ASCP Concrete Pavement Grey Card – Questionnaire - Australian Society for Concrete Pavements (ASCP)

Welcome to the TfNSW/ ASCP Pavement Grey Card Questionnaire.

Please answer ALL questions that appear.

If you have any questions during the questionnaire, please reach out to your trainer for clarification.

GOOD LUCK!

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1.

Preliminaries

Please complete your full name

2.

Preliminaries

Company name

3.

Preliminaries

Please enter todays date

4.

Pavement Elements

Select the reasons why lean concrete is used as a subbase

Supports undowelled joints and its cheap

It's a nice colour and minimises wet weather days

Non-erodible and supports undowelled joints

It's easy to place and non-erodible

5.

Pavement Elements

What is the name of the layer in a concrete pavement carrying the main traffic load?

Base

Dowelled joints

Subbase

Select material

6.

Pavement Elements

For a plain concrete pavement without dowelled joints, what is the TfNSW standard slab length between joints?

3.8m

4.2m

4.0m

4.8m

7.

Pavement Elements

What are the main benefits of using a concrete shoulder?

The road looks better and allows uniform thickness across the carriageway

Allows an extra lane and the road looks better

Allows an extra lane and eliminates shoulder maintenance

Reduces wheel stresses by about 30% and eliminates a longitudinal joint with different materials

8.

Making Good Concrete

What is the correct requirements when making good concrete for paving?

The right time, the right materials and the right slump

The right slump, the right time, the right mixing

The right materials, the right proportions and the right mixing

The right materials, the right slump and the right mixing

9.

Making Good Concrete

Approximately, how many minutes does it take to thoroughly mix a full standard Ready-Mix/Pre-Mix truck (agitator) load of concrete, after all the materials including any water added on site, have been put in the bowl?

10-15 minutes

3-4 minutes

Less than 1 minute

1-2 minutes

10.

Making Good Concrete

In current TfNSW specifications, what is the maximum time (in minutes) after completion of batching at which additional water can be added to an agitator delivered concrete

10 minutes

40 minutes

60 minutes

90 minutes

11.

Making Good Concrete

What are 2 reasons why a low water / cement ratio is important in concrete?

Colour and strength

Durability and colour

Conserve water and durability

Strength and durability

12.

Forms, Reinforcement, Dowels and Tiebars

Select the correct words to complete the following sentence - "The ground beneath both the tracks of a slip forms pave and on which forms will be set, needs to be __________________"

Wide, even soft

Continuous, even and firm

Continuous, even and soft

Wide, even and firm

13.

Forms, Reinforcement, Dowels and Tiebars

Select the 4 points to look for when setting or checking fixed forms.

Support, bracing, pinning and new

Rough, bracing, pinning and jointing

Support, bracing, pinning and jointing

Support, bracing, out of alignment and jointing

14.

Forms, Reinforcement, Dowels and Tiebars

Why is it important to have no gaps under fixed forms?

It's easy to blow out the form before the pour

Allows slurry to flow out of the way

Allows water to dissipate

To be compacted, concrete has to be confined

15.

Forms, Reinforcement, Dowels and Tiebars

When a pavement slab is reinforced, is the reinforcement located in the top third or the bottom third of the slab?

Bottom third

Top third

16.

Forms, Reinforcement, Dowels and Tiebars

In a reinforced pavement, is the reinforcement STOPPED SHORT or CARRIED THROUGH a joint that is intended to move?

Carried through

Stopped short

17.

Compaction

How many cubic metres of concrete can one vibrator fully compact in 1 hour?

As much as delivered

5 - 10 m3

40 - 50 m3

15 - 20 m3

18.

Compaction

When using the "dip" method for compaction of concrete on the job, what is the minimum number of seconds during which the poker vibrator should be kept in the concrete at each dip location before it is taken out?

1 - 2 seconds

10 - 15 seconds

5 - 6 seconds

As long as it levels out the concrete

19.

Compaction

In TfNSW specifications, what is worse - under-vibration or over-vibration?

Under-vibration

Over-vibration

20.

Compaction

Select the 2 methods used with hand held vibrators for manually vibrating concrete pavements.

Dip and drag

Dip and poke

Poke and random

21.

Compaction

During compaction with hand held poke vibrators, how far away should you stay from the front edge of the placed concrete?

0.5 metres

0 metres

1 metre

3 metres

22.

Compaction

When using a vibrating screed, how far back do you stop the screed from where the internal vibration finished?

0 metres

0.5 metres

2 metres

1 metre

23.

Compaction

For a vibrating screed, what are the recommended number of passes and maximum speed of each pass?

2 passes @ 1.5 - 2 metres per minute

2 passes @ 2 - 3 metres per minute

1 pass @ 1.5 - 2 metres per minute

2 passes @ 4 - 5 metres per minute

24.

Compaction

When using the 'drag' method of internally vibrating concrete, what are the recommended maximum spacing and speed for vibrators being dragged through the concrete?

350mm spacing & 1.5 - 2 metres per minute

700mm spacing & 1.5 - 2 metres per minute

350mm spacing & 2.5 - 3 metres per minute

As fast as you can go, to level the concrete

25.

Compaction

What comes first - internal compaction or screeding the surface with a vibrating screed?

Screeding with vibrating screed

Internal compaction

Either can be completed first

26.

Placing and Paving

For either fixed form paving or slipform paving, where is the best place to deposit the concrete?

Close to where it was tested

As close as possible to its final location

Anywhere. Let the paver push it or the crew shovel it into position

27.

Placing and Paving

For slipform paving and tip truck delivery, give 2 points that the person either spotting the truck or tipping the loads should look for?

Concrete is not segregated and complete truck discharge

Truck registration and full discharge

Concrete is not segregated and tyre wear

Tyre wear and truck registration

28.

Finishing and Texturing

What are the 3 main types of tools used for manual finishing of concrete pavement?

Back of the shovel, broom and hand float

Broom, shovel and edging tool

Bull float, hand float and scraping straight edge

Hand float edging tool and back of the shovel

29.

Finishing and Texturing

What is the purpose of a hessian drag texture?

Hide the surface imperfections

Provides a uniform appearance

Provides skid resistance and friction for braking

30.

Finishing and Texturing

What points should you follow when using a hessian drag to get a good result?

Drag it as quick as you can and keep it straight

At a right angle, wetted down and renew each day

Make a swirl pattern and keep clean

Walk on the slab when dragging the hessian

31.

Finishing and Texturing

What is the purpose of transverse or longitudinal tined texturing?

Make the pavement louder to keep drivers awake

Provides a visual pattern

Provide an escape path for water to prevent aquaplaning

32.

Curing and Protection

Concrete is cured for two reasons; one is strength. What is the other?

Appearance

Colour consistency

Durability

33.

Curing and Protection

The sprayed curing compound forms a film on the concrete surface. TfNSW specification requires the film to be....

removed after 2 weeks

a continuous unbroken film maintained and intact for 7 days

kept damp for 7 days

34.

Curing and Protection

For SUBBASE paving, what is the normal application rate for curing compound in litres per square metre (m2)?

1L per m2

0.2L per m2

0.6L per m2

0.1L per m2

35.

Curing and Protection

For SUBBASE paving, when should curing start?

Within 3 hours of placing

When you can walk on the concrete without marking it

Immediately after surface is free from bleed water

36.

Curing and Protection

For BASE paving, when should curing start?

At least 1 hour before the crew leaves site

Within 15 minutes of the surface reaching a low-sheen bleed water condition

First thing the next day

37.

Curing and Protection

For BASE paving with with a tined surface texture, what is the normal application rate for curing compound for each pass in litres per square metre (m2)?

0.3L per m2

0.1L per m2

2.0L per m2

0.6L per m2

38.

Feedback

How do you rate this course out of 1 - 5? (1 being extremely low, 5 being extremely high)

4 (high)

2 (low)

1 (extremely low)

3 (neutral)

5 (extremely high)

39.

Feedback

Who was your trainer today?

40.

Feedback

How do you rate your course trainer out of 1 - 5? (1 being extremely low, 5 being extremely high)

4 (high)

3 (neutral)

2 (low)

1 (extremely low)

5 (extremely high)

41.

Feedback

Will this course help you to do your job better?

Yes

No

Maybe

42.

Feedback

What other information would be useful in this course?

43.

Feedback

Do you have any other feedback on this course?

Thankyou for completing the TfNSW /ASCP Pavement Grey Card Questionnaire.

Please confirm with your trainer that they have received your results before exiting the meeting.

Your Grey Card will be processed by TfNSW within the next 4-8 weeks and will be sent to the address you provided on your sign on sheet.

Should you have any questions, please direct them to training@concretepavements.com.au

Thanks!