TURAPAN LENTUR

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering





Concept Cold mix asphalt




• Cold mix asphalt is a combination of mineral aggregate and emulsified or cutback
asphalt with additives.

• The use of cold mix asphalt is usually limited to relatively low-volume rural roads.
• Cold mix asphalt pavement usually requires an overlay of hot mix asphalt or surface
treatment to resist traffic action.

• The components of cold mix asphalt can be mixed at a central plant or in-situ with a
traveling mixer





























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Civil Engineering Department | DCC3113 : Highway & Traffic Engineering





Concept Premix Temperature (Before Rolling)


















































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Concept Rolling




• Premix Compaction
– Consists of:

• Breakdown/initial – smooth wheel, <5km/hr
• Intermediate/principal – pneumatic, <8km/hr, weight ≥15 ton, tyre pressure ≥
0.7N/m 2

• Final – smooth wheel, eliminate irregularities, tyre tracks

– Temperature at the commencement of rolling ≥110˚C.
– Operate longitudinal direction with driven wheels towards the paver, lower to higher
edge.

– Passes overlapped half width of the roller.
– Construction joint cut back straight, brushed on with RS-1K 10-15 minutes before
laying of next section, no joints along wheelpaths.

– Rollers, heavy vehicles shall not be allowed to stand on newly laid mix before
compaction completed and thoroughly cooled & set.













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Concept


















































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Concept


















































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Concept


















































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Concept


















































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Civil Engineering Department | DCC3113 : Highway & Traffic Engineering





Concept Smooth Wheel Roller


















































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Civil Engineering Department | DCC3113 : Highway & Traffic Engineering





Concept Pneumatic Tyre Roller


















































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Concept Paver




 Dump truck transfer the premix into the paver’s hopper (a).
 The conveyer carried the premix from hopper (a) to auger (b).




















a


b
















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Concept Wearing Course


















































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Concept Construction Plants


















































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Concept The construction of road shoulders




Road shoulders are important element of highway system. The functions of a road shoulder
are;
• It prepares a flat support to the road pavement.
• Drains the water surface to the road side drain and avoid humidity from diffusion.
• Provides space for traffic users to stop by the roadside of the road and also for
emergency lane during overtaking, especially on the one way street road.

• Provides lane/ path for pedestrians and cyclists
• Provides space for traffic signs and guard rails.




























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Concept Pavement Works - Shoulder




• Consists of furnishing, compacting & shaping earth, gravel, or paved shoulder.
 Paved – constructed as normal bituminous layer
 Gravel – using approved material for gravel surfacing
 Earth – using suitable material as described in earthwork section
• Thickness of each layer according to the drawing, based on material used and
compacted to the required min. density.

• Top level of shoulder should be level and flushed with pavement and uniformly free
draining away from carriageway.





























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Concept The purpose road shoulder




The purpose road shoulder design is:

Safety
• It can provide a factor of safety for road user who accidently
• To provide sealed pavement area on the roadside.
• Provide space for vehicles to stop during emergency.

• Improved sight distances

Structured
• Protect the sealed pavement from excess deterioration.
• Support side of the road pavement

Recreation
• Increased roadway width to accommodate agricultural
• Vehicles for cyclist














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Assessment Assessment




• Check your understanding and knowledge by completing the following questions.


• There are 6 questions in this assessment. After you answer all the questions, the result
screen will show your total score.


• You will require a score of 80 % or more to pass the assessment.


• Click on the Start button to begin.



















START





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1 2 3 4 5 6 7






Label the layers of the flexible pavement roads given below.











































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Write down the short notes about the functions of each layer of the flexible pavement.








SURFACE__________________________________________________________

___________________________________________________________________

___________________________________________________________________

_________________________________________________





ROAD BASE________________________________________________________

___________________________________________________________________

___________________________________________________________________

_________________________________________________







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What are the differences between base course and wearing course in the surface

layer?









































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Describe briefly the construction of road surface.









• ______________________________________________________________________________


• ______________________________________________________________________________



• ______________________________________________________________________________


• ______________________________________________________________________________


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State FOUR (4) methods for the construction of road base course in flexible pavement











































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State FOUR (4) adventages of using flexible pavement in Malaysia











































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Describe the functions and application of prime coats during road construction of
flexible pavement









































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Civil Engineering Department | DCC3113 : Highway & Traffic Engineering







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Summary





COURSE LEARNING OUTCOMES (CLO)

Upon completion of this course, students will be able to:-
CLO 1 : Comprehends and applies the fundamentals engineering concepts of highway and traffic engineering and related act in
Malaysia.(C3, PLO1) (C3,PO1)


CONTENT




3.1
Understand
the UNIT 3:
3.1.1 Describe about the flexible pavement construction
of flexible
3.1.2 Explain preparation of materials used in the pavement CONSTRUCTION OF
a. sub base FLEXIBLE
b. sub road PAVEMENT
c. road surface
3.1.3 Discuss the construction of road:
a. Sub base
b. Base
c. Surface
d. Shoulders
3.1.4 Identify priming work in flexible pavement



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