TOPICS
Technical Support
Motto
of the Month
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Introduction
I have been a bit busy on other things, I do actually have a life away
from highways maintenance, so I do not have any particular current
topics or fresh news to raise in depth at the moment.
But I thought I would just ramble through a few items that
are worthy of thought, and have a bearing on the provision of a strong
soils and materials laboratory service, as part of the highways
maintenance and construction industry.
Soils
and Materials Laboratory, Technical Support
There have recently been reports in a number of publications that
relate to the production and distribution of sub-standard cement, from a
large manufacture, that may render the concrete produced from
the cement liable to an expansive reaction between cement alkalis and
reactive silica in the aggregate.
This situation was reported in NEW CIVIL ENGINEER of the 27/1/2005,
and I would particularly bring your attention to the inset item headed
"How could it happen".
Obviously this has a very serious knock on effect, possibly causing
early failure of concrete structures and significant expensive in
replacing concrete now, or at time earlier than had been predicted for
the life of the structure, or concrete item.
The problem is said to have been caused by "rogue staff". It
is not clear in the reports I have read if the "rogue staff"
that were alleged to have deliberately falsified certificates were
employed in a laboratory facility.
It could be that correct testing was being undertaken but being
presented differently by others.
However it stated in one publication that the production of substandard cement
had been happening for over two years. The article suggests auditing
of the plant, that did comply with current requirements, was
being done and yet it appears to be ineffectual.
I am of course making the assumption that this production plant did
have a testing laboratory.
It is also my opinion that this situation indicates that those
receiving cement for inclusion in their own manufactured products
should have laboratories and staff, or access to such laboratories, so
that they can test the incoming supplies.
If as suggested the period of
two years has been reported correctly, nobody involved in the concrete production chain can be too pleased with themselves.
I am an ex laboratory man, I know the benefits that such a
service can bring, I am therefore very disappointed in the way
these services are being utilised in relation to highways construction
and maintenance, or should I say not utilised.
When somebody tells me that it is no longer necessary to sample and
test because the supplier has procedures in place that warrant
testing by the customer unnecessary, I am unimpressed, and my experience
tells me to keep sampling and laboratory testing.
Another major example of not taking advantage of, or ignoring, good sampling and
testing procedures provided by a competent soils and materials
laboratory appears to be the A10 Wadesmill Bypass.
It would be nice to think that in the fullness of time a report will
be published on the "heave" of the stabilised components of
the road pavement so that lessons can be learnt for the future.
But, with what is known of the potential problems of sulphate bearing
soils in relation to in situ soil stabilisation, and the information
that is available in British Standards and Highways Agency
documents it would suggest that incorrect or insufficient laboratory
investigation was performed.
I do not like to believe that it was carried out badly or that it was
ignored for "commercial" reasons.
It would be encouraging to think that quite soon those in authority will
understand that an efficiently run suitably staffed laboratory facility
should not be seen as a cost to an organisation but a means of saving
a considerable amount of money.
Indeed such a facility should ensure that the money spent/invested in
a project is invested wisely so that the materials employed will give
long term performance, ensuring that it is a considerable time before
re-investment in the fabric of the project is required. This approach,
as well as being commercial good sense to the "owner" and
"funder" of the highway, has got to be regarded as
"Best Value" and "Environmentally Friendly", and
you achieve quite a few "points" for these parameters under
BVPI.
Traditionally these organisations were the government or the local
authority, but now with the longer term maintenance contractual arrangements I believe
contractors, or consortia of contractors and consultants, need to
reappraise there attitude to good soils and materials laboratory support.
It is likely that they wish to retain these contracts and it is
indicated that quality as much as price will be a deciding factor in
winning/retaining the work.
A further very serious point in relation to those employed in the
industry is that I personally would not particularly want
to be a civil/road maintenance engineer in a middle management
situation at the moment, without good technical support being available to me, and
the means of imposing that technical support.
The current situation where we have engineering middle management in
court facing manslaughter charges is not a good reflection on the
construction/highways maintenance industry, or a happy career scenario
for any engineer.
I appreciate this piece of text may not be particularly well crafted,
but it is written by a Materials Engineer trying to indicate the broad
concerns I have over the path the industry seems to be taking, and the
reduced amount of technical support that is being employed.
Perhaps one of the publications who seem to be reflecting this concern
would like to do a head count on how many true Soils and
Materials Engineers there are left in the industry, i.e. people with actual knowledge of road making
materials gathered over at least a ten year period and are active in
actual construction /highways maintenance work.
The above definition excludes "suits" with the title of
Materials Engineer who just quote all the recent accreditations and
certifications, or experienced Materials Engineers who have become
"management".
It is possible I am biased in my views, and given my background I will
have these opinions.
But I absolutely believe that the pendulum has swung far enough, with
regard to the reduction of technical support, and it needs to start its
return or it will crash through the side of the clock with dire
consequences, some of which may have already been experienced.
Finally it is evident to me that the continuing rise in the use of
this website, especially by some of the larger highways related organisations,
who frequent it on a daily basis and who I will not embarrass by
naming them, indicates there is a need for such technical guidance.
However if I ever thought the presence of this site and the
information it provided was influencing organisations to not provide in-house
technical backup and support, rather than promote the use of such a
service, I would cease publishing it on the internet.
The purpose of my website when it was conceived was to provide
information and guidance to individual technicians and engineers
working in the industry to increase their understanding of the
materials and processes that they are involved in, that prime
intention remains.
Motto of the Month
"It isn't
that they can't see the solution. It is that they can't see the problem."
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