Problems faced
a.Various types of surface cracks, full
depth cracks, potholes in PQC
(concrete pavement), which were
difficult to repair by using conventional
methods.
b. Surface levelling at nose-wheel area
of bay.
c. Continuous complaints from maintenance
staff of all airways.
Previous solutions by MIAL
A. MIAL was repairing cracks, potholes,
full depth cracks in PQC by using conventional
repair products like different
types of epoxies, cementitious products
and finally bitumen. However, these
materials lead to:
1. Time consuming: It was necessary
to shutdown the taxiways, aprons and
bays. This was causing several inconveniences
which need minimum 6-10
hours depending on the products.
2. Frequent need of repair: Epoxy and
bitumen materials do not last for a number
of years or even months and this
was calling for frequent repairs, leading
to frequent shutdowns.
3. Maintenance cost: Additional maintenance
cost in terms of monetary, man
days due to frequent repairs.
4. FOD's: Maintenance staff of Airport
always scared about foreign objects
which generate from erosion of Repair
Material used or form the Pavements,
which might goes into aircraft's Engines
& create major problems.
B. Replacing damaged/cracked
PQC by normal concrete: Too time
consuming and costly affair, as, at
the airport, time is money i.e. just
to replace one bay with normal concrete
it will take minimum 60-90
days which will cost `1-1.5 lakh per
panel and revenue loss to airport
a minimum of `5 lakh per day per
bay (landing, parking, housing
charges etc.).
Proposed solutions by
Choksey
Delpatch (elastomeric concrete) is
the reliable solution provided for the
repair and rehabilitation of full depth
cracks, potholes, nose-wheel areas.
Elastomeric concrete is an excellent
patching material. It provides an
easy-to-use solution in retrofitting
airport runways with lighting. Most
importantly, elastomeric concrete
lasts for more than 10 years
therefore it does not call for frequent
repairs or shut down.
A. Delpatch: A long-term solution.
Elastomeric concrete has been used
worldwide as taxiway repair material
and has a proven track record of lasting
more than 10 years. All types of cracks,
potholes, edge spalling in pavement
have been satisfactorily repaired by
using elastomeric concrete at MIAL.
B. Delpatch: A strong material. Elastomeric
concrete though elastomeric
does not melt or change surface level
like bitumen.
MIAL faced major problem at
nose-wheel base of surface level
change due to heavy tonnage of
taxi-nose (weighing more than 150
tonnes). Since elastomeric concrete
has been applied, this particular
problem is solved permanently.
Elastomeric concrete gains
extreme hi-compressive strength
after curing and therefore it does
not change by level or volume, neither
has it shrinkage problem.
Benefits of Delpatch
Releases traffic in one hour: This minimises
expensive downtime and allows
the traffic usually within one hour after
final pour.
High load bearing capacity: Handles
the weight of 777's (it's designed to take
a load of A380 type aircraft) and heavy
truck traffic.
Outstanding anti-spalling properties:
Elastomeric concrete is a longterm
solution for high performance
pavement.
Excellent adhesion to concrete
and steel: Laboratory tests of
elastomeric concrete gives excellent
results in tensile strength and
elongation at break with concrete
and steel.
Impact resistance: Under bitterly cold
conditions elastomeric concrete withstands
heavy impact, unlike epoxybased
materials and concrete which
shatter when hit.
Compression deflection: Elastomeric
concrete can handle heavy pressure
before deflecting and its memory allows
it to return to its near original state after
deflection. (This means it can also take
care of movement up to a large extent.)
Chemical resistance: Elastomeric
concrete resists commonly used
chemicals such as ethylene, glycol,
freon, silicon grease, sodium chloride,
mineral oil etc.
Ease of installation: Elastomeric concrete
is self-levelling and has a rapid
cure time.
Conclusion
A repair job was successfully completed
at many places in last few years and
till date it is performing effectively.
Delpatch remains the fastest quick
concrete pavement repair product
and successfully tried at Gun Carriage
Factory in Jabalpur; Hugly Metcoke
Power Plant in Haldia; BHEL -
Bhopal; airports - Mumbai; Jaipur,
Delhi and Kolkata; many NHAI road
projects; MMRDA and MSRDC road
projects etc.
Contact: Choksey Chemicals Pvt.
Ltd,
Infra Project Division,
111, Industrial
Area,
Sion (E), Mumbai, Maharashtra
400022.
Toll Free: 1800-220-474
Email: contact@chokseychem.com
Website:
www.chokseychem.com
Untitled Document
ADVANTAGES OF ELASTOMERIC CONCRETE OVER OTHERS |
| Description |
Epoxy-based Mortar |
Fast Setting Cementatious Compound |
Delpatch - Elastomeric Concrete |
| Technical properties: |
| Resilience Properties |
Nil |
Nil |
Excellent |
| Impact resistance Ball Drop test |
Very poor |
Poor |
Very good impact resistance (because of flexibility
in nature) |
| Flexible |
Very poor |
Poor |
It can deflect up to 30 per cent, and will regain its
original shape after release of loads. |
| Abrasion resistance |
Yes |
Up to some extent |
Very good abrasion resistance. |
| Chemical resistance |
Yes, up to some extent |
Poor |
Very good chemical resistance |
| Fuel resistance |
Poor |
Up to some extent |
Very good all type of fuel resistance |
| Practical Properties: |
| Curing |
Doesn't required curing by water |
Curing by water is must, otherwise it
develops cracks |
Doesn't required curing by water |
| Time required to allow traffic |
6-16 hours |
12 - 24 hours |
After one hour |
| Paintable |
Yes |
Yes |
Yes |
| UV resistance |
Poor |
Good |
Very good |
| Water impermeability |
Good |
Poor |
Very good |
| Economy of the product: |
| Lifecycle cost |
Will be high as need to repair frequently |
Will be too high as need to repair frequently |
Lifecycle cost will be much cheaper than any other
material |