NZQA registered unit standard
28704 version 1
Page 1 of 5
Title
Demonstrate knowledge of equipment and processes for laying
bituminous mixes
Level
4
Credits
6
Purpose
People credited with this unit standard are able to demonstrate
knowledge of equipment used in pre-construction processes,
construction processes, and post-construction processes for
laying bituminous mixes.
Classification
Infrastructure Works > Bitumen Surfacing Construction
Available grade
Achieved
Explanatory notes
1
Competence in this unit standard requires knowledge of the current editions of the
following references:
New Zealand Transport Agency specifications at http://www.nzta.govt.nz :
NZTA M10: Specification for Dense Graded and Stone Mastic Asphalts;
NZTA P11: Specification for Open Graded Porous Asphalt;
NZTA P11 Notes: Notes to the Specification for Open Graded Porous Asphalt;
NZTA P23: Performance Based Specification for Hotmix Asphalt Wearing Course
Surfacing;
Paving plan.
2
Definitions
Company procedures refers to all documented policies, procedures, and
methodologies of the candidate’s employer at the time of training, including but not
limited to those relating to health, safety, environment, quality, and operations.
Maintenance period means the period of time from the removal of temporary speed
restrictions until final acceptance by the engineer, during which time the contractor
may have corrective action obligations specified in the contract specifications.
Protection period means the period of time from the completion of construction until
the removal of temporary speed restrictions, during which time the contractor may
have corrective action obligations specified in the contract specifications.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of equipment used for laying bituminous mixes.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28704 version 1
Page 2 of 5
Evidence requirements
1.1
Asphalt paving machine is described in terms of its components and functions.
Range
1.2
Other bituminous mix construction equipment is described in terms of its
functions.
Range
1.3
components – machine controls and gauges, hopper, mix
conveyors, feed control gates, augers, screed and screed settings,
screed heater, tamper/vibrating bar, level controls and types,
extensions;
functions – spreading, planning, levelling, compacting.
rotary broom, mix-carrying truck, loader types, roller types, suction
sweeper, tack wagon, sprayer, shuttle buggy.
Bituminous mix construction equipment is described in terms of its suitability
and limitations for sealing jobs.
Range
equipment – paving machine, roller types, loader types, truck
types, brooms, shuttle buggy;
suitability, where relevant, for – access to site, pavement strength,
mix type, layer depth, joint locations, size of contract;
limitations may include – manoeuvrability, vehicle size, vehicle
weight and its distribution, capacity such as hopper size or laying
width, accuracy of controls, travel speed relative to output.
Outcome 2
Demonstrate knowledge of pre-construction processes for laying bituminous mixes.
Evidence requirements
2.1
Checks to be made prior to accepting a site for laying bituminous mixes are
explained in terms of meeting contract requirements.
Range
2.2
checks – pavement construction complies, surface dried back,
pavement levels, surface drainage provided for, membrane seal,
pre-seal repairs completed, off-road drainage in place, site extent
marked out, measure and agree levelling quantities;
seven types of preseal repairs are identified;
examples of checks are given from two different sites.
Pre-construction processes are described in terms of general site preparation
requirements for laying bituminous mixes.
Range
Infrastructure ITO
SSB Code 101813
programming pavement repairs, hazard identification and control,
environmental protection, temporary traffic management, loading
sites, parking and unloading areas, ends and widths marked out,
location on road marked.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
2.3
Pre-construction processes are described in terms of complying with site
specific instructions.
Range
2.4
tests – coring, non-destructive, permeability, texture, sand circle,
materials, laser, skid resistance.
Pre-construction processes are described in terms of identifying and notifying
affected parties.
Range
2.8
takes account of – mix design, rolling pattern, compaction
monitoring.
Sampling schedule is explained and tests are described.
Range
2.7
pre-treatment types – milling, cleaning, sweeping, scrub coat,
levelling, tack coat, scabbling, texturizing, binder removal;
factors – pavement condition, treatment type, site constraints,
resources.
Pre-construction processes are described in terms of determining and
confirming bituminous mix paving plant, equipment, and labour resources.
Range
2.6
site safety, public safety, pavement shape, geometric constraints,
live load limitations, access, obstructions, radio, drop off area,
climate, vibration, location of ancillary services, one other.
Pre-construction processes for laying bituminous mixes are explained in terms
of pre-treatment types and factors to take into account when determining pretreatment requirements.
Range
2.5
28704 version 1
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four affected parties, four methods of notification.
Pre-construction processes are described in terms of identifying, recording, and
protecting service overs, road furniture, and adjacent surfaces.
Outcome 3
Demonstrate knowledge of construction processes for laying bituminous mixes.
Evidence requirements
3.1
Transport of bituminous mix plant, equipment, and materials to laying site is
explained in terms of logistics.
Range
Infrastructure ITO
SSB Code 101813
plant – asphalt paving machine, rollers, broom, loaders,
transporter, trailers, shuttle buggy;
logistics – loading and unloading, number of trucks, timing of
trucks, type of trucks, fit paving machine, transport route.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
3.2
Loading and transporting of mix is explained in terms of avoiding both
segregation and cooling.
Range
3.3
factors – timing and temperatures, roller types for different mix
types and mix depths, single width rolling procedures, rolling
pattern, laydown trial, target density, compacted thickness,
finished surface, shape, levels, falls, drainage.
Bituminous mix laying is described in terms of items to be monitored during
construction.
Range
3.6
screed setting, spreading, trimming, hot joints, cold joints,
shoulders, level control, depth measurement, mix temperature,
joint location, transverse joint detail, longitudinal joint detail, tack
coat, joint heaters, wing management, segregation management,
compaction adjustment, paving in echelon.
Bituminous mix laying is explained in terms of factors to be taken into account
for achieving required compaction of finished surface.
Range
3.5
loading mix into – truck, shuttle buggy, paving machine;
requirements – vehicle type, vehicle cleaning, load protection,
temperature, truck deck insulation, truck deck detail, release
agent, despatch times, travel times, waiting times, site access;
mix temperature at – arrival, loading, release into paving machine.
Mix laying is described in terms of coordinating resources and following the
paving plan.
Range
3.4
28704 version 1
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consistent surface texture, texture, compaction, shape, depth,
temperature.
Bituminous mix laying site safety and traffic management are explained in terms
of exclusion zones, site access, and adjustments required during construction.
Outcome 4
Demonstrate knowledge of post-construction processes for laying bituminous mixes.
Evidence requirements
4.1
Clean-up processes are explained in accordance with company procedures.
Range
4.2
collecting waste mix, roadmarking, removing service protection,
waste disposal.
Protection of the road mat is explained in accordance with company
procedures.
Range
during curing, during the protection period;
timing, traffic loads, traffic speed.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28704 version 1
Page 5 of 5
4.3
Opening the site to traffic is explained in accordance with contract requirements
and company procedures.
4.4
Monitoring the newly laid bituminous mix surface for the maintenance period is
described in accordance with contract requirements, and corrective actions are
explained in accordance with company procedures.
corrective actions for – traffic damage, loss of texture, unravelling,
rutting, loss of shape, faulty compaction.
Range
Planned review date
31 December 2019
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
19 February 2015
N/A
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 (CMRs). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Comments on this unit standard
Please contact the Infrastructure ITO qualifications@infrastructureito.org.nz if you wish to
suggest changes to the content of this unit standard.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016