Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
Fig: Position of application of tack coat
Lubrication of rail joints is one of the important items of permanent way works incidental to systematic track maintenance, the lubrication of joints is done for the following purp
A 30 cm diameter pile penetrates a deposit of soft clay 9 m deep and rests on sand. Compute the skin friction resistance. The clay has unit cohesion of 0.6 kg/cm 2 . Suppose
the two side are 17 cm and 28 cm long. and the lenght of the drawn to the third side is equal to 19.5cm. find tghe distance from an endpoint of this medianto the longest s8ide
Q. Write briefly for Trolley Permits? It is the permit given to the Moter Trolley / Push Trolley, Cycle / Moped Trolley. It is essential to have Trolley Permit before taking t
Define Contaminants - underwater inspection of bridge? There are various substances that may be inadvertently incorporated into the concrete matrix (e.g. glass, coal, gypsum),
what is the heat of hydration and gel space ratio?
Q. What are the various impurities in water? Ans.- Impurities in water - The impurities in water are classified as - i. Suspended Impurities. ii. Colloidal Impuritie
Uncompacted bedding for concrete pipes In the middle third of the base of precast concrete pipes, bedding layers are suggested to be left Uncompacted since it helps to decreas
can you do finite elements using the weighted residual formulation-galerkin method?
Explain the Dynamic or Vibration Tests Tests of this type, also known as sonic integrity test, involve sub- jecting the element to a single impulsive blow or cyclic load, and
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd