Tack coat – emulsified asphalts vs cutback asphalts, Civil Engineering

Assignment Help:

Tack coat - emulsified asphalts vs. cutback asphalts

Emulsified asphalt is a suspension of asphalt in water by employing an emulsifying agent that imposes an electric charge on asphalt particles so that they would join and cement together. Cutback asphalt is simply asphalt dissolved in petroleum. Purpose of adding emulsifying agent in water or petroleum is to decrease viscosity of asphalt in low temperatures. 

Colour of emulsion for tack coat is brown initially at the time of application. Afterwards the colour is changed to black when asphalt starts to stick to the surrounding and it's described as 'break'. For emulsified asphalts, when water has all evaporated, emulsion is said to have 'set'. Cutback emulsion is described to have been 'cured' when solvent has evaporated. There are numerous problems associated with cutback asphalts:

(i)  Emulsified asphalt can be diluted with water so that a low application rate could be achieved.

(ii) Evaporation of petroleum into atmosphere for cutback asphalt poses environmental problem.

(iii)Cost of production of petroleum is higher than emulsifying agent and water.  

1841_Tack coat – emulsified asphalts vs cutback asphalts.png

Fig: Position of application of tack coat


Related Discussions:- Tack coat – emulsified asphalts vs cutback asphalts

Explain mild and high-yield steel, High-yield steel vs. mild steel as road ...

High-yield steel vs. mild steel as road reinforcement High yield steel is the preferred material for the reinforcement of concrete carriageway due to the subsequent reasons:

Determine the Critical Euler Buckling Load, a) Determine the critical Eule...

a) Determine the critical Euler buckling load of a solid aluminium rod of 12 mm diameter if it has a length of 1.0 m between pin-ended supports. (E = 70000 N/mm2)       b) A

Flooring, construction detail of all types of flooring

construction detail of all types of flooring

Docks, DOCKS: Types of Docks Docks are artificial enclosures ...

DOCKS: Types of Docks Docks are artificial enclosures for the reception of ships. Three types of docks are found : (a)        Harbour Docks, or Wet Docks, which ar

Show suspended impurities in water, Q. Show Suspended Impurities in water? ...

Q. Show Suspended Impurities in water? The solid particles which are dispersed in water are referred as suspended Impurities. These are microscopic as under-

Define the meaning of circular prestressing, Define the meaning of circular...

Define the meaning of circular prestressing In circular prestressing, tendon wires are wrapped under tension over the concrete pipes which are pre-cast. The tension in the ten

Computation of settlement, Q. Computation of Settlement? The settlement...

Q. Computation of Settlement? The settlement  in any soil mass under an applied stress is given by s = s i + s c + s s where, S  =  total settlement, S i =  imm

Numericals on settlement of foundation, A footing foundation for a water to...

A footing foundation for a water tower carries a load of 9000 kN and is 3.6 metres square. It rests on dense sand of 9 m thickness overlying a clay layer of 3 metres depth. The cla

How to determine the frequency of flood, Q. How to determine the frequency ...

Q. How to determine the frequency of flood? Flood frequency may be estimated preferably from flood records, if available, for a number of years or they may be based on rainfall

Determine the principle of darcy law, Determine the principle of Darcy's la...

Determine the principle of Darcy's law for laminar flow of water through saturated soil. Illustrate that the coefficient of permeability has the dimension of velocity. The d

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd