work to be started unless it is cleared for Laying works. Prior to start the works, check all architectural, mechanical and electrical works are completed and MEP clearances shall be taken as required. Delivery, Storage & Handling of Materials All materials shall comply with the specifications regarding quality, dimensions, strength etc. The material shall be approved and shall be used as per the Approved drawings. Materials received at site shall be checked by O/E. Sampling / testing to be done as per requirements of specification

Execution : Procedure for laying Asphalt road works

A) Surface Preparation 

The surveyor shall mark the road centre line and width of the embankment prior to starting of any road works; The CONTRACTOR shall make detail survey of the existing services (If any) by the side of the road or crossing the road Page 6 of 16



PROJECT  Surveyor shall make a survey report for the existing levels prior to filling or cutting and engineer should make sure for the same  All the road works and road crossings must be executed as per the approved drawings and as per project specifications.

B) Road embankment   

Embankment shall be installed on top of the existing natural ground, thickness of this layer shall be at least 30 cm Material to be used for road embankment shall be A-1-a OR A1-b or A-2-4 in accordance with AASHTO classification Every layer should be compacted with heavy compactor and the compacted density of the soil shall be equal to or greater than 95% M.D.D., with no single value below 92%

C) Sub-grade 

Ensure that approved sub-grade material is used and the material sample shall be collected and tested as per project specifications upon receiving of material at site.



Sub-grade material shall be placed above embankment filling



The approved Sub-grade material shall be backfilled to the thickness of 300mm and it should backfilled in two layers (each layer 150mm ).



Compaction of sub-grade shall be facilitated by means of a 10-12 ton roller, rolling shall be continue to achieve the MDD of 98% as per approve drawings and project specifications.



Thickness of sub-grade shall not be less 300mm as specified in the approved drawings



The formation shall be shaped and graded to an even and uniform, well filled surface, shaped similarly to the finished surface of the road



Compaction test shall be done by approved laboratory for the Sub grade.

D) Laying of Kerbstones  

The above work shall be carried out according to the Method statement submitted vide DTS 1360 dated 22.10.2012. Laying of kerb stone shall be inspected and approved by O/E.

E) Sub-Base

Page 7 of 16



PROJECT 

Ensure that approved sub-base course material is used and the material sample shall be collected and tested as per project specifications upon receiving of material at site.



Thickness of sub-base course shall be 200mm as specified in the approved drawings, and it shall be placed in two layers.



Sub Base material spreading shall be started after receiving the compaction test results of Sub Grade.



Sub-base material loads shall be spread outside area on which it is spread to ensure that no segregation occurs and it shall be spread evenly using a grader to maintain the levels and thickness of layers.



Each layer shall be must be compacted to an average of 100% of MDD with no single value below 98%



Minimum field density tests shall be one test for every 300 m2 of granular sub-base laid



Minimum material test requirement shall be one sample for every 1,000cum of material and test shall be as follows grading, plasticity index, sand equivalent, MDD, and CBR, loss by abrasion by the approved laboratory as per the project specifications.

F) Aggregate Base Course 

Ensure that approved sub-base course material is used and the material sample shall be collected and tested as per project specifications upon receiving of material at site.



Thickness of sub-base course shall be 150mm as specified in the approved drawings.



Aggregate base course material spreading shall be started after receiving the compaction test results of Sub Grade.



Aggregate base course material loads shall be spread outside area on which it is spread to ensure that no segregation occurs and it shall be spread evenly using a grader to maintain the levels and thickness of layers.

G) Prime Coat 

Ensure that approved material is used and each consignment test certificate for prime coat (MC 70) shall be provided.



Prime coat shall be tested as per project specifications.



Prime coat shall be applied between road base course and bituminous base course as per approved drawings Page 8 of 16



PROJECT 

The same shall be cured for a curing period of 48 hours prior to laying of bituminous base course



Bituminous material for the prime coat shall be applied in quantities of at least 0.7 ltr/m2, not exceeding however 1.50 ltr/m2.

H) Bituminous Base Course 

Ensure that approved Bituminous base course material is used and each consignment test certificates shall be provided for Asphalt cement used (AC 40-50).



Bituminous base course shall be of thickness 90mm as per approved drawings.



Bituminous base course shall not be placed during dusty, foggy and Rainy weather.



Bituminous base course material shall be transported in trucks from hot mix plant & its final placement temperature shall not be less than 150º C.



Consistency of mixture shall be checked for each 200 tons.



Site engineer in coordination with surveyor must ensure laying of bituminous course to the correct levels and to the specified longitudinal and cross section profiles.



The Bituminous base course shall be evenly placed by mechanical spreader on a clean base in a manner that it does not become segregated.



The seams of the bituminous base course shall be sufficiently staggered against each other and it should be executed straights, longitudinal if necessary being adapted to the road alignment.



Bituminous base course shall be compacted evenly over the entire surface by using pneumatic & steel roller.



Gradient slope shall be maintained as per approved drawings.



The core sample to be taken after compaction to determine the layer thickness and the MDD as per project specifications.

I) Tack coat 

Ensure that approved material is used and each consignment test results shall be provided for Tack coay (SS1-h).



Tack coat shall be tested as per project specifications.



Tack coat shall be applied between bituminous base course and the wearing course as per the IFC drawings. Page 9 of 16



PROJECT 

Tack coat shall be cured for at least 1 hour



Tack coat shall be applied in quantities of at least 0.3 ltr/sqmtr, not exceeding, however 0.60 ltr/sqmtr

J) Wearing Course 

Ensure that approved material is used and each consignment test certificates shall be provided for Asphalt cement used (AC 40-50).



Temperature of mixture to be measured at site and it should not less than 1500C.



Consistency of mixture shall be checked for each 200 tons.



Thickness of wearing course shall be 60mm as per approved drawings



Wearing course shall be placed in one layer above the bituminous base course and one coat of tack coat shall be applied between bituminous base course and wearing course.



The Wearing course shall be evenly placed by mechanical spreader on a clean base in a manner that it does not become segregated.



The seams of the wearing course shall be sufficiently staggered against each other and it should be executed straights, longitudinal if necessary being adapted to the road alignment.



Wearing course shall be compacted evenly over the entire surface by using pneumatic & steel roller.



Site engineer in coordination with the surveyor must ensure the top levels and slope is maintained as per approved drawings.



The core sample to be taken after compaction to determine the layer thickness and the MDD as per project specifications.

K) Temperatures 

Temperature shall be checked whenever material is delivered to site



Aggregate ingredient shall be heated to a temperature between 160ᵒ to 179ᵒC



Asphalt cement shall be heated to a temperature between 146ᵒ and 156ᵒ C at mixing time



All bituminous mixtures shall leave the paver at a temperature not less than 150ᵒC



Prime coat (MC-70) between 50ᵒ and 80ᵒC



Tack Coat (SS-1 or RS-1) between 10ᵒ and 50ᵒC Page 10 of 16



PROJECT L) Joints 

Longitudinal joints in asphalt courses shall be offset by 300mm in relation to the longitudinal joints of the underlying course



Transverse joints in succeeding layers shall be offset by at least 2m. The same shall apply when new pavement is laid in contact to an existing, which will be cut back in steps, 2m wide in each of its layers



At transverse joints the previously laid work shall be cut to a vertical edge. Before laying the material against it, the vertical edge to be painted with hot bitumen



Minimum number of joints to b exercised/considered during execution

M) Compaction of Mixtures 

After spreading and strike-off, the rolling operation by pneumatic and stell roller shall start immediately and shall operate as close as possible to the paver without excessive tearing



Rolling will not be prolonged till cracks appear



The asphalt layer shall be compacted to a minimum degree of 98% of compaction

N) Thickness of Cores 

Depth of each bituminous paving course shall be measured by cored samples



Samples shall be one sample for 600 sqmtr



Cored sample shall be 10cm in diameter (nominal)

O) Surface Tolerances  Non Bituminous Courses 

The thickness and cross section as shown on the approved drawings shall not vary more than -5mm to +10mm from the required elevations.

 Bituminous Courses 

Maximum variations allowed for 3 M shall be : Page 11 of 16



PROJECT  Base Course = 4mm  Wearing Course = 3mm P) Road Markings   

Road markings shall be applied wherever necessary or as directed by ADWEA to control and direct the traffics. Road markings shall be marked by thermoplastic as per project specifications. Road markings shall be sprayed on the road in an even thickness of 2.0mm.

Q) Inspection and Testing   

Each activity like backfilling of Sub grade and Sub base, In situ Density test for Sub base & Sub grade and laying of Bituminous base course and Wearing course work shall be intimated to O/E through inspections. After due completion of laying of Asphalt work shall be offered to O/E’s inspection and comments on the work shall be rectified and notified for re-inspection if any. Testing of each consignment delivered to the site shall be carried out as per the specifications for road works of TRANSCO.

7). REQUIREMENTS 7.1 Plans /Records and Job instructions (Documentations) Before commencing the work the following things should be available:       

Inspection request for materials, erection & installation Approved drawings / Material approval for the work Method statement for the work Key site plan for that work area All inspected tools & machineries Emergency escape route without obstructions Clearance from electro mechanical in charge

7.2 Trainings  

Trained/Experienced & Skilled persons shall be used for the work All operator / Laborers are safety trained and toolbox shall be conducted for the each potential hazards mentioned in the Risk assessments.

7.3 PPE (Personal Protective Equipment)  Protective clothing Page 12 of 16



PROJECT         

Protective gloves Safety helmet Safety goggles Hard Gloves Hi-visibility jacket Flagging tape Warning tape Flasher light Safety Harness (above 1.8m)

7.4 Equipment and Tools required 

Manpower requirement 1. 2. 3. 4. 5.



General Supervisor/Foreman Charge hand Mason Helpers Electrician

- 01 no - 02 nos. - 02 nos - 06 nos. - 01 no.

Equipment 1. Shovel 2. Compaction roller machine 3. Spreader 4. Trucks 5. Sprit level 6. Plumb bob 7. Electric air blower/Air compressor for cleaning 8. Drilling Machine 9. Hammer 10. Measuring Tapes 11. Marker

7.5 Risk Assessment   

Risk assessment to be ensured that it is available in the work spot All control measures as per risk assessed to be implemented and ensured before start of work All workers shall be made aware of the risk involved in carrying out the activity and requirement of control measures during toolbox talk

Page 13 of 16



PROJECT 8). HSE & EMERGENCY PROCEDURES

HEALTH, SAFETY & ENVIRONMENT (HSE)

 The entire works will be carried out as per the guidelines established in the Project Specific HSE Plan  Utmost importance shall be given to safety or personnel and protection of existing above/under ground services. It will be ensured that the personnel involved are thoroughly aware of the safety regulations. To achieve the above the following shall also be ensured: 

Tool box meetings will be conducted before starting the works



All personnel will be provided with suitable personal protective equipment



Required permits will be obtained from the authorities concerned before starting the works, if any



Plant & equipments will be fully tested for safety compliances



Proper and safe access will be provided for workers to reach the work spot and carry out their works safely



Necessary and essential lighting and ventilation will be provided during the course work to protect labor from suffocation



Scaffolding and working platforms provided to facilitate the works will be checked frequently for its safety



The necessary safety measures will be taken to prevent accident or injury all the times. This may include barriers, warning tape / net, signage, watchman, flashing & rotating lights at night



Heat Stress training will be provided during summer season



Provision of adequate cool drinking water, shades if necessary will be arranged in place



Plants & Equipment will be provided with back-up lights and all other applicable safety devices

Emergency Procedure 

In case of any emergency situation the workmen should follow the emergency response procedure and must gather in the assembly point. The emergency response procedure should Page 14 of 16



PROJECT     

be conveyed to the work men through the toolbox talk in prior to the carrying out of the activity. The necessary safety measures will be taken to prevent the accident or injury all the times. This may include barriers, warning tape, net, signage, watchman, flashing & rotating lights at night. MSDS shall be made available prior to the start of the job Heat stress training will be provided during summer season. Provision of adequate cool drinking water, shades if necessary and salt tablets will be in place. Plants & equipment will be provided with back up lights and all other applicable safety devices. 

      

In case of major Injuries

Do not panic. Call ambulance and notify emergency team at site Do not move the injured unless he is in danger If danger exists, he shall be assessed by a trained and qualified first aider before moving. Use a stretcher. Do not crowd around the victim. Do not give anything to eat or drink. Ensure adequate air and lighting. Only trained and qualified first aider shall treat the victim and ensure that his airway is kept clear. Victim shall be transported to hospital in an ambulance. Preserve the accident scene for further investigation.  In case of Fire



Follow Transco/s approved emergency procedure as per HSE Plan.  In Case of Flood

 

Evacuate immediately to the nearest highest location you are in. Notify the Emergency Controller of the site  EMERGENCY CONTACT NUMBERS: Name

Position Project Manager Site Manager Safety Officer Fire Fighter / First Aider Pick Up driver

Page 15 of 16

Phone No



PROJECT POLICE AMBULANCE FIRE SERVICE HOSPITAL

999 998 997 MAFRAQ 02 5823100

9). REFERENCES:  S-TR-CIVIL-ROAD (REV.0-2010)  PROJECT QUALITY PLAN  PROJECT HSE PLAN  DRWG. NO. N7204.1E-R-E-5370-S-7151 REV. A SHEET 1~1  DRWG. NO. N7204.1E-R-E-5370-S-7201 REV. A SHEET 1~1  DRWG. NO. N7204.1E-R-E-5370-S-7212 REV. A SHEET 1~2  DRWG. NO. N7204.1E-R-E-5370-S-7401 REV. A SHEET 1~1  DRWG. NO. N7204.1E-R-E-5370-S-7402 REV. A SHEET 1~1  DRWG. NO. N7204.1E-R-E-5370-S-7351 REV. A SHEET 1~1  DRWG. NO. N7204.1E-R-E-5370-S-7352 REV. A SHEET 1~1  DRWG. NO. N7204.1E-R-E-5370-Q-7001 REV. A SHEETS 1~7  DRWG. NO. N7204.1E-R-E-5690-H-7113 REV. A SHEETS  REF. NO. N7204.1E/MASS/0235 - ASPHALT MIX DESIGN 10). ATTACHMENTS:      

S-TR-CIVIL-ROAD (REV.0-2010) ORGANIZATION CHART RISK ASSESSMENT SHEETS APPROVAL COPY OF ASPHALT MIX DESIGN STANDARD DRAWINGS REFERENCE DRAWINGS

Page 16 of 16

28 Ms for Asphalt Road Works

Recommend Documents