Hindustan
Times ( 19 July ) carries a news report titled :
" BMC to test new materials to fix potholes
"
Report
goes on to say :
"
The BMC has identified five private companies , each of which will need to fill
50 sq meters of potholes on various roads. They will be using their own
technology on trial basis .
Sources said the five firms had given
presentations in which a ready mix of POWDERED
BITUMEN stored at normal ROOM
TEMPERATURE in
25 kg bags, could be DIRECTLY
POURED onto the potholes. Using this mix, potholes
can be LEVELED QUICKLY
and roads THROWN OPEN TO TRAFFIC IN 20 MINUTES....
according to these companies , their materials will work on
a WET SURFACE TOO "
I
am glad that someone in BMC managed to hack into my mail-box and downloaded my
following email to Shri Nitin Gadakari-ji :
-----------------------------------------------------------------------------------------
Sunday, 21 February 2016
Shri Nitin Gadkari likes to experiment and take the accompanying
risks
He is not afraid to stick out his neck for fear of it getting
chopped off
He is not paralyzed into inaction by " fear of
failure "
He like to tell his officers , " Forget the history -
what is your problem ? "
Then offers solutions such as :
* Logistic parks around big cities to decongest roads and
reduce pollution
* RFID sensor embedded vehicles , paying toll amount
electronically without stopping / needing humans
* E-rickshaws to be treated on par with petrol driven
rickshaws
* By passing Bharat V emission standards to directly jump
to Bharat VI standards for all vehicles
* Introducing hybrid model of financing for attracting
private participation in Highway construction
* Use of slag cement in construction of highways ( use of
waste by-products of Steel Industry )
Dear Shri Gadkariji :
Allow me to suggest use of " COLD ASPHALT " technology
for building new roads / filling pot holes
Use of hot asphalt requires a very narrow temperature range
within which it must be spread on roads before rolling
Any hotter and it will just stick to the roller . Any colder and
it just won't set
It is difficult to maintain such narrow range ( of temperature )
after asphalt carrying truck travels hundreds of kilometers - even when that
truck has a heating jacket ( consuming lots of fuel ! )
If solidified asphalt ( usually stored in steel drums ) is used
at the construction site , then it needs to be heated / melted locally (
usually by creating a wood fire ) - causing pollution and consuming trees !
And hot asphalt would just not adhere to a wet surface ,
rendering it useless for use in monsoon - especially for repair of pot holes
" COLD ASPHALT "
technology overcomes ALL of these problems !
* It consists of mixing water ( 90 % ) with hot asphalt ( 9 % ) in
presence of a specialty chemical ( 1 % ) , in a
very simple Mixing Machine which can be transported anywhere on a trolley
* This liquid mixture can remain stored in steel drums at ROOM
TEMPERATURE for over ONE YEAR !
* Drums containing liquid can be transported and stored at
road construction sites and COLD ASPHALT mixed
with sand / aggregates as and when required .
No ripping / destroying of drums and breaking of solid asphalt
* There is no need for ANY temperature control as mixture
/ aggregate can remain at AMBIENT temperature
* Since Cold Asphalt is basically water ( 90 % ) , it is
ideally suited for filling wet pot holes or laying on wet roads
* After laying / spreading , as soon as a heavy roller is
driven over Cold Asphalt mixed aggregate , chemical bond
between water and asphalt is broken due to heavy
pressure and setting process starts , causing the layer to
solidify .
Within a matter of MINUTES , regular traffic can
flow over the road ! or over the filled pot holes !
* Use of Cold Asphalt technology results in a HUGE COST
SAVING ( remember , it is 90 % water ! )
* Cold
Asphalt roads are much easier to repair , with no pollution , and very little
energy consumption
* Using Cold Asphalt technology, 3 machines ( leveler / spreader / roller ) can lay 1 KM ROAD IN A DAY !
* Using Cold Asphalt technology, 3 machines ( leveler / spreader / roller ) can lay 1 KM ROAD IN A DAY !
I have personally seen NATIONAL HIGHWAYS being constructed with
Cold Asphalt technology in France , way back in 1988 !
You may turn around and ask :
" With these advantages , how come our PWD /
Municipalities have not adopted this revolutionary technology ? "
My guess :
Because those responsible for drawing up tender documents ,
insist on use of Hot Asphalt !
And you know , why !
------------------------------------------------------------------------------------------------------------------------------
20 July
2016
www.hemenparekh.in
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