Under normal circumstances, a bitumen would need to be heated to relatively high temperatures (150°-180°C) to make it 'workable' on site.However, there are all sorts of reasons why such high temperatures may not be achievable or even desirable, the most common of which is that the mixed material will lose heat as it is transported from the batch
Under normal circumstances, a bitumen would need to be heated to relatively high temperatures (150°-180°C) to make it 'workable' on site.However, there are all sorts of reasons why such high temperatures may not be achievable or even desirable, the most common of which is
Flexible Pavements -Flexible pavements are usually bituminous pavements which have negligible flexural strength and transmit the stresses due to the wheel load in the form a truncated cone over a small area of the sub-grade, through the combined action of the various layers of the pavement.The load is transferred to the lower layers of the pavement
Rigid pavement and Flexible pavementCompositionFlexible pavement are composed of properly graded aggregate with bitumen/ tar as binder.Rigid pavements are constructed by using PCC- cement, aggregate, water and dowel bars (for joints).2. StabilityRigid pavementStrength depends upon interlocking of aggregates, friction and cohesion.Flexible pavementstrength depends upon the
Flexible pavements include simple seal coats. The seal coat in simplest form consists of a thin layer of asphalt combine with a thin layer of rock chips spread on top of it and rolled into the asphalt. As such, that can be at thin as 3/8 inch if you use really small chips. But
Soil conditions for Flexible pavements(FP) :1.The minimum thickness of the sub-grade is 500mm for NH and 300mm for SH as per IRC recommendations. Since the FP consists of four layers viz. subgrade layer, sub-base course, granular base-course, and surface course. And also, it needs a proper distribution of load transfer i.e grain to grain load transfer. Hence, a proper
Let me answer the first part , which is why.Flexible pavement( asphalt pavement ) is built in layers to perform its function , I.e, load transfer to the underlying layer economically.Economically?. Think of this asphalt is very costy material as compared to backfill soil and granular materials.