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

Breakwaters - harbour layout, Breakwaters: A breakwater is an artific...

Breakwaters: A breakwater is an artificial structure constructed in the sea to protect ships from the effect of waves and storms. Three types of breakwaters are common :

Mechanical, Define varigions principle of moments and write about system of...

Define varigions principle of moments and write about system of forces?

Constraction, sir what is means by share force

sir what is means by share force

Define radiography - underwater inspection of bridge, Define Radiography - ...

Define Radiography - Underwater Inspection of Bridge? Radiographic non-destructive examination of components is based on the phenomenon that materials absorb radiation energy a

Mollusca, what is the taxonomy of phylum molluska

what is the taxonomy of phylum molluska

Explain the allowable strength design (asd), Allowable Strength Design (ASD...

Allowable Strength Design (ASD) Process: - Apply service loads with no load factors - Assume linear elastic analysis of structure - Calculated stresses shall not excee

Briefly explain the concept of wind-driven ventilation, Problem (a) Br...

Problem (a) Briefly explain the concept of wind-driven ventilation and outlines its benefits over mechanical/electrical means of ventilation. (b) Various factors and guidel

Find a suitable slab thickness, The continuous one-way slab shown below is ...

The continuous one-way slab shown below is loaded with a uniform service live load of 80 psf, and a superimposed dead load of 40 psf. Assume the beam width is 16" and use f'c = 5 k

Survey, what is road survey ?

what is road survey ?

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