28 Ms for Asphalt Road Works

METHOD STATEMENT FOR LAYING OF ASPHALT ROAD

Effective Date : Document No : MS-28-LASRevision No : AApproved By :

PROJECT


****

(CIVIL)

AMENDMENTS

REV. NOPAGE

NUMBERDESCRIPTION OF AMENDMENT

APPROVED BY (SIGNATURE)

EFFECTIVE DATE

AMETHOD STATEMENT FOR LAYING OF ASPHALT

ROAD

DESCRIPTION TITLE SIGNATURE DATE

Prepared by ENG’R. PRASATH.S

Reviewed by

Approved by

CONTENTS

1. ACTIVITY

of 16



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

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 / EngineerPPE: Personal Protective EquipmentQC: 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.

Construction Manager (Main Contractor) of 16



PROJECT

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 Ensuring quality of work carried out at siteo Ensuring for inspection on hold pointso Maintaining all QC recordso Coordinating with O/E for inspections

Site In charge (Subcontractor)

o Ensuring the relevant documento Plans the necessary men and material resources for timely completion and quality

Site Engineer (Subcontractor)

o Ensuring the controls at work spot in person

of 16



PROJECT

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

Supervisor / Foreman (Subcontractor/Supplier)

o Obtaining the permit (if required -e.g. Steel cutting)o Conducting Tool Box Talk (TBT) based on risk assessmento Arranging for appropriate tools and necessary skilled work force as required.o Ensuring the works are carried out as per approved and latest drawing/documentso Ensuring for Housekeeping always at work placeo 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 Wearing appropriate PPEs.o Understanding and following the instructions given by line staff.o Following the scaffolding tag system o No horseplay and shortcuts.o 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)

of 16



PROJECT

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

Organization Chart (see for attachment)

6). SEQUENCE OF ACTIVITIES WITH RESPONSIBILITIES

6.1 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

6.2 General Requirements

Before start of the work the following shall be ensured:

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.

6.3 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.

6.4 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

6.5 Execution : Procedure for laying Asphalt road works

A) Surface Preparation

of 16



PROJECT

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

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

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

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.

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

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 :

Base Course = 4mm Wearing Course = 3mm

of 16



PROJECT

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 Protective gloves Safety helmet Safety goggles

of 16



PROJECT

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. General Supervisor/Foreman - 01 no2. Charge hand - 02 nos. 3. Mason - 02 nos4. Helpers - 06 nos.5. Electrician - 01 no.

Equipment

1. Shovel2. Compaction roller machine3. Spreader4. Trucks5. Sprit level6. Plumb bob7. Electric air blower/Air compressor for cleaning8. Drilling Machine9. Hammer10. Measuring Tapes11. 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

8). HSE & EMERGENCY PROCEDURES

of 16



PROJECT

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 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.

of 16



PROJECT

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:

of 16

Name Position Phone NoProject ManagerSite ManagerSafety OfficerFire Fighter / First AiderPick Up driver

POLICE 999AMBULANCE 998FIRE SERVICE 997

HOSPITAL MAFRAQ02 5823100



PROJECT

9). REFERENCES:

DOCUMENT.DOCX

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:

DOCUMENT.DOCX

ORGANIZATION CHART

RISK ASSESSMENT SHEETS APPROVAL COPY OF ASPHALT MIX DESIGN STANDARD DRAWINGS

REFERENCE DRAWINGS

of 16

28 Ms for Asphalt Road Works

Documents

Transcript of 28 Ms for Asphalt Road Works