The purpose of this roadwork method statement is to ensure that all road marking and signs are executed safely and in accordance with the contract requirements and that all quality assurance and quality control activities are conducted in a systematic manner, also the road work are inspected and conformance to project specifications and applicable codes and standards is verified and documented.

Definitions & Abbreviations

GM: General Manager

PM: Project Manager

SE: Site Engineer

QS: Quantity Surveyor

ITP: Inspection Test Procedures

HSSE: Heath ,Safety, Security, and Environmental

TS: Technical Specifications

BOQ: Bill of Quantities

References:

• Contract General & Special Conditions
• BOQ
• Approved Drawings
• Specifications – Shop drawings (Respectively).
• British Standard (Otherwise Specified).

Materials & Tools

• Road marking Thermoplatic Paints (White, Red and Yellow)
• Road marking cold paint
• Warning tapes
• Temporary signs
• Safety Barriers
• Traffic Cones
• Grade Stakes
• Soap Solution ( not detergent)
• Cleaning Cloths, Roller Brushes, Paint Brushes, Permanent Tapes, fine emery papers etc.

Roles and Responsibilities

GM will coordinate with PE / SE and ensure that the necessary resources to implement the approved method statement and ITP have been allocated to the task.

PM / SE will ensure that the site preparation activities are conducted according to the approved method statement and all  in-situ tests according to the ITP are implemented.

Quantity Surveyor along with our gang take the quantity done daily or after the completion of project and verified by client site engineers.

Quality Control Engineer will ensure that the materials being used are in accordance to the project specifications, the approved method statement and the ITP.

HSSE officer along with his team will ensure implementation of all HSSE procedures related to the nature of the works being carried out and in accordance with the project HSE Plan.

Hot Applied Thermoplastic Materials

Paint shall be procured from an approved manufacturer, tropical  grade suitable for application, by the means proposed, to the specified road surfaces, and must demonstrate skid resistance appropriate to local traffic conditions. The material shall comply with BS3262 : 1987 Specification for Hot- applied Thermoplastic Road Marking Materials.

The material shall be supplied in containers which do not contaminate the contents and which protect the contents from contamination and stored  in accordance with the manufacturer’s instructions.

Ballotini (glass beads) is incorporated in the mixture during the manufacture of the thermoplastic material. The quantity of ballotini included shall be between 13% and 22% by weight of the total mix and shall be counted as part of the aggregate.

The Ballotini will comply with BS6088 : 1981 (1993) Specification for Solid Glass Beads for use with Road Markings.

Alternatively the Ballotini (glass beads) may be applied to the surface of the thermoplastic immediately after application is complete.

Application of the beads shall be at least 300 grams / square metre or as otherwise directed by the consultant/client engineer.

Features and Recommended Use

Retro -reflective thermoplastic road marking material with excellent whiteness.

Conforms to the British Standards (BS) specifications, 3262 : Part 1/1989.

Based on aliphatic chemistry, offers superior weathering resistance and color stability.

Intermix glass beads offers long lasting retro-reflectivity.

Optional balance between melt flow and flow resistance to achieve well defined lines as per the desired width and thickness.

Excellent wear resistance and adhesion on asphalt roads Suitable for application with manual, creed/ extrusion automatic machines.

Road Marking Thermoplastic Material Specifications

Color	White and Golden Yellow
Flow resistance	Not more than 25%
Driving time	Max. 15 minutes
Composition
Binder	20 ± 2%
Glass beads (Intermix)	Min.20%
Aggregate including glass beads, Pigment	80 ± 2%
Softening Point	Min. 95
Daylight Luminance @45oC
White	Min. 70%
Yellow	Min. 50%

Direction of Use for Thermoplastic Road Marking Materials

Heat the material to 180 – 200 ^oC  in the pre – heater with adequate homogenized liquid.

Ensure that the road surface is clean, free from dust and moisture.

For aged asphalt roads and concrete roads application, a primer coat is recommended for proper bonding of the material with the road surface.

Ensure that the primer is thoroughly dry and void of solvent prior to application of the thermoplastic material.

Ensure temperature of 190 – 210 ^oC and adequate agitation during application.

Do not hold thermoplastic above 180 ^oC for more than 6 hours.

Do not heat the material above 225 ^oC at any point of time.

Change in color indicates that the material has been scorched owing to overheating and needs to be discarded.

Drop on glass beads must be immediately deposited after thermoplastic application.

Cold Marking Materials

Acrylic Based Road Marking Paint is a quick drying, solvent based paint, based on solvent based acrylic resin.

Can be used for marking roads and kerbs.

Easy to apply.

It has UV resistant colors.

Ideal for use on asphalt and concrete roads, primarily for kerbstones, speed humps or other areas with light traffic.

It can be used for both Roads and kerbs painting.

The temperature of the substrate should be minimum 10 ^oC and at least 3 ^oC above the dew point of the air, measured in the vicinity of the substrate.

Good ventilation is usually required in confined areas to ensure proper drying.

The moisture content in the substrate should not exceed 4 % (by weight).

Coating should not be exposed to oil, chemicals or mechanical stress until fully cured.

Drying times are generally related to air circulation, temperature, film thickness and number of coats, and will be affected correspondingly.

Recommended data given is, for recoating with the same generic type of paint.

In case of multi-coat application, drying times will be influenced by the number and sequence and by the total thickness of previous coats applied.

The surface should be dry and free from any contamination prior to application of the subsequent coat.

Specifications for Cold Marking Materials

Colors	White, Black, red and Yellow
Solids by volume	37 ± 2 volume% Theoretical
Specific gravity	1.2 Theoretical Only for white color
Flash point	Closed cup: 25iC (77iF)
VOC	584 g/l ISO 11890 EU
Dry film thickness	40 – 80 µm
Wet film thickness	110 – 210 µm
Theoretical spreading rate	9.25 – 4.5 mm/l

 Road Marking Plant & Equipment

The major equipment used for road marking works includes, but are not limited to the followings:

• Hofmann H33-3 type Thermoplastic spray machine
• Preheating twin boiler Trucks for machine marking and Thermoplastic hand marking
• 3 ton double cabin pickup for Sandblasting and Cold paint marking
• Graco Line machine for paint marking / Lazer Cold
• 300 CFT mobile type Air Compressor
• 7 ton double cabin pickup for Machine marking
• Graco Line Lazer Automatic self- propelled machine for Cold plastic marking
• 3 ton double cabin pickup for Safety purpose

Pavement Marking Equipment / Process Monitoring Equipment

Portable environmental measuring devices for temperature & humidity

Paint application rate computers

Electronic scales / bead bucket and stop watch for glass bead application rate

Applicator speedometers, calibrated over range of applicator speeds

Paint pressure and / or hydraulic/air pressure gauges

Wet film gauges

Bead application comparison

Post-Application Measuring Equipment

• Non-destructive eddy current device such as the Elcometer and  steel  test plates for dry film
• Retro reflectometers
• Skid resistance
• Digital wheel meter

HSSE Requirements

Approved safety plan and procedures shall be strictly followed.

Where possible hazards may arise from filling activities, the necessary safety measures will be taken to prevent accident or injury at all times. This may include barriers, warning tape/ net, signage, watchman, and proper lighting.

Where work upon existing services may be required, the necessary work permits and safety equipment should be obtained prior to the activity commencement.

HSSE officer will enforce that Personal Protective Equipment (such as Respiratory mask, Safety Shoes, Face mask, Hard hats, etc.) be worn by site personnel at all times during construction activities.

Prior to the commencement of any activities, the workforce will receive an induction talk on the project site safety requirements, this induction talk will include both activity specific safety issues, as well as general safety requirements.

Safety engineer will ensure that Personal Protective Equipment is worn by site personnel at all times during construction / road marking activities.

Plant and Equipment will be provided with back-up alarms, lights, and all other applicable safety devices.

Proper access to the work area shall be maintained throughout the working period.

Road Marking Procedure

The Client Surveyor will locate and mark all Centerlines for all types.

Width and length for all types must be marked.

Road Marking By Thermoplastic Material

Preparation of Road Surface

The material shall be applied only on a surface which is clean and dry.

It shall not be laid over loose detritus, mud or similar extraneous  matter, or over an old paint marking, or over an old thermoplastic marking which is faulty.

New surfaces must be allowed to weather and compact for at least 72 hours before applying the marking.

In the case of smooth polished surfaces, e.g. smooth concrete, old asphalt surfacing with smooth polished surface stones, and/or where the method of application requires or the Engineer directs, a tack coat shall be applied to the surface prior to the application.

The tack coat shall be as recommended by the manufacturer of the thermoplastic material and to the approval of the Engineer.

Faulty thermoplastic markings shall be removed if required by the Engineer.

Preparation of Thermoplastic Material

The material shall be melted in accordance with the manufacturer’s instructions in a heater fitted with a stirrer to give a smooth consistency to the thermoplastic and such that local overheating shall be avoided.

Temperature of the mass shall be within the range specified by the manufacturer and shall on no account be allowed to exceed the maximum temperature stated by the manufacturer.

The molten material shall be used as expeditiously as possible and for thermoplastics which have natural resin binders or are otherwise sensitive to prolonged heating, the material shall not be maintained in a molten condition for more than 4 hours.

Laying of Thermoplastic Material

Markings may be applied by hand Screeding, hand propelled machine or by self propelled machine as approved or directed by the Engineer.

After transfer to the laying apparatus the material shall be maintained within the temperature range specified by the manufacturer and stirred to maintain the right consistency for laying.

In the case of screeded application, material shall be laid to a thickness of not less than 3 mm or more than 6 mm, unless specifically authorised by the Engineer.

In the case of sprayed application, the material shall be laid to a thickness of not less than 1.5 mm unless specifically authorised by the Engineer.

In all cases, the surface produced shall be uniform, appreciably free from bubbles and streaks.

The Contractor shall not proceed with the marking work until the equipment, method of application, and rate of application, as established by a test section, have been approved by the Engineer.

Road marking work shall be carried out very carefully to a regular alignment in accordance with the Drawings.

Straight edges and templates shall be used if required by the Engineer.

Where applicable the Ballotini (glass beads) shall be applied to the surface of the thermoplastic immediately after application is complete and shall be applied in a controlled manner by use of a spreading device which will permit an even spread from a fixed height of between 300mm and 400mm or otherwise as the manufacturer may recommend. (A wheel mounted, variable width, funnel applicator may be suitable).

The loss of glass beads after 3 weeks traffic shall not exceed 10 percent of the total applied.

Re-use of Thermoplastic Material

At the end of the day’s work, as much as possible of the material remaining in the heater and/or laying apparatus shall be removed.

This may be broken and used again, provided that the maximum heating temperature has not been exceeded and that the total time during which it is in a molten condition does not exceed the requirements.

Road Marking by Cold paint

Manufacturer’s recommendation:

• Wet Film Thickness 150 microns 2 Coats (300 microns by Spray)
• Dry Film Thickness 60 microns 2 Coats (120 microns by Spray)

Materials: Approved Acrylic Based Road Marking Paint

Plant & Equipment: Line Lazer (Cold Road Marking Painting Machine)

Surface Preparation: Washed and dry, clean, clear dust-free virgin surface.

Machine Application Procedure

• Set marking machine in the correct position along the alignment of marking.
• Spray the Line with Line Lazer Machine at the rate of 300 microns wet film thickness, i.e. 120 microns dry film
• Spray Glass Beads at the rate of approximate 300g/m² (Drop-on Method)
• Remove the masking tape after 20 minutes

Manual Application (Double Application)

Mask the perimeter of the line with masking tape.

Apply Paint with roller or brush after drying the first application.

Repeat the same and apply glass beads.