NZQA registered unit standard
28705 version 1
Page 1 of 5
Title
Interpret paving instructions and construct bituminous mix layers
Level
4
Credits
14
Purpose
People credited with this unit standard are able to: interpret
paving instructions for bituminous mix layers; prepare to
construct bituminous mix layers; and construct bituminous mix
layers.
Classification
Infrastructure Works > Bitumen Surfacing Construction
Available grade
Achieved
Explanatory notes
1
The following requirements apply to this unit standard, and must be complied with:
The Safe Handling of Bituminous Materials Used in Roading – Code of Practice RNZ
9904:2006, Roading New Zealand, available for purchase at
http://www.nzcontractors.co.nz/;
Code of Practice for Temporary Traffic Management (CoPTTM), New Zealand
Transport Agency, available at http://www.nzta.govt.nz;
New Zealand Transport Agency specifications at http://www.nzta.govt.nz;
NZTA M/10 Specification for Dense Graded and Stone Mastic Asphalt.”
NZTA P23: Performance Based Specification for Hotmix Asphalt Wearing Course
Surfacing;
Site safety plan;
Contract quality plan;
Paving plan.
2
Assessment against this unit standard must be based on evidence from a workplace
context.
3
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.
OGPA means open graded porous asphalt.
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.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28705 version 1
Page 2 of 5
Outcomes and evidence requirements
Outcome 1
Interpret paving instructions for bituminous mix layers.
Range
paving instructions may be in contract specifications, and/or plans, tender
documents, and instructions;
instructions for three jobs with varying requirements, such as different:
surface layers, such as wearing, levelling, base;
clients, such as large commercial contract, port, NZTA resurfacing, local
authority resurfacing, road reconstruction;
mix types, mix thickness, mix binder;
paving details, such as tack coat, application rate, membrane seal, and
binder type.
Evidence requirements
1.1
Pretreatment requirements are identified in site instructions and explained in
terms of what is required to meet them.
Range
1.3
Plant and equipment requirements are identified in paving instructions and
explained in terms of selecting what is appropriate and available for each job.
Range
1.4
specifications relating to – air temperature, ground temperature,
paving season, mix temperature, layer thickness, compaction, joint
locations, shape, trimming, edges, shoulders.
Compaction specifications are identified in paving instructions and explained in
terms of procedures for meeting requirements for each job.
Range
1.6
plant – brooms, loaders, delivery vehicles, trucks, paving
machines, rollers;
equipment – levels, hand tools.
Laying specifications are identified in paving instructions and explained in terms
of meeting requirements for each job.
Range
1.5
pretreatments – milling, patching, levelling, cleaning, sweeping,
tack coat.
equipment, water, critical timing;
rolling sequence – joints, edges, breakdown, second, finishing;
roller types -- static, vibratory;
compaction adjustment – density, compacted depth, thickness,
surface consistency and shape;
compaction tests – non destructive, cores;
texture, target air voids.
Site safety and environmental protection factors are identified in paving
instructions and explained in terms of requirements for each job.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
1.7
28705 version 1
Page 3 of 5
Sampling and testing requirements for bituminous mix laying are identified in
paving instructions and explained in terms of scheduling for the job.
Range
density testing, mix sample, tack coat sample, mix temperatures
into truck, out of tuck into paver, out of paver, mix depths, time
arrived, time into paver, rolling pattern completed.
Outcome 2
Prepare to construct bituminous mix layers.
Range
evidence is required of preparing and laying each of the following layers and
mix types in any combination:
layers – base course, wearing course, levelling;
mix types – M10, M14, M15, M20, M28, M40, SMA, OGPA.
Evidence requirements
2.1
Preconstruction checks are carried out and surface is swept in accordance with
company procedures.
Range
checks – day’s weather, rain radar, three day forecast,
temperatures, preseal repairs completed, construction signed off
ready for sweeping, start and finish locations.
2.2
Requirements for site safety, environmental protection, and temporary traffic
management are implemented in accordance with company procedures.
2.3
All objects and surfaces that need protection are either protected or marked and
recorded so they can be found and/or reinstated after paving in accordance with
company procedures.
Range
2.4
examples of objects needing protection – service covers, fire
hydrants, adjacent surfaces, roadmarking offsets.
Parties affected by site works are identified and notified in accordance with
contract requirements and company procedures.
Outcome 3
Construct bituminous mix layers.
Range
evidence is required of preparing and laying each of the following layers and
mix types in any combination:
layers – base course, wearing course, levelling;
mix types – M10, M14, M15, M20, M28, M40, SMA, OGPA.
Evidence requirements
3.1
Mix deliveries are managed in accordance with paving plan and company
procedures.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
Range
3.2
changes in requirements are to be communicated to the mix plant
in time to avoid over supply and minimise waste.
Laying process is monitored for quality and actions are taken to maintain
compliance with the contract quality plan in accordance with company
procedures.
Range
3.3
temperatures, layer thickness, avoiding segregation, joints.
Compaction techniques and roller patterns are managed in accordance with the
paving plan and company procedures.
Range
3.4
28705 version 1
Page 4 of 5
evidence is required of undertaking preliminary tests to aid in
controlling layer thickness.
Hand work is managed to ensure mix layer complies with contract
requirements.
hand work – edging, spreading, finishing, areas that cannot be
reached by the paving machine;
management ensures minimal handling, avoids segregation, and
compacts mix as soon as possible.
Range
3.5
Traffic and site protection are monitored in accordance with the traffic
management and site safety plans.
3.6
Actions required in the event of uncertainty over technical requirements are
explained and followed in accordance with company procedures.
examples of uncertainty – mix seems different, site not ready for
laying, more pre-levelling is needed than planned for, membrane
seal not done, preseal repairs not completed.
Range
3.7
Weather conditions are monitored and consequent adjustments are made to the
work programme as required.
Range
rain radar, three day forecast.
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.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28705 version 1
Page 5 of 5
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