the challenges of resurfacing mount pleasant airfield

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AsphaltProfessional
THE JOURNAL OF THE INSTITUTE OF ASPHALT TECHNOLOGY No 55 • FEBRUARY 2013
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THE CHALLENGES OF RESURFACING
MOUNT PLEASANT AIRFIELD
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CPD and CPR –
What you need to know
Derby Graduation ceremony
The Laying of Warm Asphalt
and all your regular features
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NO 55 • FEBRUARY 2013
Contents AsphaltProfessional
5 President’s View
THE JOURNAL OF THE INSTITUTE OF ASPHALT TECHNOLOGY
6 Institute News
Scottish Branch News
10 IAT North/South Conference
Securing the Road Ahead in a Changing Editorial
Climate
12 Institute News
Irish Branch News
This is the fi rst edition of another new year and the good news is that in a few
14 PTS weeks’ time you will be getting a printed copy in the post. The Council has made
great strides in turning round the fi nances of the Institute to the effect that we
Testing the Nation
can now afford to return to a printed journal. The next 2 editions will be sent to
15 Bruntingthorpe you along with a copy of the Highways Magazine while we make some long term
Calling the Asphalt Industry arrangements for printing and distributing future issues. We will still keep the online
version for those that prefer that method but for the many who prefer the printed
17 Technical Paper
matter this will follow a week or so later.
Warm mix asphalt reaches Dublin’s Fair City
The year is also off to a good start with the preparations for the National Conference
22 Diary
which is being organised by the South East Branch. Please note that the conference
Branch Events will be on a Friday this year June 28th with the Presidents dinner and Golf day on
Thursday 27th. The venue for the conference is the Radisson Blu Hotel at Stansted
24 Technical Paper
airport and the golf will be at the Manor of Groves Golf Club. The theme this year is
CPR and CE marking –
an International one with a chance to fi nd out what is happening elsewhere in the
are you ready for 1st July 2013?
asphalt world. A full programme will be available shortly so keep an eye on the web
28 Eurovia Infrastructure Limited site for more details and to get your booking in early, last year proved very popular
with rooms at the hotel booking up quickly.
Prevention Rather Than Cure
30 Publications There are some changes this year which will have a major impact on our industry
concerning the Construction Products Directive (CPD) and the Construction Products
Report on the meeting of the Nottingham
Regulations (CPR). John Bradshaw-Bullock has kindly written a short article on what
Asphalt Research Consortium (NARC)
is happening and the likely consequences which is printed in this journal. This is a
32 University of Derby must read for most of our members as the full rules will take effect on July 1st 2013
Graduation Ceremony Paves The Way and being prepared in advance is critical.
To Success For Industry Professionals
Arthur Hannah Editor
33 Movember

34 The Social Whirl

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35 Institute Update
The Institute of Asphalt Technology
PO BOX 17399 • Edinburgh • EH12 1FR
Tel [phone]
email [email protected]
website www.instituteofasphalt.org
ISSN 1479-6341
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© 2013 Institute of Asphalt Technology PRESIDENT Jukka Laitinen, FIAT
No material in this issue may be reproduced in any form except VICE PRESIDENT & EDITOR Arthur Hannah, FIAT
by permission in writing from the Institute Secretary. ASSISTANT EDITOR Pippa Birch, MIAT
Contributors express their personal and professional opinions BUSINESS & DEVELOPMENT MANAGER Russell Hunter
in this publication and their views are not necessarily those
of the Institute of Asphalt Technology. HON TREASURER Ray Wood, MIAT
Designed by Sharon Levett • [email protected]
Features
10
IAT North/South Irish
Conference
Securing the Road Ahead in a Changing Climate.
Taking place on 7th March at the Europa Hotel,
Belfast the Conference will benefi t personnel
engaged in road construction and maintenance
from National Organisations, Contractors, Local
Authorities, Material Suppliers, Consultants,
Academics and Researchers.
S
R
17 24
Warm mix asphalt reaches CPR and CE marking – are
E
Dublin’s Fair City you ready for 1st July 2013?
P
A
P For sustainability and environmental reasons, The most important changes moving from CPD to
interest in the use of warm mix asphalt is increasing CPR is that all construction products manufactured

L throughout Europe. Lower mixing temperatures and supplied in Conformity with an hEN require
A result in reduced energy use at the mixing plant both a Declaration of Performance (DoP) and
and reduced carbon emissions. However, in order CE marking information to be supplied by the
C
for customers to accept its suitability as a direct manufacturer to enable them to be legally
I
replacement for conventional hot mix asphalt, it placed on the market.
N
must be shown to provide at least the equivalent
H performance levels.
C
E
T
32
Graduation Ceremony
Paves The Way To Success
For Industry Professionals
A collection of 12 professionals who work
in the asphalt industry graduated in January.
4 Asphalt Professional • February 2013
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PRESIDENT’S VIEW
President’s View
At the outset of my Presidency I said There will be a focus on the ‘client side
through this column that my hope was that with a training day held at the University of
we would restore Asphalt Professional to Derby highlighting the asset management
a hard copy as soon as was practical. On of our highways, hopefully enabling more
behalf of Council I am therefore delighted awareness to those not totally familiar with
to welcome back our fi rst edition of Asphalt the ‘Black Arts’. The emphasis will be on
Professional of 2013 in a hard copy version. pavement construction, loading spreading,
This refl ects the hard work and commitment bond, stiffness, durability and ensuring no pot technology. Their names are published in this
put in over recent years. holes. Brian Downes the Chair of Education issue. Well done to you all!
has already had a very positive response,
In particular Arthur Hannah, our long and I am pleased to report the Branches are
particularly from the Midlands Highway
distinguished serving editor; who I know continuing to provide both social and
Alliance, who are keen to provide delegates.
is enormously proud to hand over a viable technical events. We are particularly
hard copy of Asphalt Professional to the Our Promotions Committee chaired by Chris pleased how the South Eastern branch has
incoming editor Pippa Birch. In addition Lycett is looking at events like this, but also re-activated itself over the past 12 months
the astute leadership of Ray Wood our Hon. how knowledge can be transferred to a having held a number of technical and social
Treasurer has ensured we have been able to wider audience, to this end he has already events. They will be the hosts of the National
balance the ‘books’ due to the past cuts in carried out videoing lectures. These may be Conference this year, to be held at the
expenditure and the good management of of particular interest to our members overseas Radisson Blu Stansted 27th – 28th June 2013.
our current funds. We will continue to work particularly in both Nigeria and Australia. So please look out for the booking form which
closely with Neil Levett of ALAD to ensure the will be available online. There will also be
future of the publication. You will of course Our website is functional but more effort will an opportunity for companies to book
still have access to an on-line format should now be put into to it to make it a site worth exhibition stands.
visiting not just for branch news but for a
you prefer it in that form.
Other branches continue to have a full social
wide range of information, either directly
In another change, the IAT has now and technical programme, which is a great
on our site or with helpful links to other web
consolidated its function and structures. I have credit to them for their hard work and time
sites. This will include pertinent and useful
great pleasure in welcoming Michael Atkinson put in in what we all recognise as diffi cult
information on CPR and CE marking. This
of Park Consultancy as our new Secretary to at times.
development will be on going through 2013.
the Council. He is currently co-opted onto
I am certainly looking forward over the next
Council and will be voted in fully at the next One initiative recently discussed is the
few weeks to attending, the Scottish Branch
AGM. I am sure Michael will make a valuable possibility that the IAT may be able to provide
Annual dinner, followed a week later by the
contribution to the effi cient running of the IAT. an audit scheme which could in some way
East Midlands Branch dinner, sandwiching
validate the competence and skills of small
We have come through a diffi cult 2012 with between them the Pennines branch training
to medium sized production/contracting
many changes in our industry that and a day and the Northern Ireland and Irish IAT
companies.
disappointing fall in asphalt volumes. This is conference. A very hectic fi rst week in March
set to continue for part of 2013 and although We have noted in the past that some but I am sure a very worthwhile seven days.
I do not possess a crystal ball, I certainly feel companies have unoffi cially used our IAT I wish good luck to all of these events and
there are indications that workloads and logo to imply quality. This of course we thank you to all the Chairmen and committee
volumes will start to recover before the end cannot condone. However if we can introduce members for the invitations.
of the year. a bona fi de scheme allowing endorsement
I also wish good luck to my colleague Dr Ian
this may be of interest to certain sections
The aim of the IAT is to continue to support all Lancaster who has recently taken on the
of the industry. This is an area that will be
training and educational needs of our industry chairmanship of the Pennines Branch.
researched further over coming months.
it can. In view of the major changes occurring
I hope you enjoy reading this issue of AsPro,
in our industry there remains an opportunity I would like to congratulate all the students
especially in its revived paper format.
for the IAT to demonstrate our value to our who last week were awarded their University
members, the industry and the client side Diploma in Asphalt technology and to those Jukka Laitinen FIAT
as a whole. achieving the University Certifi cate in Asphalt President IAT
Asphalt Professional • February 2013 5
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INSTITUTE NEWS
Scottish Branch
Report by Neil Anderson
Runway Resurfacing Project, Mount metres long, the main runway width is 45 metres.
Pleasant Airfi eld – Falkland Islands The concrete ends of the runway were defective due
to Alkali Silica Reactivity, one end had very severe
John Cook gave this very interesting presentation
concrete cracking some of the concrete was replaced
on the 30 October 2012. The original runway
and some cracks were repaired with epoxy resin.
had been constructed in 1983/84 and was all
new construction. Some 29 years later urgent The original grooved runway was constructed with
maintenance was required, the original Marshall a 1.5% crossfall this alleviated the build up of water
asphalt grooved surface had been sealed with which can lead to low friction. Grooving of the
slurry seals in the intervening period and this runway was considered essential to take the water
was now delaminating and causing a potentially away from the pavement.
serious FOD (foreign object debris) issue.
There were four principal organisations involved
John explained that the distance from the Falklands in this project: JFC (Joint Forces Command), DE
to the UK was of the order of 8000 miles. The base International –Projects, Mott Macdonald and Colas.
was currently served by a twice weekly schedule The key factors affecting design and construction
of fl ights from Brize Norton via an air bridge on were aircraft operations, remote location and the
the Ascension Islands. The island is also supplied weather. The runway was in use all week, the
regularly by two ships every month.
remote location had an impact on procurement and
the Specifi cation was infl uenced by the weather. The
The Mount Pleasant Airfi eld is situated approximately
30 miles from the main town of Stanley and most main runway work was divided into 7 phases with
of the road between Stanley and the Airfi eld is a crunch point at the intersection of the two runways.
unsurfaced. The landscape is very barren somewhat The remoteness of the site determined the project
similar to parts of Scotland. The main runway is strategy, planning began in 2008 and the project
Mount Pleasant Airfi eld 2600 metres and the secondary runway is 1500 was completed in 2011.
6 Asphalt Professional • February 2013
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INSTITUTE NEWS
The team works
on as the airfi eld
The scope of the project was to remove 50mm of Some facts for phases 1-6 are as follows: Zero delays
continues to operate
asphalt and overlay with SMA (taxiways) or Marshall to airbridge, medivac, compassionate and operational
asphalt (runways). It was not possible to use the fi eld requirements. Over 200,000 working hours
quarry that had been used previously and it was without a Lost Time Incident. 36Kms of trench ducting
decided to use a public works department quarry installed, 230m3 of concrete poured, 100,000 metres
at Pony’s Pass, samples were produced and sent of cable installed. 7500 tonnes of SMA, 18500 tonnes
to UK. This quartz tic aggregate was blended with of Marshall Asphalt and 12900 metres of pervious
coarse and fi ne natural sands from the UK in order asphalt mixed and laid.
to provide a close texture. The sand was shipped
As John explained this was a major project
to the islands in bags and stored under cover.
constructed in diffi cult conditions. The replacement
The Marshall asphalt mix proportions were of the surface course of the runway after 28 years
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‘‘‘‘‘‘‘‘
approximately 62% of local aggregates, 29% of service is a testament of the effi cacy of the original
aaaffffffeeeccctttiiinnnggg dddeeesssiiigggnnn
imported coarse and fi ne sand, 3% of limestone fi ller MOD specifi cation used and to the quality of the work
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and hydrated lime and 6% of 100/150 pen bitumen, carried out at the time. John’s presentation contained
which had been supplied in drum. A typical standard many slides and photographs which complemented were aircraft
compaction regime was used and the material was his description of the work. The Scottish branch is operations,
laid in echelon. The SMA comprised virtually all local very grateful to John for travelling to Scotland to remote location
aggregates. The pervious macadam protected French make this very interesting presentation.
and the weather
drains. Two asphalt plants were used; the main plant
had a 200 tonnes/hour capacity.
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INSTITUTE NEWS
Scottish Branch
Report by Neil Anderson
TS 2010 Surface Course Update and Lessons Learned
This presentation was given by Dougie Millar as an update of the work done in trials and the continuing
evolvement of the Transport Scotland surface course specifi cation. The initial trials were carried out on the
M8 and Dougie presented the results of the skid resistance which showed changes over the 21 month period
since the start of the trial. It was interesting to note that results of the four types of surface were all very
similar with scrim values in excess of 0.5, see graph below.
Figure 1
Results of skid resistance
tests over time
There are a number of Type Approval Installation Trials (TAIT’s) underway from the suppliers on the Transport
Scotland Network. Some of the lessons learned had been picked up during the annual inspection of Thin
Surfacing. The annual inspections which had taken place since 2008 were now showing a marked decrease
in defects for the survey carried out in 2012, see graph below.
Figure 2
Breakdown of defects
per survey year
8 Asphalt Professional • February 2013
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INSTITUTE NEWS
The Scottish Inspection Panel (SIP) introduced a new M90 Fife ITS (Intelligent Transport System)
failure category in 2010 recording the condition of Contract
joints. The surfaces were categorized by four defects: Dougie also showed some slides and discussed the
aggregate loss, binder fl ushing, miscellaneous and recent completion of the Fife ITS contract using the
joints. TS 2010 specifi cation.
Lessons learned through stage 1 of the TAIT process: The Contract was constructed on 3.2 Kms of existing
motorway. The three lanes were laid in echelon
(cid:31) Aggregate shape affects the voids attainable.
and there were no longitudinal joints. The work
(cid:31) The use of Gyratory Compaction provides a better was planned for 4 weekends with full closure of
understanding of the sensitivity of the binder the S/Bound carriageway, 3500 tonnes of TS 2010 M90 Fife ITS Contract:
content. SMA was laid over 2 weekends. 3 pavers laying in echelon.
(cid:31) Rutting requirements are met easily.
(cid:31) No issues on achieving the binder drainage
target.
Lessons learned through stages 2 & 3 of the TAIT
process:
(cid:31) Joints require to be side compacted and well
painted.
(cid:31) Handwork to be kept to a minimum.
(cid:31) Grit rate shall not be < 1.0 Kg/m2.
(cid:31) Rolling procedure; 3 point fi rst followed by
a tandem with grit then tandem fi nishing.
(cid:31) Avoid using cold material, ironwork can be
diffi cult.
(cid:31) Texture is extremely consistent.
(cid:31) Highly stressed sites require the correct nominal
size.
Many members of the audience had made
Dougie also set out how he thought the future contributions to the Scottish Pavement Forum and
would evolve with continuous improvement were aware of the how the TS 2010 specifi cation
TTThhheee sssuuurrrfffaaaccceeesss
as more material was laid. had evolved from inception. There is no doubt that ‘‘‘‘‘‘‘‘
wwweeerrreee cccaaattteeegggooorrriiizzzeeeddd
the introduction of this specifi cation has markedly
• Continue to monitor and record progress.
increased the longevity of thin surfacing in Scotland. bbbyyy fffooouuurrr dddeeefffeeeccctttsss:::
• Feedback to suppliers throughout the TAIT The presentation was given to a joint meeting of the aggregate loss,
process, SIP and the pavement forum. IAT with the IOQ and was well attended; only three
binder fl ushing,
slides from the many shown have been reproduced
• Improve specifi cation based on recorded data miscellaneous
above. The Scottish Branch of the IAT is grateful
and monitoring.
to Dougie for making this presentation which is and joints.
• Use more local aggregates once specifi cation invaluable in terms of his communication with
provides confi dence to do so. the industry and making TS 2010 work.
Asphalt Professional • February 2013 9
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IRISH CONFERENCE
IAT North/South Conference
THURSDAY 7TH MARCH 2013 EUROPA HOTEL, BELFAST
Since 2000, the IAT branches in Ireland; the Irish Branch and the Northern Ireland Branch come together
every 2 years to share experiences in an IAT North/South Conference. The Conferences focuses on issues
in road construction, maintenance techniques, innovative materials and solutions to common road
building and road research initiatives. This year the Northern Ireland Branch is hosting the Conference
at the Europa Hotel, Belfast on March 7th, The Conference will address road construction issues which
have come about following the economic downturn of recent years.
This is refl ected in the theme: Securing the Road Ahead in a Changing Climate
We have assembled eminent speakers from England, Scotland, Wales, France, Germany and Ireland to
discuss solutions to problems which are relevant when budgets are tight.
The Conference will benefi t personnel engaged in road construction and maintenance from National
Organisations, Contractors, Local Authorities, Material Suppliers, Consultants, Academics and Researchers.
We are confi dent that your attendance will be rewarded in a better understanding of the issues
involved.
You may book online (in GBP or EUR) at the following link:
www.instituteofasphalt.org/nsconference
03
13
Securing the
‘‘
Road Ahead in a
Changing Climate
10 Asphalt Professional • February 2013
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