NZQA registered unit standard / 28680 version 1
Page 1 of 2
Title / Demonstrate knowledge of materials used in bituminous surfacing
Level / 4 / Credits / 6
Purpose / People credited with this unit standard are able to demonstrate knowledge of materials used in bituminous surfacing.
Classification / Infrastructure Works > Generic Bituminous Surfacing
Available grade / Achieved

Explanatory notes

1Competence in this unit standard requires knowledge of the current editions of the following references:

NZS 4407:1991 Complete set: Methods of sampling and testing road aggregates, Standards New Zealand, at

New Zealand Transport Agency specifications available at

NZTA M1:Specification forRoading Bitumens;

NZTA M6:Specification for Sealing Chip;

NZTA M6 Notes: Notes on Specification for Sealing Chip;

NZTA M10:Specification for Dense Graded and Stone Mastic Asphalts;

NZTA M/10DPAmendment for use with Drum Mixing Plants

NZTA M10 Notes: Notes to the Specification forDense Graded and Stone Mastic Asphalts;

NZTA M13:Specification forAdhesion Agents;

NZTA M13 Notes: Notes to Specification forAdhesion Agents;

NZTA P11:Specification forOpen Graded Porous Asphalt;

NZTA P11 Notes:Notes to the Specification forOpen Graded Porous Asphalt;

RNZ 9803, Quality Assurance for Bituminous Binders:A Code of Practice developed by Roading New Zealand, RNZ 9803:2013, Roading New Zealand; and

RNZ 9805, Quality Assurance of Aggregates for Roads RNZ 9805:2009,Roading New Zealand, available from Civil Contractors New Zealandat

Chipsealing in New Zealand, New Zealand Transport Agency, available at

2Definitions

AGO means automotive gas oil.

ALD means average least dimensionof sealing chip.

PSV means polished stone value.

Outcomes and evidence requirements

Outcome 1

Demonstrate knowledge of materials used in bituminous surfacing.

Evidence requirements

1.1Materials used in bituminous surfacing are identified and their properties and sources are explained in accordance with Chipsealing in New Zealand,NZTA M1, andNZTA M6.

Rangeaggregates, bitumen, binders, cutters and fluxes, additives;

aggregate types – sealing chips, crusher dust, filler, fly ash, recycled,sand;

aggregate properties – ALD,PSV;

binders – cutback, emulsion, polymer modified, latex;

binder properties – grades, penetration, viscosity, flash point;

cutters and fluxes – kerosene, white spirits, AGO;

additives – lime, fibre, adhesion agents, cement.

1.2Materials used in bituminous surfacing are explained in terms of where and why they are used.

Rangeaggregate grades, sealing chip grades, bitumen grades, cut back binders, emulsions, polymermodifiedbinders,additives.

1.3Bituminous mix production plants are identified and described in terms of the types of mix they produceand how they produce them.

Rangemix types – asphalt, cold mix, warm mix, slurry, micro surfacing.

1.4Static binder production plants are identified and described in terms of the types of mix they produce.

Rangebinders – cut back bitumen, emulsion, polymer modified bitumen, polymer modified bituminous emulsion, latex modified emulsion.

1.5Binders modified in bitumen sprayers are identified and described in terms of how they are produced.

Rangecutting back, dosing with adhesion agents, adding latex.

1.6Sampling and testing requirements for materials used in bituminous surfacings are identified anddescribed in accordance with NZS4407, NZTA M1, NZTA M10, NZTA P11, RNZ 9803, and RNZ 9805.

Rangeaggregates, bituminous mixes, binders, additives.

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

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 you wish to suggest changes to the content of this unit standard.

Infrastructure ITO
SSB Code 101813 / New Zealand Qualifications Authority 2018