NZQA registered unit standard
28701 version 1
Page 1 of 6
Title
Interpret chipseal design instructions and construct chipseal
surfacings
Level
4
Credits
14
Purpose
People credited with this unit standard are able to: interpret
chipseal design instructions; prepare to construct chipseal
surfacings; and construct chipseal surfacings.
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:
RNZ 9803, Quality Assurance for Bituminous Binders: A Code of Practice developed
by Roading New Zealand, RNZ 9803:2013, Roading New Zealand, available at
http://www.nzcontractors.co.nz;
RNZ 9904, 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/;
RNZ 9805, Quality Assurance of Aggregates for Roads RNZ 9805:2009, Roading
New Zealand, available 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/resources/code-temp-trafficmanagement/index.html;
Chipsealing in New Zealand, New Zealand Transport Agency, available at
http://www.nzta.govt.nz/resources/chipsealing-new-zealand-manual/;
New Zealand Transport Agency specifications at http://www.nzta.govt.nz/resources/:
NZTA M1: Specification for Roading Bitumens;
NZTA M6: Specification for Sealing Chip;
NZTA M6 Notes: Notes on Specification for Sealing Chip;
NZTA P/3: Specification for First Coat Sealing;
NZTA P/4: Specification for Resealing;
NZTA P17: Performance Based Specification for Reseals;
NZTA T10: Specification for State Highway Skid Resistance Management;
NZTA T10 Notes: Notes to the Specification for State Highway Skid Resistance
Management;
Operating manual;
Site safety plan;
Contract quality plan.
2
Definitions
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28701 version 1
Page 2 of 6
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.
Operating manuals refers to the plant operating manual and manuals written for
specific components or items of plant and equipment that may be published by the
manufacturer or the company.
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.
PMB means polymer modified binder.
PSV means polished stone value.
Outcomes and evidence requirements
Outcome 1
Interpret chipseal design instructions.
Range
instructions for three sites covering four different surface types such as –
granular, stabilised, chipseal, bituminous mix.
Evidence requirements
1.1
Chipseal design instructions are interpreted to determine plant, materials, and
processes to be used for constructing the chipseal.
Range
1.2
plant – broom, sprayer, tanker, chip truck, chip spreader type,
rollers, transporter equipment;
materials – binders spray rates, binder quantities ,chip size, chip
source, chip quantities;
processes – stockpile pre-treatment, environmental preconstruction checks, weather checks, rolling pattern, temporary
traffic management, roadmarking.
Binder application rates are determined from chipseal design instructions and
checked against site conditions, and any adjustments are communicated and
recorded in accordance with contract requirements and company procedures.
Range
Infrastructure ITO
SSB Code 101813
examples of adjustments – application rate, transverse variable,
cutters, volatiles, water content of emulsions, PMB;
reasons are given for any adjustment.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
1.3
28701 version 1
Page 3 of 6
Compaction requirements and rolling methods are determined from chipseal
design instructions, and any adjustments are communicated and recorded in
accordance with contract requirements and company procedures.
Range
requirements – equipment, water, critical timing;
methods – number of passes, speed of roller, roller type, number
of rollers, rolling pattern;
adjustments for – drop in pavement temperature , change in
weather.
Outcome 2
Prepare to construct chipseal surfacings.
Range
evidence is required of working on three contracts covering each of the
following surfaces, binders, and seals in any combination:
surfaces – granular, stabilised, chipseal, bituminous mix;
binders – hot bitumen, cut back, emulsion, PMB, polymer modified emulsion,
latex modified emulsion;
seals – first coat, two coat, reseal, membrane.
Evidence requirements
2.1
Pre-construction checks are carried out and surface is swept in accordance with
company procedures.
Range
checks – day’s weather, two day forecast, rain radar, pre-seal
repairs completed, construction signed off ready for sweeping,
start and finish locations, chip condition.
2.2
Requirements for site safety, environmental protection, and temporary traffic
management are confirmed and 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 sealing in accordance
with company procedures.
Range
examples of objects needing protection – service covers, fire
hydrants, adjacent surfaces, roadmarking offsets.
2.4
Parties affected by site works are identified and notified in accordance with
contract requirements and company procedures.
2.5
Spray runs are planned to match seal design, site conditions, seal type, chip
stockpile location, and available plant in accordance with company procedures.
Range
Infrastructure ITO
SSB Code 101813
start and end positions, rate changes, widths, tapers, seal joins,
centreline, shoulders;
evidence is required of communication with supervisor and chip
truck drivers.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
2.6
28701 version 1
Page 4 of 6
Sampling and testing requirements are confirmed in accordance with company
procedures.
Outcome 3
Construct chipseal surfacings.
Evidence requirements
3.1
First spray run is checked and assessed for compliance with target in
accordance with contract quality plan requirements, and any adjustments are
made in accordance with company procedures.
Range
3.2
After each spray run, checks are made for compliance with quality
requirements, samples are taken in accordance with company procedures, and
sprayer is reloaded in accordance with company procedures and operating
manual.
Range
3.3
checks – binder temperature remains within parameters for
spraying, no streaking, no binder flow, ambient temperature, dips,
binder quantity.
Joints and overlaps are constructed to match contract quality plan requirements
and corrections are made in accordance with company procedures.
Range
3.4
checks – length, width, before and after dip, chip depth; chip
adhesion, chip cleanness, chip dryness;
assessment – visual on road, compare with sprayer data.
paper start and finish, staggered start and finish for multicoat seal,
centreline, wheelpaths.
Chip spread is checked visually against target photos for each seal type and is
corrected as required. Any consequent adjustments to application rates are
agreed with engineer in accordance with company procedures.
Range
corrections – chip truck calibration, mat test, ground speed, chip
from stockpile, percentage coverage.
3.5
Chip spread is monitored visually and adjusted to apply the agreed chip
application rate for each section on site.
3.6
Compaction is checked for compliance with quality requirements in accordance
with company procedures.
Range
Infrastructure ITO
SSB Code 101813
checks – compaction started on time, rolling pattern.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
3.7
Traffic and site protection are monitored and consequent actions taken in
accordance with the CoPTTM, site safety plan, and company procedures.
monitor – starting traffic on new seal, cones, guidance, traffic
speed, traffic rolling.
Range
3.8
Hand work is managed to ensure surfacing complies with contract requirements
in accordance with NTZA P/3, NZTA P/4, and company procedures.
Range
3.9
hand work on areas that cannot be reached by the chipseal
machinery – edging, application rate, extent of seal, spreading
chip, finishing.
Site tidiness is managed in accordance with site safety plan, RNZ 9904:2006,
and company procedures.
Range
3.10
28701 version 1
Page 5 of 6
chip stockpiles, loading and unloading of plant and materials,
transfer of binder in the field, disposal of waste materials, picking
up start and finish paper, flattening piles of chips, cleaning up
stockpile site.
Protocols for seeking assistance in the event of uncertainty over technical
requirements are followed in accordance with company procedures.
examples of uncertainty – wrong seal design, wrong treatment,
wrong binder, wrong chips, seal not working, chips not fitting.
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.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28701 version 1
Page 6 of 6
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