NZQA registered unit standard
17672 version 3
Page 1 of 4
Title
Demonstrate knowledge of the use of polymer modifiers in hot mix
asphalt production and construction
Level
4
Purpose
Credits
5
This unit standard is designed for people working in the asphalt
surfacing industry who require a knowledge of polymer
modified binders used in the design of hot mix asphalts.
People credited with this unit standard are able to: describe
polymer-modified binders used in hot mix asphalt; describe
storage and handling procedures for polymer-modified binders;
explain the effects on hot mix asphalt production of using
polymer-modified binders; and explain procedures for using
asphalt containing polymer-modified binders.
Classification
Pavement Surfacing > Asphalt Surfacing
Available grade
Achieved
Explanatory notes
1
The following requirements apply to this unit standard, and must be complied with:
AAPA Code of Practice: Manufacture, Storage and Handling of Polymer Modified
Binders, Australian Asphalt Pavement Association, available at
http://www.aapa.asn.au/cms_files/pmbcode.pdf;
The Bitumen Safety Handbook, Roading New Zealand, available for purchase at
http://www.roadingnz.org.nz.
Any requirements superseding any of the above will apply, pending the review of this
unit standard.
2
This unit standard requires a general understanding of polymer-modified binders;
more detailed knowledge is covered in Unit 21666, Explain the properties, selection,
and effects of polymer-modified binders in hot mix asphalt.
3
This unit standard does not assess the selection, storage, and use of multigrade
bitumens.
4
Assessment against this unit standard may be based on evidence from workplace
and/or provider contexts.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
5
17672 version 3
Page 2 of 4
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.
SDS refers to Safety Data Sheets.
Outcomes and evidence requirements
Outcome 1
Describe polymer-modified binders used in hot mix asphalt.
Evidence requirements
1.1
The properties of polymer modifiers and their effects on bituminous binders are
described in accordance with the AAPA Code of Practice.
Range
elastomers, plastomers.
1.2
Forms in which binder modifiers are supplied are described.
1.3
Polymer-modified binders are described in terms of their effects on hot mix
asphalts.
Range
temperature susceptibility, adhesion, cohesion, durability,
elasticity.
1.4
Polymer-modified binders are described in terms of the effect of adhesion
agents on them.
1.5
Asphalts containing polymer-modified binders are described in terms of
suitability for specified purposes.
Range
purposes – resist rutting, resist shoving, reduce flushing, increase
mix durability, reduce binder drainage.
Outcome 2
Describe storage and handling procedures for polymer-modified binders.
Evidence requirements
2.1
Health and safety hazards and adverse effects on the environment associated
with handling polymer-modified binders are described in accordance with The
Bitumen Safety Handbook and SDS.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
2.2
Handling and storage procedures for binders are described in accordance with
the AAPA Code of Practice and SDS.
Range
2.3
before, during, and after mixing;
includes but is not limited to – temperature control, blending,
mixing, emptying tank, emptying pipework, flushing tank, flushing
pipework.
The effects on binders of incorrect handling and storage are described in
accordance with the AAPA Code of Practice, The Bitumen Safety Handbook,
and SDS.
Range
2.4
17672 version 3
Page 3 of 4
includes but is not limited to – temperature control, reheating,
remixing, storage time, water contamination.
Risk management procedures for handling and storing polymers are described
in accordance with SDS and company procedures.
Range
risks include but are not limited to – excessive temperature, water
contamination.
Outcome 3
Explain the effects on hot mix asphalt production of using polymer-modified binders.
Evidence requirements
3.1
The effects of binders on mixing and storage temperatures and storage times
are explained.
3.2
The effects of binders on plant emissions are described.
3.3
The effects of binders on plant contamination and maintenance are explained.
Outcome 4
Explain procedures for using asphalt containing polymer-modified binders.
Evidence requirements
4.1
Procedures are explained in terms of health and safety requirements.
4.2
Procedures are explained in terms of handling and laying temperature, and
construction.
Range
4.3
temperature – delivery, laying, compaction, screed;
construction – compaction sequence, handwork, joints.
Procedures are explained in terms of construction plant clean-up.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
Planned review date
17672 version 3
Page 4 of 4
31 December 2016
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
25 November 2000
31 December 2013
Review
2
27 October 2005
31 December 2013
Review
3
15 March 2012
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 (CMR). 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 Infrastructure ITO askus@infratrain.co.nz if you wish to suggest changes to
the content of this unit standard.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016