A critical review of commonly used bituminous paving mixes has attempted based on
Mix selection based on function and location within flexible pavement.
Capabilities of present day hot mix asphalt plants
Artificial Intelligence in Civil Engineering. hannan366
this slide is about to Artificial Intelligence in Civil Engineering, Artificial Intelligence method, the use of Artificial Intelligence in Civil Engineering, 3d printing etc...
I'm Irfan Nasir. Currently studying Civil Engineering at Mehran University of Engineering and Technology. This is a slide made by me on Defects in rails from the subject Transportation Engineering.
Rabine Paving America, a Rabine Group Company, has provided seven easy steps on how to implement a temporary fix for a pothole in your parking lot, pavement, asphalt, or other pavement type.
A critical review of commonly used bituminous paving mixes has attempted based on
Mix selection based on function and location within flexible pavement.
Capabilities of present day hot mix asphalt plants
Artificial Intelligence in Civil Engineering. hannan366
this slide is about to Artificial Intelligence in Civil Engineering, Artificial Intelligence method, the use of Artificial Intelligence in Civil Engineering, 3d printing etc...
I'm Irfan Nasir. Currently studying Civil Engineering at Mehran University of Engineering and Technology. This is a slide made by me on Defects in rails from the subject Transportation Engineering.
Rabine Paving America, a Rabine Group Company, has provided seven easy steps on how to implement a temporary fix for a pothole in your parking lot, pavement, asphalt, or other pavement type.
From a presentation at APWA - I used AutoCAD Map 3D to demonstrate various principles - they don't come across in the PDF. Maybe I'll post a video, or maybe video supplements.
In the actual presentation, I had a longer intro illustrating the value of place. I dropped the slides from this version as they would have no value without the talking. Again, maybe I'll make a video of that. I thought it came out well.
ENHANCING ROAD SAFETY MANAGEMENT WITH GIS MAPPING AND GEOSPATIAL DATABASEDr Wei Liu
Reliable and accurate data are needed in each stage of road safety management in order to correctly identify problems and risk factors and priority treatments, and to formulate strategy, set targets and monitor performance. Ongoing, data-led diagnosis and management of the leading road safety problems enables appropriate action and resource allocation. Data relevant to road safety are collected every day, but for these data to be useful for informing road safety practice, they must be properly coded and visualized, processed and analysed in a systematic way. With the road system management strategy switching from 3Es to Safe System, there is additional challenges and demand for the integrated use of various types of road safety data. In this paper, the development of an integrated road safety data management system is introduced. The road safety data management system consists of a geospatial database for storing, querying and analysing road safety related data including crash records, road safety deficiency records, carriageway, surfacing, geometry, skid resistance, signs and road marking etc, and a GIS mapping platform for visualizing and integrating different data sets. Data from a State Highway network is used to demonstrate the potential application areas of the information system developed, such as identification of crash hot-spots, development of safety intervention and safety management strategies, planning of minor safety improvement programme, and investigation of severe and fatal crashes.
This project is about tracking system that tracks vehicle using gps and gsm/gprs. Also, it displays information for user interface using web and mobile application.Beside that it displays information on lcd as a form of public notice board too.
After the onset of monsoons, development of potholes on roads and streets of India is a common phenomenon. Quite often, potholes are repaired with antiquated techniques such as placing soil or bare aggregate in the pothole because no hot mix asphalt is available during monsoons. But techniques are not reliable these days because they require large amount of time and the quality of repairing is also not up to the mark. Traditional pothole filling techniques take a lot of manpower and a lot of heavy machinery, which is an expensive process. Due to non-repairing of potholes on time many of accidents and traffic congestion takes place every year. In 2016, nearly 1,50,000 deaths were caused by road accidents in India. Out of these, 2,424 deaths in road accidents were caused by potholes. Apart from deaths, they cause several accidents leading to major and minor injuries, and delay in travel time Pothole is a failure in an asphalt pavement when there is water present in the underlying soil which weakens the supporting soil, and then traffic around affected area fatigues and breaks the asphalt surface. Failure in pavements takes place because of shearing, loading and deflection of materials. Which is the result of the action of traffic, poor support, and adverse atmospheric condition. In this paper different methods which are used for repairing potholes are described and best suitable method is selected based on the costing and quality parameters.
A Compatibility Study on Different Types of Cement and Plasticizerijsrd.com
It has long been a concrete technologist's dream to discover method of making concrete at the lowest possible water/cement ratio while maintaining a high workability. To a considerable extent this dream has been fulfilled with the advent of super plasticizers. It has added a new dimension to the application of admixtures with regards to production of high strength and flow able concretes. It is now possible to produce concrete with compressive strength of the order of 90Mpa (90 N/mm2). In the wake of energy conservation policy and diminishing supplies of high quality raw materials, there is a need to use marginal quality cements and aggregates for the production of concrete. In such instances the use of plasticizers/super plasticizers permits the production of concrete at low water/ cement ratios. We have taken ultra tech opc cement & coromandal ppc cement to find the compatibility by adding perma plast (plasticizer). The water cement ratio was maintained as 0.40 &0.45 for OPC & PPC respectively. To study the effect of these PP on various properties of concrete. The dosage of plasticizers/super plasticizers was measured as 1.5% for Perma plast for OPC & 1.3% for PPC by the weight of cement.
2. INTRODUCTION
INDIA has the 2nd largest road and highway network in the world. Yet, it is
better known for being one of the most pothole stricken road networks.
Pothole condition aggravates during the onset of monsoon.
This remains to be so, given the negligence and high investment to fix even
a small pothole.
Potholes do not just irritate drivers and damage vehicles, they actually kill.
The project involves the 3D-design and a scaled down prototype of a
pothole fixing unit which is aimed at reducing human effort and expertise to
patch potholes.
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3. What is a pothole?
A pothole is a type of failure in an asphalt pavement caused by the
presence of water in the underlying soil structure and the presence of
traffic passing over the affected area.
This failure is seen as irregularities or voids in the roads.
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5. Causes of pothole
Insufficient pavement thickness to support traffic in freeze or
thaw conditions without localized failures.
Insufficient water drainage.
Failures at utility trenches and castings (manhole and
drained casings).
Miscellaneous pavement defects and cracks left
unmaintained and unsealed so as to admit moisture and
compromise the structural integrity of the pavement.
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6. Methodology 6
Identification of
issues related with
pothole fixing
Selection of cold
asphalt considering
the advantages
Pothole survey to
identify common
size of small
potholes
2D hand drawn
sketches of top
view and side view
Development of
2D sketches into 3D
designs on
SolidWorks
Cost estimation of
Pothole Fixing Unit
Fabrication of
scaled down 1:2
prototype in wood
Testing and
rectification of
errors
7. Hot asphalt vs Cold asphalt
Hot asphalt is mixed around at 300 F, and paving, pothole repair and compaction
must be performed while the asphalt is sufficiently hot.
Paving and pothole repair is restricted to summer months in many states,
because in the winter the ground will cool the asphalt before it is packed to the
optimal air content, preventing proper pothole repair.
Cold asphalt is mixed and used at lower temperature than hot asphalt. In this
state, cold asphalt is easy to work, compact and repair potholes with, and is not
as viscous as hot asphalt.
A well designed cold asphalt takes on the properties of hot asphalt and is virtually
indistinguishable from it, despite being easier to use for pothole repair.
As proposed by Prithvi Singh Kandhal in his research article, the cold patching
mix is effective in mixed weather conditions and has a 78% survival rate of 4
years while field testing in the US under the Strategic Highway Research
Program.
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8. Advantages of cold asphalt mix
Ready for immediate use with pre-mixed aggregates (cold technology).
Cheaper while considering the equipment and labour cost.
No heating or mixing or additions to the product before or after application.
Requires simple equipment such as hand brushes, shovel and a rammer. The use
of a roller is not necessary.
No pre treatment of repair areas is required i.e. cutting out, use of tack coat.
Instant curing/setting, partly by air-drying and partly by compaction.
All-weather usage product. Instant repair of roads with Shelmac PR can be made
in monsoons & wet conditions, extremes of heat (60˚C+) and cold conditions.
Highly resistant to stripping by water, offer high skid resistance.
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9. Motivation:
Survey on pothole related incidents.
As seen in the image, the deaths
caused are much more in number
compared to deaths due to
terrorism.
This makes potholes one of the
biggest issues that need enough
attention and investment.
As of 2015, the number of deaths
have increased two folds.
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10. A simple survey
A simple survey was conducted
to determine the average size of
potholes in different parts of
Bangalore. It involved the basic
measurement of pothole
dimensions.
In conclusion, we found that:
• 80% of the potholes are within
the size of 3’ by 3’
• Average depth of potholes is
0.5’
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Measuring a pothole’s width
Measuring a pothole’s depth
11. Initial sketch 11
1 Trapezoidal storage tank for cold asphalt
2 Rammer bottom unit (20-25 kgs)
3 Rammer handle
4 Guide way for rammer
5 Cam to operate rammer
6 Motor to operate rammer
7 Regulator to control motor speed
8 Inclined guide way for flow of cold asphalt
9 Support for trapezoidal tank
10 Flap operated by lever to control flow of cold asphalt
11 Wheels with braking mechanism
Parts list
18. Working
A pothole of size within 3’ x 3’ feet is identified.
The pothole fixing unit is driven and parked above the pothole.
Basic cleaning of pothole is done using wire brush.
Cold asphalt from the storage tank is poured into the pothole in necessary
quantity using the flap control mechanism.
The cam-operated rammer is used to push and pack the cold mix into the
area of repair.
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19. 19
Cost comparison (Cold vs Hot)
A recent university study by James Bearden, shows a cost savings of 72% when using
EZ Street cold asphalt compared to hot mix asphalt repair.
20. Cost comparison :
Pothole fixing unit vs Python 5000
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• The design proposed will cost 60,000-70,000 while
produced in small batches and even lesser while mass
produced.
• While the fully automated Python 5000 costs 3,50,00,000
when imported to Bangalore.
21. Conclusion
The project involved the 3D-design (SolidWorks) and a scaled down prototype of a pothole fixing unit
which is aimed at reducing human effort and expertise to patch potholes.
A recent university study by James Bearden, shows a cost savings of 72% when using
EZ Street cold asphalt compared to hot mix asphalt repair.
By comparing the cost of time and materials for each product he was able to calculate the percentage of
cost savings.
In comparison to the more sophisticated methods available in the present day such as the Python 5000,
The proposed design is very economical, simple to use and employs cold asphalt mix.
There lies a huge potential for the future development of the design. For one, It can be modified as a
trailer attached to a bigger vehicle such as a Tractor or a Mini truck. This would create a new group of
sub-contractors to fix potholes and make the pavement patching process quicker especially in India.
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