This section includes a number of documents in various forms such as Engineering Guidelines and Technical Briefs. All the documents below have been complied by CPPAA technical experts and are available here, free of charge, to download.
The publications have been listed under the following categories – acceptance and testing, durability and design, hydraulics, installation and pipe materials.
If you can’t find what your looking for, or would like some further advice or information on any of these documents, please contact us
Collaboration Driven Innovation for Deep Concrete Culvert Design and Installation – An Example of Safety in Design
Deep Culvert Design and Installation paper
Jacking Design Guidelines
Installation by jacking is a technique applicable to concrete pipe. This manual considers the design concepts required for such types of application, as well as installation design characteristics.
Designing Rigid and Flexible Pipeline Systems
Design requirements for rigid and flexible pipe vary markedly. This Technical Note highlights 5 main design differences that should be considered when comparing rigid and flexible pipe.
Influence of bedding support on pipe class
Bedding support is provided to a buried concrete pipe to act as both the foundation and also to increase the load carrying capacity of the pipeline. This TN describes what influence the bedding support can have on the design.
Comparison of pipeline design installation requirements rigid v flexible
This Technical paper was updated recently to focus primarily on rigid pipe (concrete) and flexible pipe (plastic). It outlines the main differences between the two materials when it comes to design requirements (specifiers) and installation requirements (contractors). Importantly it highlights the fact that concrete pipe is accepted based on performance, whilst plastic is accepted based on design calculation.
Long term stiffness of black max
The long term stiffness of black max flexible pipe is examined in this technical paper.
The design & installation requirements for various pipe types
Different pipe materials require different design requirements and installation techniques. This detailed paper explores the differences and explains the critical differences that need to be understood when specifying rigid, semi-rigid and flexible pipe.
Review and Analysis of post Installation Pipe Defects
Paper by H. Al-Saleem (Independent Contractor/ ProjectMax), S. Apeldoorn (ProjectMax), Branko Veljanovski (Auckland Council)
Potential Savings using minimal imported bedding material
Potential Savings flyer
Foreman’s guide to laying concrete pipe
Installing concrete pipe requires skill and attention to detail. This guide provides on-site workers a ready made reference sheet to address the important aspects of concrete pipe installation to ensure the job is done right first time.
Selecting Materials for Bedding of Steel Reinforced Concrete Pipe
This Engineering Guideline will provide industry with some alternatives to consider when the selected fill materils and corresponding grading limits outlined in AS/NZS 3725 cannot be sourced or achieved without compromising the bedding factor associated with the designed support type.
Practical Installation Design Options and Safety in Design for Deep Embankment’s Stormwater Culverts Husham I. Al-Saleem (Freelance Civil Consultant) & Americo dos Santos (Hynds Pipe Systems Ltd)
Paper by Husham I. Al-Saleem (Freelance Civil Consultant) & Americo dos Santos (Hynds Pipe Systems Ltd)
Compaction under construction loads
A series of charts that help you choose the right class of pipe and design for the appropriate depth of fill under typical construction loads.
Concrete pipe jacking
This technical brief is a summary of the CPAA Design Manual for Jacking Pipe. It provides an overview of the important aspects of concrete pipes used for jacking purposes along with the design and installation requirements.
Installation in unstable conditions
AS/NZS3725 Design for installation of buried concrete pipes assumes that concrete pipe will be installed on an even surface. What happens though when you are confronted by unstable foundation?
Guide for Loading and Unloading Concrete Pipes
The unloading and loading of concrete pipe often requires putting someone in a position where safety can be a concern. This Guide is intended for use by persons responsible for the safe loading, delivery and unloading of vehicles which transport precast concrete pipe and associated products from CPAA member factories to either construction sites or merchants’ yards.
Installation of small diameter pipe under roads
Small diameter concrete pipe requires extra attention during installation. Particularly under roadways. This Technical Note provides specifiers and contractors with a practical guide to ensure that small diameter pipes are installed to AS/NZS3725 without compromise.
Technical Brief – Bushfire Resilience: Why Drainage Infrastructure Matters More Than Ever
A summary of key findings from the US Dept of Transportation Federal Highway Administration TechBrief ‘Impacts of Wildfires on Highway Assets’
Evaluation of the durability of new vertical automated cast concrete pipe against machine made concrete pipe
A paper co-authored by Americo dos Santos of Hynds Pipe Systems to compare durability of automated cast pipe against machine made concrete pipe
Autogenous healing in concrete pipe
The self healing process of concrete, known as autogenous healing, plays a significant part in the durability aspects of concrete pipe. This technical brief will explain hw the process works and why it improves the durability of your asset.
Durability of Concrete Pipes in Chloride Environment
Technical Paper Durability of Concrete Pipes in Chloride Environment
Life cycle cost analysis in drainage projects
The cost of any infrastructure project needs to take into consideration the entire life cycle of the job. Drainage infrastructure is extremely important in this instance as it is a buried structure. (PDF, 312 kB)
Guide to Understanding AS/NZS 4058
This guide has been compiled by the Concrete Pipe Association of Australasia to assist industry stakeholders in understanding the background to various requirements and expectations that are outlined in AS/NZS 4058, and why these apply specifically to precast concrete pipes.
Concrete pipe in acid sulfate soil
Potential and actual acid sulfate soils can be an aggressive environment for concrete. This Technical Brief explains how concrete pipe can be made to last 100 years in this environment.
Cracking in concrete pipe
The fact sheet outlines some important details on concrete pipe and that never ending dilemma, the crack. Why are some cracks good in concrete pipe? What is an acceptable size? Read on for more details.
Designing Durable Concrete Pipelines
This document provides specifiers with a detailed guideline on how to design concrete pipe durability in agressive areas.
Life cycle cost analysis in drainage projects
The cost of any infrastructure project needs to take into consideration the entire life cycle of the job. Drainage infrastructure is extremely important in this instance as it is a buried structure.
Biogenic Sulphuric Acid Attack on Concrete Pipe
It is recommended that when designing concrete sewers to resist this severe attack mechanism, designers should consider alternative solutions for the interior of the pipe to deal with the aggressive environment. This TN looks at this in some detail.
Radial Nibs, Spacers and Longitudinal reinforcement ends in Reinforced Concrete Pipe
The concrete pipe standards AS/NZS4058 and AS/NZS3725 were updated in 2007. However, not everyone has updated their specifications to reflect this. This Technical Note outlines the important changes.
Environment exposure for SRCP
Concrete pipe is specified differently to typical concrete elements. Why – because generally it is buried under ground. This Technical Note explains what environments concrete pipe should be designed for and why.’
Specifying concrete for 100 years
Concrete pipe can be designed to last 100 years. This was ratified in 2007 by the most current version of the concrete pipe standard AS/NZS4058. For more details look at this Technical Note.
Concrete pipe in tidal flow and saline conditions
Concrete is a durable material that is traditionally suspect in chloride environments. This paper shows why concrete pipe should not be put into the same category as typical concrete.
How long will stormwater pipes really last
Can concrete pipe really last more than 200 years? This paper, originally presented for the IPWEA and then for CPAA, shows it can be done!
Impacts of the life cycle costs of stormwater drainage assets
This paper, prepared by GHD for the CPAA, explores the impacts of various pipe types and their life cycle costs as stormwater drainage assets.
Concrete pipe infrastructure – beyond 2000
This report, prepared in the 1990’s, was designed to look at concrete pipe and its design requirements well into the 21st century.
External corrosion & protection of buried concrete pipe
Concrete pipe is a buried structure. There are a number of contaminants that it can be exposed to. The report looks at the durable nature of concrete pipe and how it is affcted by external corrosive factors.
Practical steps to maximise the value of concrete Pipe
How can you maximise the value of your concrete pipe asset? This report helps you determine the best way how.
Concrete pipe exposed to acidic ground conditions
How does concrete pipe react when exposed to acidic soils? This report provides detail on what to expect and how the durability of the concrete pipe can be affected.
NZ Manhole/Access Chamber Guidance Note – NZ
Loads on circular steel reinforced Precast concrete manholes and access chambers
Assessing Internal Enviroment for Precast Maintenance Chambers
Understanding flexible plastic pipe
Did you know that flexible pipe relies on the strength of the soil surrounding it to act as a conduit? Did you also know that flexible pipelines require a detailed and onerous design process?
Updating specification of SRCP (March 2009)
The concrete pipe standards AS/NZS4058 and AS/NZS3725 were updated in 2007. However, not everyone has updated their specifications to reflect this. This Technical Note outlines the important changes.
Large Box Culverts (December 2013)
This Technical Note outlines the significant sections of the new large box culvert Standard, AS 1597.2:2013, and the likely impact it will have on industry, as well as alerting specifiers and contractors of changes related to manufactured product.
Update – small box culverts and AS 1597.1
AS 1597.1, the small box culvert standard, was revised in 2010. There are a number of significant changes to this standard that will impact industry, in particular as it is the first revision of this document in 36 years. This Technical Notes explains what these changes are!
Concrete pipe – hard facts
The paper outlines the important durability facts that should be understood when selecting a pipe material, and how this is reflected on concrete pipe.
Setting the standard for concrete pipe
AS/NZS4058 and AS/NZS3725 are the concrete pipe standards in Australia and New Zealand. This paper shows why they are the most appropriate standards for this material.
Recommended Practices for Hydro Jetting of Steel Reinforced Concrete Pipes
CCTV use in crack inspection reports in concrete pipes
Assessment guidelines for circumferential cracking
This guideline explains why concrete pipe may crack circumferentially, and how this issue can be avoided. The document also outlines what options there if your pipe has cracked.
Assessment guidelines for longitudinal cracking
This guideline explains why concrete pipe may crack longitudinally, where this is permissable, and how problems can be avoided. The document also outlines what options there if your pipe has cracked in this manner
Guidelines for deflection testing of flexible pipe
Pipelines need to be assessed before being placed into service to ensure they are fit for purpose. Flexible pipelines in particular need assessment due to deflection. This document provides the specifier with a detailed method statement for deflection testing before sign off of flexible pipe.
Impacts on the life cycle costs of stormwater drainage assets
This Technical Brief has been complied from a paper originallyprepared by GHD for the CPAA. It explores the impacts of various pipe types and their life cycle costs as stormwater drainage assets.
Crack Measurement by CCTV – The Facts
CCTV can be a useful method of general inspection but testing has proven that CCTV is not capable of making meaningful measurements.
Acceptance testing of concrete pipe
AS/NZS 4058 – 2007 is a performance-based Standard which requires the manufacturer to carry out a number of tests to demonstrate compliance with the Standard. This TN describes the two main performance tests for concrete pipe.
Acceptance testing of concrete pipe using CCTV
This paper presents an appropriate use of CCTV technology for the beneift of assessing installed steel reinforced concete pipe.
Hydraulics of Precast Concrete Conduits (Pipes and Box Culverts)
A detailed guideline to assist engineers with the hydraulic design of concrete culverts in Australia and New Zealand. The manual includes the theoretical concepts of hydraulic design, as well as containing the appropriate design aspects for runoff, culverts, drains, sewers and pressure pipes.
Colebrook White Charts
An appendix to the Hydraulics manual above.
Discharge capacity of pipelines
One notable area of diffrence amongst the various pipe materials available today is the relative hydraulic characteristics. The various types of pipes have differing discharge capacities and this document assists designers in ascertaining the appropriate hydraulic design requirements.
Flow characteristics of RC and HDPE pipe for stormwater drainage application
This document sets out relevant technical and engineering information concerning the discharge capacity of pipelines constructed from reinforced concrete pipe and high density polyethylene pipe.
Rational approach to hydraulic design
This technical brief is concerned primarily with the selection of the appropriate roughness coefficients for the calculation of pipeline capacity and the consequent selection of pipe diameter. An extremely important document for designers of pipeline systems.
Manufacturing concrete jacking pipe
An engineering guideline for designers to specify concrete jacking pipe that is made to Australian and New Zealand standards and specification.
Water absorption of concrete pipes
Concrete pipe is manufactured in accordance to a performance based standard. The durability test for concrete pipe is the water absorption test. This document outlines the methodology used and why strict rates of absorption are applied to concrete pipe.
Curing, stripping and handling concrete pipe
Like all concrete, SRCP needs to cured to ensure that the product can perform as it is expected to. Proper curing of concrete pipe is vital to ensure that stripping times are efficient and that the product can be handled without concern before the pipe is put into the service. This TN explains how this process works.
Quality management systems for concrete pipe
To meet the exacting standards outlined in AS/NZS 4058, precast concrete pipe has to be manufactured under controlled conditions. To ensure that these procedures are followed, AS/NZS 4058 requires pipe manufacturers to have an auditable ISO 9001 Quality Management System that monitors and demonstrates compliance. This TN shows why this is in place and why it is so important.
Optimum curing cycles for precast concrete
Many types of precast concrete are heated to accelerate the strength gain of the concrete to enable one or more daily uses of the mould. This early curing treatment also serves as a first stage in achieving the strength and durability but what are the optimum curing cycles for precast concrete?
Curing of concrete pipe – a brief abstract
A brief look at the curing mechanisms of concrete pipe, how they differ to typical concrete, and the impact on its properties.
Concrete Stormwater Pipelines – Improving Sustainability
Paper by Husham I. Al-Saleem (Freelance Civil Consultant) & Americo dos Santos (Hynds Pipe Systems Ltd)
Sustainability – Resource Smart Design
Utilising a class of pipe and installation that is structurally suitable for the design parameters without use of excess imported material is the sustainable choice.