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concrete specifications > 13045 P-621 Pavement Markings > Flashcards

13045 P-621 Pavement Markings Flashcards

2
Q

What are the 4 different activities covered under P-621?

A

A: 1) prep and painting of markings and stripes, 2) installing preformed thrmoplastic markings, 3) placing polymer concrete micro overlays, 4) removal of existing markings

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3
Q

What is required to be provided for all P-621 materials shipped to the job?

A

A: a certified test report for materials shipped to the project.

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4
Q

What type of paint is required?

A

A: Waterborne, meeting the requirements of Fed. Spec. TT-P-1952E, Type II

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5
Q

What temperature must preformed thermoplastic markings be required to be installed at?

A

A: 35 F

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6
Q

What type of boarder is required for thermoplastic markings?

A

A: an integral, non-reflectorized black border

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7
Q

What % of glass beads must be contained in the preformed thermoplastic markings?

A

A: 30%

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8
Q

What spec must the glass beads for the thermoplastic markings meet?

A

A: Fed. Spec. TT-B-1325D, Type IV

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9
Q

Two types of beads are required, intermixed graded glass beads and what?

A

A: Factory applied coated surface beads, see spec for requirements

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10
Q

What is the thickness required for the preformed thermoplastic markings?

A

A: 65 mils (1.7mm)

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11
Q

How are preformed thermoplastic markings applied?

A

A: using a large radiant heater

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12
Q

Marking material must set up how quickly in order for the access route to be re-opened to traffic?

A

A: 15 mins

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13
Q

What type of reflective media shall be applied to paint markings?

A

A: glass sphered meeting the requirements of TT-B-1325D, Type III

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14
Q

Is the use of chemicals allowed when removing pavement markings?

A

A: No

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15
Q

What weather conditions are required for the application of paint?

A

A: existing surface is dry and clean, atmospheric temp is at least 45 F and rising, pavement surface temp is at least 5 F above the dew point and the weather is not excessively windy, dusty, or foggy

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16
Q

Who determines the suitability of the weather for striping?

A

A: the City

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17
Q

What type of equipment shall be using for the application of paint?

A

A: an approved atomizing spray-type marking machine suitable for application of traffic paint.

18
Q

What types of markings must the striping equipment be capable of applying?

A

A: markings from 6 to 26 inches in a single pass with uniform coverage and capable of applying two colors simultaneously without applying glass beads to the black markings.

19
Q

What types of removal are acceptable?

A

A: Removal methods must be approved by the engineer, such as sandblasting, waterblasting, or beadblasting

20
Q

What must be done to clean the surface of the pavement immediately before paint application?

A

A: waterblasting

21
Q

What types of methods are not acceptable for removal of paint?

A

A: masking with paint, bituminous material, surface treatments, or other cover material

22
Q

What is required to be removed before paint is applied?

A

A: Curing compound by sandblasting or high pressure water

23
Q

What is required to be approved by the city prior to striping?

A

A: the layout of markings

24
Q

Who is required to approve conditions prior to painting?

A

A: The city

25
Q

At what rate shall paint be applied to PCC?

A

A: 115 sq ft per gallon

26
Q

At what rate shall paint be applied to freshly sealcoated asphalt concrete?

A

A: 75 sq ft per gallon

27
Q

At what rate shall paint be applied to other asphalt concrete?

A

A: 115 sq ft per gallon

28
Q

What rate are the Type III glass beads required to be applied at?

A

A: 10 pounds per gallon

29
Q

What type of glass beads are required for red and pink markings?

A

A: Type I, gradation A glass beads at the rate of 5 pounds per gallon of paint

30
Q

What is the tolerance required to be met for paint edges?

A

A: edges of the markings shall not deviate from a straight line more than 1/2 in per 50 ft.

31
Q

How much time is required between placement of concrete or bituminous surface course or seal coat and the application of paint?

A

A: 7 days

32
Q

What is the difference between temporary and permanent markings?

A

A: Temporary markings shall be applied at a 50% application rate and glass beads shall not be required.

concrete specifications (5 decks)

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