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became o. my a small presentation is just uh try
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to focus a you're a tension on uh
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a durability not just uh as a matter of full feeling good
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a specification or a. c. marking something like that
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but uh also in terms of uh uh
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not only in terms of in excess but also in terms of performance test and
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uh uh in terms of risk assessment of the product as a
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as uh will uh to lease a goal um i've uh i've chosen to
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tell you something about an application uh for protection
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in a a damn sandwich or worse
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it is very uh clear and say uh evidence that
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uh the main uh uh and uh traditional
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a function of a a just text fell in the winter
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tech still in uh uh such kind of application is
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protection of course uh and uh uh it is
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also a high i didn't that's one
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of the joys expose the durability comes to be a any very important uh issue
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and uh so the the point is
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a traditionally uh i yeah
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i think in terms of i and i say traditionally because i think just in that exchange text as are not an innovation anymore
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yeah as as such so i think the traditional uh
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an air occasions uh in addition forever functions and
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original uh in the traditional approach of the designers
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is uh about a function about a protection
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mainly during the installation time which of course is uh still remains the most critical time
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in the in the in the life of a lot of it was just synthetic
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and uh okay some other minor or or compliment complimentary functions
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like a a kind of bridging and sometimes a drainage
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uh but uh more and more important uh is uh the
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occasionally it's kind of feel of uh mm composites made with uh you
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what people can layer uh typically be seems kind of application ah
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uh already lined in the in the factory with the
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knowledge of textiles and uh uh this a solution
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enables the of course to save a lot installation costs which is
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well it's a an important issue and uh it's getting a
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better dimensional stability to the b. b. c. membrane
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and uh improving uh it's mechanical performance and uh
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uh um so and is giving up
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i'm i'm i'm i'm much better uh safety for
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the long term performance of the membrane itself
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but it brings a then uh it farther problem uh uh compared to the
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usual uh installation with the the two layers because you have to take into account
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to all uh the interaction between the age of textile indigent membrane and uh
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usually if that would be see a membrane p. d. c. is not uh electrically
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a friendly with the whole problem so online inc
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uh is uh is not uh that easy
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and uh you have uh to take into account uh some uh other or problems
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like uh the matter of the annotation attention must be good of
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course because you have a slow when you want a the
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it too much you just to stay together but you also it but it cannot
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be too strong because uh it is necessary during the installation sometimes too
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to peel and uh because uh uh you have to cut uh you have to well the the of two for all
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the a. b. a. d. angle so and the uh customise the the the the product to the to the site
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so you it it's you have to you needed to have the possibility to
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to peel and uh possibly having no remaining of fibres
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into the p. d. c. because they eh
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the specific weight of the two of polymers uh is different and by welding gear of course you
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reduced to a liquid state and uh i would probably would of float over the p. c.
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making a film that uh with the uh might make a lot of troubles in a in a welding
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so uh but these are a little more than simply they eh
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you'll be let's say okay i skip about the traditional uh uh um tests uh
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you have to carry on a on a mature for protection and uh um
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i want to
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um we drive your attention on the fact that durability
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brought these are sometimes underestimated how because i
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sometimes uh it when the designer knows this year will be covered
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where they don't think in the long term durability is uh an important issue but uh uh i will show
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you that uh uh sometimes this is uh not the case and uh as a part of uh
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reese assessment uh in your project uh it would be good to take into account
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the durability even if you think you're going to cover the material yeah
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in a in a in a short term or according to the to the program it should be a covered with a short time
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so uh uh
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again durability of course uh maybe for your to the eh
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european how my stands durability is always consider at
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an essential property but uh it's a
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the way it is treated in a in the standards is uh uh just if you take they
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you missed abilities just to determine the time needed
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before the big rotation processed the starts
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and uh it it doesn't say anything about uh the the the diagram a offer
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the degradation after the depression the correlation starts so uh you could have a
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good the product that you can state uh thirty days a
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exposure before starting any degradation process but then uh
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how long will it really trial last uh in the e. demands for years to come
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so which i take a uh this case history uh
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to uh uh explain uh this uh uh
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point of view and the uh the the it is a case uh in uh
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in the space and probably the houses are rather sunny place the the
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mm average uh irrigation rate is a hundred and sixty chloe industry or the average
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of of europe for multiple always hundred and twenty so all of it so
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but in this case in the the project that was uh uh uh what the
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plan was to cover the material with uh some uh uh stones rather quickly
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i show you a here which says this is a very simple
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diagram that is coming from as sixteen years of uh
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a measurement about the uh the probation on the roof so measuring uh uh the full
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spectrum of a radiation and the u. v. and uh uh setting get uh from
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uh i. b. empirical uh findings uh the the uh the correlation rate to in this
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case is a for a five hundred uh uh grants a bully problem material
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the and the actual these because this has been the uh
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the one chosen for these camper bay project the protection
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in uh in the in the specific case uh uh the protection was
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intended uh both on a on both sides of the membrane
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and both sides i've been a a lined uh
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in the factory so prefabricated the because
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the lower side where your c. d.'s all pole yes that one grams
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was intended to get to your protection during installation against the supposed
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to be smooth the slope of prepared by the contractor
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though all the upper side had to or protect the
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the the membrane from a bay it rocks
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for link from a certain height uh for the covering all of up the slopes of other sever
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so well you see here the or placement of the course doubles
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but there is about and here comes the the the matter with the this the risk assessment that was mentioned
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for some uh uh not technical reasons sake
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economical bureaucratic stuff the the project had to be stopped after
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they installation of the uh of the membrane and
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before the the the covering with the with the rocks
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so uh the owner was extremely worried about
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the performance uh all uh all of the material eh
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and they didn't know how long this work ethic uh a problem was going to last
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so uh uh they asked of uh for uh an assessment of the durability
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even if everybody was not required in in the specification at all at the beginning
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but the uh actually the the material chosen uh i was uh
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good enough to exceed the eh specifications by about thirty percent
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and i mean the mechanical specifications so uh
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with the use of of this simple oh a diagram you you would you have
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xena earlier we have been able to calculate ah how many
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hours of your the asian what a well needed to
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reduce the performance by thirty percent so the to stay within
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the limits of the specification of problem mechanical performances
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and uh uh this has been calculated uh in about a seventy days
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uh and uh uh so seventy days as being the deadline uh we have given today installer
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if you if you are are able to solve your regretted problem within seventy base
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it will work you will have no problem if you will have a a longer uh uh a period
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where you have to think uh about a couple of things for example to reduce the height
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uh from which you are dropping you stole so that to reduce
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the the the energy uh uh impact incubator just pack spell
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or you have to think about a sacrifice will uh layer to protect
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uh the the existing or a material it would be very costly solution
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likely they could solve the problem within the seventy days but the
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release seventy days they have been able to a sleep per
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a a better more rest things or sleep
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uh huh that's back
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so uh coming directly to the conclusions
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so they're a high reliability of the procedure membranes sealing systems for them
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sandwich errors can be improved and reassured by evaluating the durability aspects
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all the you just expense uh due to the interaction with the protection to textile and environment
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of course uh i i just get the the the the point about evaluations about uh actually the of the silence
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kind of things which i think uh it i give a
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bi yeah as as i shoot and uh um
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of course it does must be observed that uh the
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letter to test alright important about uh indicated
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and not sufficient to forecast precisely the service live in connection to weather
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so will the era or the hope ah yes pressing is that that more studies
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we'll uh fox the correlation between leveraged past performance test on the field about durability
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and uh but in the meantime i i would recommend everybody to minimise
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the risk for your project choosing a durable i uh material

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Conference Program

Introduction and coordination of the presentations
Daniele Cazzuffi, IGS Past President CESI SpA, Italy
April 6, 2017 · 2:06 p.m.
144 views
The contribution of geotextiles to the global sustainability agenda
Russell Jones, IGS President Golder Associates, UK
April 6, 2017 · 2:10 p.m.
186 views
Q&A The contribution of geotextiles to the global sustainability agenda
Russell Jones, IGS President Golder Associates, UK
April 6, 2017 · 2:28 p.m.
The behavior of earthworks with geotextiles after several decades
Jean Pierre Gourc, UJF Grenoble, France
April 6, 2017 · 2:31 p.m.
106 views
Q&A - The behavior of earthworks with geotextiles after several decades
Jean Pierre Gourc, UJF Grenoble, France
April 6, 2017 · 2:51 p.m.
New Horizons for Nonwoven Applications in Geotextiles
Pete Stevens, Terram Solutions Sales Manager, Berry Global
April 6, 2017 · 3 p.m.
206 views
The role of nonwoven geotextiles in geosynthetics and key global markets and trends
George Papagiannis, Sales & Marketing Manager Thrace Nonwovens & Geosynthetics, Greece
April 6, 2017 · 3:30 p.m.
125 views
Q&A - The role of nonwoven geotextiles in geosynthetics and key global markets and trends
George Papagiannis, Sales & Marketing Manager Thrace Nonwovens & Geosynthetics, Greece
April 6, 2017 · 3:38 p.m.
Correct design and proper applications of geocomposite drainage systems for landfills capping
Piergiorgio Recalcati, Technical Director Tenax SpA, Italy
April 6, 2017 · 3:41 p.m.
205 views
Conclusions
Daniele Cazzuffi, IGS Past President CESI SpA, Italy
April 6, 2017 · 4:01 p.m.
128 views

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Conclusions
Daniele Cazzuffi, IGS Past President CESI SpA, Italy
April 6, 2017 · 4:01 p.m.