Context :
Civic chief sees 5-year roadmap
for pothole-proof trips in Mumbai /
TNN / 12 July 2022
Extract :
“
The intensity of the downpour enables water to seep into the pores of
bitumen topping the road , thereby dislocating even the best surfaces. The only solution to this is
concretising every kilometre of road surface
The
possibility of getting a pothole on a concretized roads is almost reduced by
90 per cent, I feel . Therefore we have
drawn up a master plan of concretizing all roads by 2027 – 28 “, said Chahal
A
concrete road usually has a longer life (15-20 years) but requires almost double the time needed to lay an Asphalt road.
Cost
is 300 times more as it involves laying a new drainage line alongside, plus more
men and material
Context :
Make Civic Engineers Accountable For Potholes,
Say Ex-corporators | Mumbai Information / 13
July 2022
Extract :
A day after BMC
commissioner I S Chahal ( mc@mcgm.gov.in )
blamed the
“brutal” rain that batters the town yearly for the deteriorating situation of
roads, former corporators retorted that enough
supervision by civic officers at each stage
would guarantee the town will get good roads that last
Additional Municipal
commissioner P Velrasu,[ amc.projects@mcgm.gov.in ]
in charge of the civic roads division, said
the issue was with the asphalt roads constructed in the past.
However,
Velrasu pointed out that if concrete roads
develop potholes, there’s a big problem
“ We need to ensure that at every stage of constructing
concrete roads, adequate time is
given for mixing and curing. This would ensure that in the long run the city gets good
high quality roads,” he stated.
Context :
Extract :
Based
on the initial
cost of
the pavement, concrete
roads are reported to be over 20 % costlier than asphalt roads. However on
life cycle cost basis, concrete roads are estimated to be around 20 – 25 %
cheaper than asphalt roads
Whereas
asphalt is still less costly as compared to concrete, Asphalt
dries faster hence it takes less time to build an Asphalt road as compared to a
Concrete road
# REPAIR
Concrete
roads do not require frequent repair for patching work like Asphalt roads but if the Concrete road
breaks, the whole slab needs to be
replaced.
On
the other hand, Asphalt
is a CHEAPER
and FASTER
solution for short term projects
# MAINTENANCE
Concrete
roads are maintenance-free, or we can say they require very minimum maintenance
if they are laid properly
In
contrast, maintenance of Asphalt roads is easy or we can say they
require very minimum maintenance if they are laid properly
# POLLUTION
Asphalt
produces lots of high polluting gases at the time of melting it for paving –
also petroleum is required to produce asphalt , which is an expensive product
{
My observation > Isn’t Asphalt, a by-product of petroleum refining ? }
===================================================
Dear Shri Chahal,
I urge you to get the experts at the Indian Road Congress to examine the feasibility and economics of using COLD ASPHALT , as suggested in my following 6 YEAR old email :
Ø Keep
Experimenting ……………………………[
21 Feb
2016 ]
Extract :
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 kilometer - 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
No ripping / destroying of drums and breaking of solid asphalt
* There is no need for ANY temperature control as mixture / aggregate can
remain
* 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
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 ( leveller /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 !
With regards,
Hemen Parekh
/ hcp@RecruitGuru.com /
13 July 2022
Related Readings :
Ø POT
HOLES ARE FOR EVER ? ………………………………..[ 11 July 2016 ]
Ø Cold
Asphalt is THE ANSWER………………………………… [ 19 July 2016 ]
Ø POTHOLES
CAN BE BANISHED………………………………. [ 23 July 2016 ]
Ø Nitinbhai,
there is a BETTER/CHEAPER alternative …[ 07 Apr 2021 ]
Go Green Road Repairs
Ø Cold Asphalt Mixes for Indian Highways Environment Friendly
Technology
Ø Cold Mix Asphalt Market 2020 Global Share, Growth, Size,
Opportunities, Trends, Regional Overview, Leading Company Analysis, And Key
Country Forecast to 2026
Ø What is the difference between Hot Mix and Cold Mix Asphalt ?
===================================================
Indian Road Congress
Contacts :
admn.irc-morth@gov.in
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