NZQA Expiring unit standard
20447 version 4
Page 1 of 7
Title
Demonstrate knowledge of the care and operation of an asphalt
paving machine
Level
3
Purpose
Credits
15
This unit standard is designed for people intending to operate
asphalt paving machines, or to plan asphalt paving operations.
People credited with this unit standard are able to: demonstrate
knowledge of health and safety hazards and adverse effects on
the environment associated with operating an asphalt paving
machine and describe requirements for their control; describe
routine servicing and maintenance of an asphalt paving
machine, the setting up of a paving machine for operations;
screed operation, and level control systems and their operation;
the application of asphalt using a paving machine; the
emptying, cleaning, parking, and shutdown of an asphalt
paving machine; and the requirements for moving an asphalt
paving machine from site to site.
Classification
Pavement Surfacing > Asphalt Surfacing
Available grade
Achieved
Explanatory notes
1
Reference material recommended includes:
Traffic Regulations 1976;
manufacturer’s instructions.
2
Assessment against this unit standard may be based on evidence from workplace
and/or provider environments.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of health and safety hazards and adverse effects on the
environment associated with operating an asphalt paving machine and describe
requirements for their control.
Evidence requirements
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
20447 version 4
Page 2 of 7
1.1
Health hazards are identified and the procedures and equipment for controlling
them are described in accordance company procedures.
1.2
Safety hazards are identified and the procedures and equipment controlling
them are described in accordance with company procedures.
1.3
Adverse effects on the environment are identified and the procedures and
equipment for controlling them are explained in accordance with company
procedures.
1.4
Monitoring of health, safety, and adverse effects on the environment is
described in accordance with company procedures.
Outcome 2
Describe routine servicing and maintenance of an asphalt paving machine.
Evidence requirements
2.1
Water, fuel, engine oil, transmission oil, and hydraulic oil levels are described in
accordance with manufacturer’s instructions.
Range
includes fuels for screed heaters where fitted.
2.2
Routine lubrication requirements are described in accordance with
manufacturer’s instructions.
2.3
Maintenance requirements are described in accordance with manufacturer’s
instructions.
Range
wheels, tyres or tracks, machine controls and gauges, feeders,
conveyors, feed control gates, augers, screed, screed heater,
sensing and control equipment, wear on the screed plate, wear on
tamping bar if fitted, screed attack angle.
2.4
Limits of operator servicing and maintenance are described in terms of
situations requiring specialist attention.
2.5
Reporting of specialist service and maintenance requirements is described in
accordance with company procedures.
2.6
Documentation of routine maintenance is described in accordance with
company procedures.
Outcome 3
Describe the setting up of a paving machine for operations.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
20447 version 4
Page 3 of 7
Evidence requirements
3.1
Preparation of site prior to asphalt paving operations is described in terms of
type and purpose.
Range
3.2
Prestart safety and operational checks are described in accordance with
manufacturer’s instructions and company procedures.
Range
3.3
pretreatment, repairs, sweeping, protection of services, blinding,
membrane, keying of edges, levelling (scrub coat), sweeping, tack
coat.
includes but is not limited to – walk round, safety and fire
equipment, tyre condition and air pressure or track tension and
drive sprockets, gauges and controls (including governor on
engine), hopper, conveyors, feed control gates, auger.
Startup procedures and checks are described in accordance with
manufacturer’s instructions and company procedures.
Range
includes but is not limited to – visibility, park brake, transmission,
throttle position, instrumentation, warning lights, position of
hopper, position of screed, engine controls, hydraulic controls,
electronic controls;
checks – before starting engine, when engine is warm.
3.4
Manoeuvring machine into position is described in accordance with company
procedures and job requirements.
3.5
Mix feed system is described in terms of components and function.
Range
components – paving machine hopper, feed gates, mix conveyors,
augers, controls.
Outcome 4
Describe screed operation on an asphalt paving machine.
Evidence requirements
4.1
Screed, screed extensions, and telescopic screed are described in terms of
purpose.
4.2
Tamper bar and/or vibrators and their controls are described in terms of
purpose and location.
4.3
Operation of screed is described in terms of planning and self-levelling.
Range
Infrastructure ITO
SSB Code 101813
forces effecting planning and levelling, tow-arm pull, angle of
attack, telescopic screed.
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
20447 version 4
Page 4 of 7
4.4
Crown and crossfall adjustments are described in terms of conformance with
underlying shape and impact on mat texture.
4.5
Operation of screed is described in terms of thickness control and compaction.
Range
4.6
Operation of screed is described in terms of achieving contract requirements for
open graded porous and dense graded asphalts.
Range
4.7
level controls, setting of screed attack angle, operation of vibrators
and/or tamping bars.
requirements – longitudinal shape, transverse shape, thickness of
mat, uniformity of shape, surface texture.
Operation of screed is described in terms of screed setup and preparation for
use with different mix types.
Range
mix types – dense graded, open graded porous, SMA;
setup – screed attack angle, level, thickness, width, transverse
shape, transverse slope, vibrators, screed heating.
Outcome 5
Describe level control systems and their operation.
Evidence requirements
5.1
Description of level control systems includes manual controls and their
operation.
5.2
Automatic level control systems are described in terms of types and function.
Range
5.3
any two of – skis, levelling beams, string line;
one other may include but is not limited to – sonic, Paveset,
Synergy.
Set-up and operation of longitudinal and transverse automatic level control
systems are described in accordance with manufacturer’s instructions.
Outcome 6
Describe the application of asphalt using a paving machine.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
20447 version 4
Page 5 of 7
Evidence requirements
6.1
Description includes how paving machine driver/operator ensures that delivery
truck is positioned for the discharge of hot mix into the paving machine hopper.
6.2
Description includes how paving machine driver/operator ensures that the
hopper is loaded without spillage and with the required amount of correct mix.
6.3
Description explains the monitoring and visual inspections of mix quality before
and during discharge from truck to hopper.
Range
6.4
temperature;
visual inspections – mix type, consistency, segregation,
contamination, bitumen content, aggregate grading.
Asphalt application is described in terms of the monitoring and controlling of
laying operations.
Range
feed control gate settings, rate of asphalt feed, paving machine
speed, augur settings and adjustments, depth and spread rate.
6.5
Description explains influence of compaction equipment capacity on laying rate.
6.6
Description explains how paving machine speed and hot mix asphalt feed are
adjusted to maintain the level of material in front of the screed and to match the
required laying rate of the material.
Range
adjustments – truck delivery rate, asphalt feed rate, auger speed.
Outcome 7
Describe emptying, cleaning, parking, and shutdown of an asphalt paving machine.
Evidence requirements
7.1
Description identifies those parts of the machine that require emptying and
cleaning in accordance with manufacturer’s instructions.
7.2
Control of solvent runoff during the cleaning process is described in accordance
with company procedures.
7.3
Disposal of waste materials is described in accordance with company
procedures.
7.4
Parking of machine is described in accordance with company procedures and
manufacturer’s instructions.
Range
Infrastructure ITO
SSB Code 101813
includes but is not limited to – location, parking, security.
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
7.5
20447 version 4
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Shutdown procedures are described in accordance with manufacturer’s
instructions.
Outcome 8
Describe requirements for moving an asphalt paving machine from site to site.
Evidence requirements
8.1
Restrictions from driving a paving machine on the road are described in
accordance with Traffic Regulations 1976.
Range
8.2
wheeled or rubber-tracked machine.
Requirements for loading to, positioning on, and unloading from transporters
are described in accordance with manufacturer’s instructions and company
procedures.
requirements exclude – permits, securing, transporting.
Range
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
27 October 2005
31 December 2013
Revision
2
25 January 2008
31 December 2016
Review
3
15 March 2012
31 December 2016
Reinstatement
4
17 July 2014
31 December 2016
Consent and Moderation Requirements (CMR) reference
0101
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
20447 version 4
Page 7 of 7
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016