Highway Maintenance and Rehabilitation

8/9/2019 Highway Maintenance and Rehabilitation

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Highway Maintenance andRehabilitationHighway Maintenance andRehabilitation

_____________________________________

Highway Engineering

_____________________________________

Highway Engineering

Espinosa, E.Espinosa, E.


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A. Highway MaintenanCE

- the preservation and keeping of each type of

roadway, roadside, structures and facilities as nearly as

possible in its original condition as constructed or as

subsequently improved the operation of highway facilities

and services to provide satisfactory and safe

transportation.

-- AAH!"


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Objectives

#. Highway programs and activities are measured by the

amount of e$penditures for construction of new

facilities and reconstruction of e$isting structure with the

aim of keeping up with the traffic demand.

%. &aintenan'E has its own role( by giving priority to local,

rural ) urban facilities particularly the paving )

rehabilitation after the contruction has been completed.

*. &aintenan'E is focused on the DO BETTERMENT

PROJECTS.


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Categories of MaintenanCE :

Road Surface

Shoulder and Aroach

!ridge

"raffic Services


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Road Surface MaintenanCE


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MaintenanCE Oerations re#uires:

#. +or Gravel Roads, blading and periodic reshaping or

resurfacing is a routine for periodic maintenan'E

activity.

%. +or Surface Treatment of low type bituminous

pavement, maintenan'E could be patching, seal coating,

remi$ing and relaying.

*. +or Slick s!"alt Surface# roughening, burning or non

skid seal is required.

. +or Concrete Road# maintenan'E could be removal

and replacement or filling of damaged areas.


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Shoulder and Aroach


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MaintenanCE of Shoulder and Aroach:

#. Sod S"oulders should be removed andperiodically bladed down to the roadway elevation to

avoid entrapment of water in the travelled way.

%. Grass prevent soulder erosion.

*. Gravel and Eart" shoulder should be maintained

by blading under favorable weather conditions.

. Ruttin$ and Settin$ the shoulder should be

corrected at once by reconstruction or resurfacing.


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Roadside

Conditions

$ngenious Machine %sed

&rainage


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Conditions for the MaintenanCE of Roadside:

#. f the roadside is full of /A, mo%in$

closer to the shoulder is the answer.

%. f the roadside has dry /A considered as

fire ha0ard, &urnin$ or !lo%in$ is the

solution.

*. f bushes cover the back-slope, trimmin$ is

necessary to maintain clearance and sight

distance.


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$ngenious Machine %sed:

a. Mec"anical Sod Cutter

b. Com&ined Seed ' (ertili)er S!reader

c. Po%er Mo%ers

d. Porta&le Grass Cutter

e. Bus" Mo%er

f. Bus" C"o!!er


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a.&echanical od 'utter


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b. 'ombined eed ) +ertili0er preader


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c. 1ower &owers


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d. 1ortable rass 'utter


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e. 2ush &ower


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f. 2ush 'hopper


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&rainage

' !he means of removing surplus water orliquid waste


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&rainage MaintenanCE:

#. Cleanin$of ditches, culvert, drop inlets and

catch basins to accomodate free flow of water.

%. Removal of sediments, branches and other

debris gathered at trash racks, culvert and structure

entrances.

*. Re!air of eroded channels and dikes.

. /iprap and bank !rotection to prevent

recurrence


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!ridge


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!ridge MaintenanCE: (

#. +or steel &rid$e structure, the routinemaintenance calls for cleaning by sandblasting,

flame or other means of repainting.

%. 'leaning and re-sealing of deck *oints that are

e$truded or filled with dirt.

*. /epair of drainage "andrails.

. /e-surfacing of rough or slicky deck surface.

3. 'orrect serious scour around the!ier ' a&utments.


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!ridge MaintenanCE: )

4. &ost bridges maintenance is considered s!eciali)ed%ork.

5. 'oncrete &rid$e decks normally deteriorate due to

deicing salts.

6. 'orrection is to remove the concret, clean the steel and

apply new materials such as!ol+mer concrete.

7. ometimes, seal-out overlay of as!"alt materials are

used as protective covering.


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!ridge MaintenanCE: *

#8. 'heck the &rid$e deckdeterioration by(

a. Applying waterproof membranes.

b. Applying late$ modified concrete.

c. mpregnating the deck with polymers.

d. 1assing electric current through reinforcing

steel.

##. f decks are dismantled, an epo$y coated reinforcing

steel may be used.


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"raffic Services


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"raffic Services

Maintenance oerations of highway includes thetraffic services li+e :

tripping is a continuing functions

/epair of road signs &aintenance of street and highway light and signals.

'oping up w9 emergencies.


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!. Rehabilitation


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,ave-ent Rehabilitation

- is an activity primarily to provide good riding and

skid resistance or to improve the structural effectiveness

of the pavement.

- :resurfacing, restoration and rehabilitation work,

restoring the original safe usable condition w9o addition to

the original capacity;


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Objectives :

Source : AASH"O

#. !o improve the smoothness of the road

surface.

%. !o e$tend the pavement life.

*. !o improve the skid resistance of the road.

. !o construct the sections with poor

foundations.

3. !o improve the drainage facilities.


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"he Efficiency of highway syste- could be

rated by :

#. ufficiency ratings.

%. Accident data.

*. kid tests.

. &aintenance report.

3. 1ublic comments and suggestions.


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Others :

a. /esurfacing

b. /estoration and /ehabilitation

c. 1avement &aintenance

d. ?efinition of terms


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Resurfacing

t is the addition of pavement layer over the e$istingroadway or bridge deck surface to provide additional

capacity.

@ote (

!he additional re-surface pavement should not be less than

%8 mm in thickness.


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Restoration Rehabilitation

!his includes (

#. /eplacement of defective oints.

%. /epair of spalled oints.

*. ubstantial pavement work

. /eworking or strenthening of sub-base.

3. /ecycling e$isting materials to improve their

structural integrity.

4. Adding under drains

5. mproving houlders

6. /emoving ) replacing deteriorated materials.


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,ave-ent MaintenanCE

!his refers to actions that are corrective or

preventive.

/econstruction - refers to the removal of e$isting

pavement and replacing them w9 a new pavement and under

course.

"verlays - could be either by 1ortland cement or Asphalt

concrete laid on an e$isting pavement.

/ecycling B means repeated use of e$isting materials

working on asphalt materials, portland cement or lime.


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/ecycling

enerally, recycling contribute to the stabili0ation of cost

conservation due to inadequate material resources and reducton

of energy requirements.

,A/EME0" REC1C2$03 is categori0e into (

#. !he type of materials to be used.

%. !he 1rocedure to be employed.

*. !he strucutural benefit to be gained.


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/ecycling

/ecycling procedures are as follows (

#> urface /ecycling

%> n place urface and 2ase /ecycling

*> 'entral 1lant /ecycling

,2EASE4 2E" ME E5,2A$0


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&efinition of "ERMS

Surface Roughness

- defined as irregularities in the pavement surface that

adversely affect the riding quality.

Surface &istress

- any indication of unfavorable pavement

performance or signs of impending failure, or any

unsatisfactory performance is a sort of failure


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Any type of distress that may be observed

includes any one of the ff (

a> 6racture associated with load and non-load

cracking.

b> &istortion is a permanent deformation of

faulting

c> &isintegration such as spalling, ravelling and

other failure of the pavement.


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SOME ,O$0"S "O REMEM!ER 77


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+or each &istress "ye4 the corresponding

damage, severity and locations are specified. All data

are gathered and indicated in the survey form as guide.

n case of Surface &eflection4 measurement in the

changes of the pavement surface level between the

loaded and unloaded segment is the basis for

rehabilitation design strategy.

?istress observations could be of static deflection,

steady state of deflection or by the impact load

response as determined by the ?ynaflect and +alling

=eight ?eflection respectively.


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C/+A'E +/'!"@ is determined from gathered

data identifying a pavement section having a low

coefficient of friction. !here are equipment available to

determine the skid number. t is measured a locked

wheel trailer or by the Daw

&ode !railer where the wheels are skewed in

accordance with the direction of !/AEF ...


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"HA08S M%CH6OR "HE "$ME

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for 2$S"E0$03999 .

HA,,1 ;OR2& "EACHER< =$0S"R%C"OR< &A199

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Highway Maintenance and Rehabilitation