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DIVISION 2 - SITE WORK

SECTION 02577 - STREET MARKING

PART 1 - GENERAL

1.01 DESCRIPTION

This Section covers providing the WORK required to apply painted traffic markings asshown on the Construction Drawings and specified herein, and as required to completethe WORK acceptable to Company Representative.

1.02 Reference Codes and Standards: Comply with applicable SAUDI ARAMCO Engineeringand Drafting Standards, Municipals and Codes and Standards as specified herein.

PART 2 - MATERIALS

2.01 SPRAY PLASTIC MATERIAL

A. Spray plastic material shall consist of a light-colored aggregate, pigment andextender bound together with a thermoplastic resin, plasticised as necessary.The composition of the materials as laid, that is including the spray on glassbeads, shall be according to AASHTO Designation M-249 with modification forthe white 20-2.0 for the binder and 52 maximum for the calcium carbonate andinert fillers (that include the aggregates).

B. The 20% glass bead is to be 10% pre-mixed and the other 10% is to be appliedby pressure application.

C. The proportioning of the various ingredients shall be such that the final product,when in molten state can be sprayed readily onto the road surface to give aneven line of good definition.

2.02 AGGREGATE

The aggregate shall consist of white silica sand, crushed calcite, calcined flint or quartz.

2.03 GLASS BEADS

Glass beads shall be free from air inclusions. Refractive index 1.5 minimum and spherespercent 90 minimum.

A. Gradation for Pre-Mix

Sieve Percent Passing by Weight

No. 12 100%No. 13 5 maximum

SECTION 02577

CONSTRUCTION SPECIFICATIONS

SABG GIRLS ELEMENTARY SCHOOL AND

BOYS INTERMEDIATE SCHOOL

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Glass beads sprayed onto the surface of the line shall conform to the followinggrading:

B. Gradation For Pressure Application

Sieve Percent Passing

No. 12 100%No. 30 85 - 100No. 40 45 - 100No. 50 10 - 45No. 80 0 - 20No. 200 0 - 5

Not less than 90% of the glass beads shall be transparent glass, reasonablyspherical and free from flaws. Glass beads shall be in accordance with AASHTODesignation M-247, except as modified below.

2.04 PIGMENT EXTENDER

The extender shall be calcium carbonate prepared from natural chalk. The total contentof pigment and extender shall be between 18 and 22%.

2.05 BINDER

The binder shall be based predominantly on synthetic hydrocarbon resins plasticisedwith mineral oil. The viscosity and wetting properties of the molten binder at the sprayingtemperature will be such as to give a composition of satisfactory spraying properties.

2.06 PROPERTIES

Unless otherwise specified herein, all tests shall be in accordance with the applicable

ASSHTO Designation M-247. Spray plastic shall have an open flash point exceeding235 degrees C.

PART 3 - EXECUTION

3.01 GENERAL

Application shall be by self-propelled mobile sprayer, or template. The road surface shallbe dry and free from loose mud and other extraneous matter. The drying time shall notbe more than 10 minutes, in the laboratory test. The spray plastic shall be used attemperatures between 200 - 220 degrees C.

3.02 RATE OF APPLICATION

Spray plastic shall be applied in intermittent or continuous lines or arrows, etc. ofthickness not less than 1.5 mm excluding glass beads referred to below.

SECTION 02577

CONSTRUCTION SPECIFICATIONS

SABG GIRLS ELEMENTARY SCHOOL AND

BOYS INTERMEDIATE SCHOOL

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In addition to the glass beads included in the materials, a further quantity of glass beadsshall be sprayed on the hot spray plastic line at the time of application. The applicationshall be pressurized and result in a residual quantity of glass not less than 450grams/sq.m.

3.03 FINISH

The finished lines shall be free from raggedness on sides and ends and be in true planewith the general alignment of the street. The upper surface of the lines shall be level,uniform and free from streaks or cracks.

END OF SECTION

SECTION 02577

CONSTRUCTION SPECIFICATIONS

SABG GIRLS ELEMENTARY SCHOOL AND

BOYS INTERMEDIATE SCHOOL

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