Construction of Bituminous Concrete Road,work methodology & Procedure, Asphalt road,

#bitumenroad
#roadwork
#PrimeCoat.
#Bindercourse.
#Tackcoat.
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Hiii friends in this video you will learn the methodology for Bituminous /Asphalt road construction:
In-Process Procedure:
The execution procedures shall be divided into following sections, which are:
a) Prime Coat.
b) Binder course.
c) Tack coat.
d) Wearing course.
a) Prime Coat:
Quality of Primer should be as per BS1707 or 1S:217, IS: 454 and IS: 8887.
Immediately before applying the prime coat (which shall be preliminarily approved), the full width of the surface shall be cleaned with compressed air.
i) The bituminous material for the prime coat shall be applied by means of bitumen spray tankers.
ii) This shall be applied in a single layer at the rate of 0.7 - 1.5 liters /sq.m and at a temperature not exceeding 70″ C. This surface shall be cured for 24 hours.
iii) The over spread area shall be cured more than 24 hours/ until excess prime coat is evaporated.
b) Binder Course:
Quality of Binder should be as per AASHO-T182 or IS: 73, IS: 217,1S:454 and IS: 8887.
i) Immediately before paving the binder course material, the surface of the prime coat shall be cleaned with compressed air and shall be ensured that the surface is dry.
ii) The hot asphalt mix shall be brought from the mixing plant by 6 wheel trucks or trailers. Upon arrival at site, the asphalt mix shall be dumped into the asphalt paver.
iii) The asphalt paver shall lay the material to the required thickness and level.
iv) The mix shall be compacted as soon as possible after spreading the material. Tandem rollers shall follow the laying operation to carry out breakdown rolling up to temperature of 110- 120″ C. Pneumatic tired rollers and tandem rollers shall follow the breakdown rolling and sufficient passes shall be made to achieve the required compaction.
Rolling shall start from the sides and proceed toward the center. Each trip of the roller shall overlap the pervious trip by at least 30 cm. Roller wheel shall be kept moistened. The roller shall be capable of reversing without backlash and shall be free from worn parts.
Heavy rollers shall be used to complete all rolling including elimination of waves caused by the lighter rollers. Full compaction shall be obtained before the asphalt temperature reaches 100° C. Compaction shall be in accordance with specification of relevant standard.
v) The construction joints shall be prepared by cutting the layer vertically down by means of asphalt saw cutting machine or with jack hammer. The joint shall be cleaned well by compressed air and tack coat material shall be applied on the vertical and horizontal surface for better bonding. Extremely good care shall be taken when asphalt is laid at construction joints.
vi) The areas inaccessible for heavy rollers shall be compacted with plate compactors or hand tampers. After reaching the base course top level, suitable fill material (dune sand) shall be dumped to the top level of base course on the sides of road shoulders. It shall be leveled, shaped (1:6 ratios) and compacted to 90% maximum dry density.
c) Tack Coat:
i) The material (which shall be primarily approved) shall be applied at the rate of 0.3 to 0.6 lit/ sq.m at the temperature not exceeding 54 °C above the binder and at where there is a joint with existing asphalt surface.
ii) The surface shall be cured for the period as per manufacturer’s recommendations until a tacky surface is visible.
d) Wearing Course:
i) The hot asphalt mix shall be spread over the cured surface of tack coat by automatic asphalt paver to the required profile and thickness.
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Tags:- Bituminous Road, Construction of Bitumen road, Asphalt road construction, methodology of road construction, Wearing course,thickness of road,DBM road, Bituminous concrete, Procedure of road construction, Approach road, Waterproof membrane, Civil engineering,

[@ajaybhandari7499]

Informative .

[@NavneetVideo]

Thanks..Pls do share 😊

[@ramachinzah854]

Thanks..It mean alot.

[@kotivadlamudi5798]

How would we take compaction coefficient for road
For example our required thickness is 70mm then how much thickness put before compaction

[@muthukumaransk8669]

DBM and BC rolling pattern ?

[@radin101]

Thanks for the good video. However I do not understand this one part at 2:24 - 2:36, what does that step mean?

[@user-bs2ck9mj4q]

It means after finishing ashpalt road you will dump the shoulders on to side of this road 1-2metre to prevent from cracking of Road from wide side